<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
		>
<channel>
	<title>Comments on: Yapta Graduates From Browser Add-On to Flight-Tracking Website</title>
	<atom:link href="http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/feed/" rel="self" type="application/rss+xml" />
	<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/</link>
	<description>Startup and Technology News</description>
	<lastBuildDate>Thu, 26 Nov 2009 17:04:51 -0800</lastBuildDate>
	
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>1</sy:updateFrequency>
		<item>
		<title>By: kevin</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2523479</link>
		<dc:creator>kevin</dc:creator>
		<pubDate>Tue, 04 Nov 2008 14:07:39 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2523479</guid>
		<description>Cool site....


&lt;a href=&quot;http://www.flightstolagos.org.uk&quot; rel=&quot;nofollow&quot;&gt;Flights to Lagos&lt;/a&gt;</description>
		<content:encoded><![CDATA[<p>Cool site&#8230;.</p>
<p><a href="http://www.flightstolagos.org.uk" rel="nofollow">Flights to Lagos</a></p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Tatango &#187; Blog Archive &#187; Congratulations To Yapta</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2399587</link>
		<dc:creator>Tatango &#187; Blog Archive &#187; Congratulations To Yapta</dc:creator>
		<pubDate>Mon, 07 Jul 2008 04:58:17 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2399587</guid>
		<description>[...] We want to give a quick shout out to our friends at Yapta, another Bellingham start up that was just featured in TechCrunch for the launching of their new website. Yapta is a travel Website and browser add-on that lets you track flight prices as they change and alerts you when the price for a particular flight drops. It also helps you get a refund or credit from airlines with guaranteed low-price policies. Congrats you guys and keep up the good work! Check out the post here: TechCrunch Article [...]</description>
		<content:encoded><![CDATA[<p>[...] We want to give a quick shout out to our friends at Yapta, another Bellingham start up that was just featured in TechCrunch for the launching of their new website. Yapta is a travel Website and browser add-on that lets you track flight prices as they change and alerts you when the price for a particular flight drops. It also helps you get a refund or credit from airlines with guaranteed low-price policies. Congrats you guys and keep up the good work! Check out the post here: TechCrunch Article [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Rich</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2387896</link>
		<dc:creator>Rich</dc:creator>
		<pubDate>Thu, 26 Jun 2008 03:09:13 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2387896</guid>
		<description>@Falafulu Fisi

I did a little research on the paper you mentioned. As it turns out, Hamlet eventually turned into Farecast. This is from Professor Oren Etzioni&#039;s website: &quot;Etzioni is the founder of Farecast---a company that utilizes data mining techniques to anticipate airfare fluctuations.  The company was formerly known as Hamlet (&quot;to buy or not to buy...that is the question&quot;).  Farecast was acquired by Microsoft in 2008.&quot;</description>
		<content:encoded><![CDATA[<p>@Falafulu Fisi</p>
<p>I did a little research on the paper you mentioned. As it turns out, Hamlet eventually turned into Farecast. This is from Professor Oren Etzioni&#8217;s website: &#8220;Etzioni is the founder of Farecast&#8212;a company that utilizes data mining techniques to anticipate airfare fluctuations.  The company was formerly known as Hamlet (&#8221;to buy or not to buy&#8230;that is the question&#8221;).  Farecast was acquired by Microsoft in 2008.&#8221;</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Joe T</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384897</link>
		<dc:creator>Joe T</dc:creator>
		<pubDate>Mon, 23 Jun 2008 19:25:47 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384897</guid>
		<description>I&#039;ve tried the site multiple times already and it just doesn&#039;t work.  Is there something I&#039;m doing wrong?   Maybe they haven&#039;t optimized it for Firefox or something, because the &quot;Plan a Trip&quot; feature just freezes up when I input my choices and nothing happens.   

Is this just a non-functioning pre-beta presentation, or is this supposed to be a working model?</description>
		<content:encoded><![CDATA[<p>I&#8217;ve tried the site multiple times already and it just doesn&#8217;t work.  Is there something I&#8217;m doing wrong?   Maybe they haven&#8217;t optimized it for Firefox or something, because the &#8220;Plan a Trip&#8221; feature just freezes up when I input my choices and nothing happens.   </p>
<p>Is this just a non-functioning pre-beta presentation, or is this supposed to be a working model?</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Jim M</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384759</link>
		<dc:creator>Jim M</dc:creator>
		<pubDate>Mon, 23 Jun 2008 17:30:12 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384759</guid>
		<description>I&#039;ve used it and it&#039;s saved me money. United airlines has a policy where you can get a refund of a fare drop within 24 hours no questions asked. I think you hav eto buy the fare from united.com. in any case, i tracked it after I bought it and then got an email from yapta and then called United and it was true. Although i hate united&#039;s customer service or lack thereof, this was a bright spot. i think its the yield mgmt software companies that have the most to fear if this gets widely adopted.</description>
		<content:encoded><![CDATA[<p>I&#8217;ve used it and it&#8217;s saved me money. United airlines has a policy where you can get a refund of a fare drop within 24 hours no questions asked. I think you hav eto buy the fare from united.com. in any case, i tracked it after I bought it and then got an email from yapta and then called United and it was true. Although i hate united&#8217;s customer service or lack thereof, this was a bright spot. i think its the yield mgmt software companies that have the most to fear if this gets widely adopted.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Ruben</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384752</link>
		<dc:creator>Ruben</dc:creator>
		<pubDate>Mon, 23 Jun 2008 17:26:00 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384752</guid>
		<description>Yikes. The idea is great, but their airline selection is dismal. There are so many missing airlines that it isn&#039;t even funny, unless you happen to only fly in the US and never use low cost airlines. I made a few test runs, and it consistently failed to find the best deals. It also lacks some features already found on similar services such as date shift tolerance. Nice idea as I said, but please make it useful.</description>
		<content:encoded><![CDATA[<p>Yikes. The idea is great, but their airline selection is dismal. There are so many missing airlines that it isn&#8217;t even funny, unless you happen to only fly in the US and never use low cost airlines. I made a few test runs, and it consistently failed to find the best deals. It also lacks some features already found on similar services such as date shift tolerance. Nice idea as I said, but please make it useful.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: anon</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384518</link>
		<dc:creator>anon</dc:creator>
		<pubDate>Mon, 23 Jun 2008 13:28:37 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384518</guid>
		<description>nice site, thanks for the find</description>
		<content:encoded><![CDATA[<p>nice site, thanks for the find</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Falafulu Fisi</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384509</link>
		<dc:creator>Falafulu Fisi</dc:creator>
		<pubDate>Mon, 23 Jun 2008 13:16:39 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384509</guid>
		<description>Erick Schonfeld, sorry, I pressed the submit  button once and my comment  didn&#039;t appear. So, I chopped part of the text form the first post since it contained HTML URL, and then re-submitted for the second time, the cut-down version and it  finally appeared.  Since the I chopped half of the text from my first post that finally appeared in my second message, I thought that I posted the second part since it contains the important info about the open source WEKA project. This part didn&#039;t appear after I pressed the submit button. I thought that because it contains an HTML tag for the URL, the TechCrunch spamfilter blocked it.  The last post in @25 was done without the HTML url and it finally appeared.

So, this explains the consecutive posts with almost the same message.  Just curious, how many HTML links can you post in one message without being blocked by the TechCrunch spam filter?  Perhaps if you can give us a hint, then I will avoid posting HTML links in the future.  The info that I like to share with readers here at TechCrunch is quite informative related to state-of-the-art technology that some might find interesting perhaps for technology implementation, but lots of my posts in the past where I have included  HTML links are just being blocked by the TechCrunch spam filter.</description>
		<content:encoded><![CDATA[<p>Erick Schonfeld, sorry, I pressed the submit  button once and my comment  didn&#8217;t appear. So, I chopped part of the text form the first post since it contained HTML URL, and then re-submitted for the second time, the cut-down version and it  finally appeared.  Since the I chopped half of the text from my first post that finally appeared in my second message, I thought that I posted the second part since it contains the important info about the open source WEKA project. This part didn&#8217;t appear after I pressed the submit button. I thought that because it contains an HTML tag for the URL, the TechCrunch spamfilter blocked it.  The last post in @25 was done without the HTML url and it finally appeared.</p>
<p>So, this explains the consecutive posts with almost the same message.  Just curious, how many HTML links can you post in one message without being blocked by the TechCrunch spam filter?  Perhaps if you can give us a hint, then I will avoid posting HTML links in the future.  The info that I like to share with readers here at TechCrunch is quite informative related to state-of-the-art technology that some might find interesting perhaps for technology implementation, but lots of my posts in the past where I have included  HTML links are just being blocked by the TechCrunch spam filter.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Falafulu Fisi</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384330</link>
		<dc:creator>Falafulu Fisi</dc:creator>
		<pubDate>Mon, 23 Jun 2008 09:55:04 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384330</guid>
		<description>And also , the various algorithms covered in this paper (mentioned in my previous post) : 

&quot;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&quot;

 are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#039;t provide the link for WEKA , since any post with more than one HTML link here, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &quot;WEKA Java&quot; or &quot;WEKA data mining&quot;, you can&#039;t missed it.</description>
		<content:encoded><![CDATA[<p>And also , the various algorithms covered in this paper (mentioned in my previous post) : </p>
<p>&#8220;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&#8221;</p>
<p> are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#8217;t provide the link for WEKA , since any post with more than one HTML link here, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &#8220;WEKA Java&#8221; or &#8220;WEKA data mining&#8221;, you can&#8217;t missed it.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Falafulu Fisi</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384328</link>
		<dc:creator>Falafulu Fisi</dc:creator>
		<pubDate>Mon, 23 Jun 2008 09:53:56 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384328</guid>
		<description>And also , the various algorithms covered in this paper (mentioned in my previous post) : 

&lt;a href=&quot;http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf&quot; rel=&quot;nofollow&quot;&gt;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&lt;/a&gt;

 are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#039;t provide the link for WEKA , since any post with more than one HTML link here, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &quot;WEKA Java&quot; or &quot;WEKA data mining&quot;, you can&#039;t missed it.</description>
		<content:encoded><![CDATA[<p>And also , the various algorithms covered in this paper (mentioned in my previous post) : </p>
<p><a href="http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf" rel="nofollow">To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price</a></p>
<p> are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#8217;t provide the link for WEKA , since any post with more than one HTML link here, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &#8220;WEKA Java&#8221; or &#8220;WEKA data mining&#8221;, you can&#8217;t missed it.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Falafulu Fisi</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384327</link>
		<dc:creator>Falafulu Fisi</dc:creator>
		<pubDate>Mon, 23 Jun 2008 09:51:49 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384327</guid>
		<description>To Yapta  owner &amp; developers or anyone who is developing similar application to Yapta, might find the following paper useful.  I cut &amp; paste the abstract below, but the full paper (PDF) with title, (&quot;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&quot;)  can be downloaded by Googling for it since posting links in a message at TechCrunch will go directly to spamfolder or being deleted.

Abstract:
&lt;i&gt;As product prices become increasingly available on the World Wide Web, consumers attempt to understand how corporations vary these prices over time. However, corporations change prices based on proprietary algorithms and hidden variables (e.g., the number of unsold seats on a flight). Is it possible to develop data mining techniques that will enable consumers to predict price changes under these conditions?

This paper reports on a pilot study in the domain of airline ticket prices where we recorded over 12,000 price observations over a 41 day period. When trained on this data, Hamlet -- our multi-strategy data mining algorithm -- generated a predictive model that saved 341 simulated passengers $198,074 by advising them when to buy and when to postpone ticket purchases. Remarkably, a clairvoyant algorithm with complete knowledge of future prices could save at most $320,572 in our simulation, thus Hamlet&#039;s savings were 61.8% of optimal. The algorithm&#039;s savings of $198,074 represents an average savings of 23.8% for the 341 passengers for whom savings are possible. Overall, Hamlet saved 4.4% of the ticket price averaged over the entire set of 4,488 simulated passengers. Our pilot study suggests that mining of price data available over the web has the potential to save consumers substantial sums of money per annum.&lt;/i&gt;</description>
		<content:encoded><![CDATA[<p>To Yapta  owner &amp; developers or anyone who is developing similar application to Yapta, might find the following paper useful.  I cut &amp; paste the abstract below, but the full paper (PDF) with title, (&#8221;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&#8221;)  can be downloaded by Googling for it since posting links in a message at TechCrunch will go directly to spamfolder or being deleted.</p>
<p>Abstract:<br />
<i>As product prices become increasingly available on the World Wide Web, consumers attempt to understand how corporations vary these prices over time. However, corporations change prices based on proprietary algorithms and hidden variables (e.g., the number of unsold seats on a flight). Is it possible to develop data mining techniques that will enable consumers to predict price changes under these conditions?</p>
<p>This paper reports on a pilot study in the domain of airline ticket prices where we recorded over 12,000 price observations over a 41 day period. When trained on this data, Hamlet &#8212; our multi-strategy data mining algorithm &#8212; generated a predictive model that saved 341 simulated passengers $198,074 by advising them when to buy and when to postpone ticket purchases. Remarkably, a clairvoyant algorithm with complete knowledge of future prices could save at most $320,572 in our simulation, thus Hamlet&#8217;s savings were 61.8% of optimal. The algorithm&#8217;s savings of $198,074 represents an average savings of 23.8% for the 341 passengers for whom savings are possible. Overall, Hamlet saved 4.4% of the ticket price averaged over the entire set of 4,488 simulated passengers. Our pilot study suggests that mining of price data available over the web has the potential to save consumers substantial sums of money per annum.</i></p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Falafulu Fisi</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384325</link>
		<dc:creator>Falafulu Fisi</dc:creator>
		<pubDate>Mon, 23 Jun 2008 09:47:36 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384325</guid>
		<description>To Yapta  owner &amp; developers or anyone who is developing similar application to Yapta, might find the following paper useful.  I cut &amp; paste the abstract below, but the full paper (PDF) with title, (&quot;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&quot;)  can be downloaded from the link shown (end of message).

Abstract:
&lt;i&gt;As product prices become increasingly available on the World Wide Web, consumers attempt to understand how corporations vary these prices over time. However, corporations change prices based on proprietary algorithms and hidden variables (e.g., the number of unsold seats on a flight). Is it possible to develop data mining techniques that will enable consumers to predict price changes under these conditions?

This paper reports on a pilot study in the domain of airline ticket prices where we recorded over 12,000 price observations over a 41 day period. When trained on this data, Hamlet -- our multi-strategy data mining algorithm -- generated a predictive model that saved 341 simulated passengers $198,074 by advising them when to buy and when to postpone ticket purchases. Remarkably, a clairvoyant algorithm with complete knowledge of future prices could save at most $320,572 in our simulation, thus Hamlet&#039;s savings were 61.8% of optimal. The algorithm&#039;s savings of $198,074 represents an average savings of 23.8% for the 341 passengers for whom savings are possible. Overall, Hamlet saved 4.4% of the ticket price averaged over the entire set of 4,488 simulated passengers. Our pilot study suggests that mining of price data available over the web has the potential to save consumers substantial sums of money per annum.&lt;/i&gt;

And also , the various algorithms covered in this paper : 

&quot;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&quot;
http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf

 are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#039;t provide the link for WEKA , since any post with more than one HTML link here, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &quot;WEKA Java&quot; or &quot;WEKA data mining&quot;, you can&#039;t missed it.</description>
		<content:encoded><![CDATA[<p>To Yapta  owner &amp; developers or anyone who is developing similar application to Yapta, might find the following paper useful.  I cut &amp; paste the abstract below, but the full paper (PDF) with title, (&#8221;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&#8221;)  can be downloaded from the link shown (end of message).</p>
<p>Abstract:<br />
<i>As product prices become increasingly available on the World Wide Web, consumers attempt to understand how corporations vary these prices over time. However, corporations change prices based on proprietary algorithms and hidden variables (e.g., the number of unsold seats on a flight). Is it possible to develop data mining techniques that will enable consumers to predict price changes under these conditions?</p>
<p>This paper reports on a pilot study in the domain of airline ticket prices where we recorded over 12,000 price observations over a 41 day period. When trained on this data, Hamlet &#8212; our multi-strategy data mining algorithm &#8212; generated a predictive model that saved 341 simulated passengers $198,074 by advising them when to buy and when to postpone ticket purchases. Remarkably, a clairvoyant algorithm with complete knowledge of future prices could save at most $320,572 in our simulation, thus Hamlet&#8217;s savings were 61.8% of optimal. The algorithm&#8217;s savings of $198,074 represents an average savings of 23.8% for the 341 passengers for whom savings are possible. Overall, Hamlet saved 4.4% of the ticket price averaged over the entire set of 4,488 simulated passengers. Our pilot study suggests that mining of price data available over the web has the potential to save consumers substantial sums of money per annum.</i></p>
<p>And also , the various algorithms covered in this paper : </p>
<p>&#8220;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&#8221;<br />
<a href="http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf" rel="nofollow"></a><a href='http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf'>http://knight.c...amlet-kdd03.pdf</a></p>
<p> are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#8217;t provide the link for WEKA , since any post with more than one HTML link here, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &#8220;WEKA Java&#8221; or &#8220;WEKA data mining&#8221;, you can&#8217;t missed it.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Falafulu Fisi</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384324</link>
		<dc:creator>Falafulu Fisi</dc:creator>
		<pubDate>Mon, 23 Jun 2008 09:46:10 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384324</guid>
		<description>To Yapta  owner &amp; developers or anyone who is developing similar application to Yapta, might find the following paper useful.  I cut &amp; paste the abstract below, but the full paper (PDF) with title, (&quot;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&quot;)  can be downloaded from the link shown (end of message).

Abstract:
&lt;i&gt;As product prices become increasingly available on the World Wide Web, consumers attempt to understand how corporations vary these prices over time. However, corporations change prices based on proprietary algorithms and hidden variables (e.g., the number of unsold seats on a flight). Is it possible to develop data mining techniques that will enable consumers to predict price changes under these conditions?

This paper reports on a pilot study in the domain of airline ticket prices where we recorded over 12,000 price observations over a 41 day period. When trained on this data, Hamlet -- our multi-strategy data mining algorithm -- generated a predictive model that saved 341 simulated passengers $198,074 by advising them when to buy and when to postpone ticket purchases. Remarkably, a clairvoyant algorithm with complete knowledge of future prices could save at most $320,572 in our simulation, thus Hamlet&#039;s savings were 61.8% of optimal. The algorithm&#039;s savings of $198,074 represents an average savings of 23.8% for the 341 passengers for whom savings are possible. Overall, Hamlet saved 4.4% of the ticket price averaged over the entire set of 4,488 simulated passengers. Our pilot study suggests that mining of price data available over the web has the potential to save consumers substantial sums of money per annum.&lt;/i&gt;

And also , the various algorithms covered in this paper : &lt;a href=&quot;http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf&quot; rel=&quot;nofollow&quot;&gt;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&lt;/a&gt; are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#039;t provide the link for WEKA , since any post with more than one HTML link here, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &quot;WEKA Java&quot; or &quot;WEKA data mining&quot;, you can&#039;t missed it.</description>
		<content:encoded><![CDATA[<p>To Yapta  owner &amp; developers or anyone who is developing similar application to Yapta, might find the following paper useful.  I cut &amp; paste the abstract below, but the full paper (PDF) with title, (&#8221;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&#8221;)  can be downloaded from the link shown (end of message).</p>
<p>Abstract:<br />
<i>As product prices become increasingly available on the World Wide Web, consumers attempt to understand how corporations vary these prices over time. However, corporations change prices based on proprietary algorithms and hidden variables (e.g., the number of unsold seats on a flight). Is it possible to develop data mining techniques that will enable consumers to predict price changes under these conditions?</p>
<p>This paper reports on a pilot study in the domain of airline ticket prices where we recorded over 12,000 price observations over a 41 day period. When trained on this data, Hamlet &#8212; our multi-strategy data mining algorithm &#8212; generated a predictive model that saved 341 simulated passengers $198,074 by advising them when to buy and when to postpone ticket purchases. Remarkably, a clairvoyant algorithm with complete knowledge of future prices could save at most $320,572 in our simulation, thus Hamlet&#8217;s savings were 61.8% of optimal. The algorithm&#8217;s savings of $198,074 represents an average savings of 23.8% for the 341 passengers for whom savings are possible. Overall, Hamlet saved 4.4% of the ticket price averaged over the entire set of 4,488 simulated passengers. Our pilot study suggests that mining of price data available over the web has the potential to save consumers substantial sums of money per annum.</i></p>
<p>And also , the various algorithms covered in this paper : <a href="http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf" rel="nofollow">To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price</a> are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#8217;t provide the link for WEKA , since any post with more than one HTML link here, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &#8220;WEKA Java&#8221; or &#8220;WEKA data mining&#8221;, you can&#8217;t missed it.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Falafulu Fisi</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384322</link>
		<dc:creator>Falafulu Fisi</dc:creator>
		<pubDate>Mon, 23 Jun 2008 09:43:35 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384322</guid>
		<description>To Yapta  owners/developers or anyone who is developing similar application to Yapta, might find the following paper useful.  I cut &amp; paste the abstract below, but the full paper (PDF) with title, (&quot;&lt;i&gt;&lt;b&gt;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&lt;/b&gt;&lt;/i&gt;&quot;)  can be downloaded from the link shown (end of message).

&lt;b&gt;Abstract:&lt;/b&gt;
&lt;i&gt;&lt;b&gt;As product prices become increasingly available on the World Wide Web, consumers attempt to understand how corporations vary these prices over time. However, corporations change prices based on proprietary algorithms and hidden variables (e.g., the number of unsold seats on a flight). Is it possible to develop data mining techniques that will enable consumers to predict price changes under these conditions?

This paper reports on a pilot study in the domain of airline ticket prices where we recorded over 12,000 price observations over a 41 day period. When trained on this data, Hamlet -- our multi-strategy data mining algorithm -- generated a predictive model that saved 341 simulated passengers $198,074 by advising them when to buy and when to postpone ticket purchases. Remarkably, a clairvoyant algorithm with complete knowledge of future prices could save at most $320,572 in our simulation, thus Hamlet&#039;s savings were 61.8% of optimal. The algorithm&#039;s savings of $198,074 represents an average savings of 23.8% for the 341 passengers for whom savings are possible. Overall, Hamlet saved 4.4% of the ticket price averaged over the entire set of 4,488 simulated passengers. Our pilot study suggests that mining of price data available over the web has the potential to save consumers substantial sums of money per annum.&lt;/b&gt;&lt;/i&gt;

And also , the various algorithms covered in this paper : &lt;a href=&quot;http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf&quot; rel=&quot;nofollow&quot;&gt;To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price&lt;/a&gt; are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#039;t provide the link for WEKA , since any post with more than one HTML link, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &quot;WEKA Java&quot;, you can&#039;t missed it.</description>
		<content:encoded><![CDATA[<p>To Yapta  owners/developers or anyone who is developing similar application to Yapta, might find the following paper useful.  I cut &amp; paste the abstract below, but the full paper (PDF) with title, (&#8221;<i><b>To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price</b></i>&#8220;)  can be downloaded from the link shown (end of message).</p>
<p><b>Abstract:</b><br />
<i><b>As product prices become increasingly available on the World Wide Web, consumers attempt to understand how corporations vary these prices over time. However, corporations change prices based on proprietary algorithms and hidden variables (e.g., the number of unsold seats on a flight). Is it possible to develop data mining techniques that will enable consumers to predict price changes under these conditions?</p>
<p>This paper reports on a pilot study in the domain of airline ticket prices where we recorded over 12,000 price observations over a 41 day period. When trained on this data, Hamlet &#8212; our multi-strategy data mining algorithm &#8212; generated a predictive model that saved 341 simulated passengers $198,074 by advising them when to buy and when to postpone ticket purchases. Remarkably, a clairvoyant algorithm with complete knowledge of future prices could save at most $320,572 in our simulation, thus Hamlet&#8217;s savings were 61.8% of optimal. The algorithm&#8217;s savings of $198,074 represents an average savings of 23.8% for the 341 passengers for whom savings are possible. Overall, Hamlet saved 4.4% of the ticket price averaged over the entire set of 4,488 simulated passengers. Our pilot study suggests that mining of price data available over the web has the potential to save consumers substantial sums of money per annum.</b></i></p>
<p>And also , the various algorithms covered in this paper : <a href="http://knight.cis.temple.edu/~yates//papers/hamlet-kdd03.pdf" rel="nofollow">To Buy or Not to Buy: Mining Airfare Data to Minimize Ticket Purchase Price</a> are available in the most popular Java open source data-mining project from here in New Zealand called  WEKA , from the University of Waikato. I can&#8217;t provide the link for WEKA , since any post with more than one HTML link, the  TechCrunch spamfilter blocks it, but just Google for it using search terms as  &#8220;WEKA Java&#8221;, you can&#8217;t missed it.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Rosh</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384140</link>
		<dc:creator>Rosh</dc:creator>
		<pubDate>Mon, 23 Jun 2008 03:24:00 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384140</guid>
		<description>The flight prices did seem very expensive.  I do like all the information.  Good for photographer flying around the country.

rosh
http://www.newmediaphotographer.com</description>
		<content:encoded><![CDATA[<p>The flight prices did seem very expensive.  I do like all the information.  Good for photographer flying around the country.</p>
<p>rosh<br />
<a href="http://www.newmediaphotographer.com" rel="nofollow"></a><a href='http://www.newmediaphotographer.com'>http://www.newm...hotographer.com</a></p>
]]></content:encoded>
	</item>
	<item>
		<title>By: James Dean</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384093</link>
		<dc:creator>James Dean</dc:creator>
		<pubDate>Mon, 23 Jun 2008 01:45:22 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384093</guid>
		<description>@ Chris

... and TechCrunch (aka &quot;All Things Y!&quot;) traffic has fallen off the table in the past week.</description>
		<content:encoded><![CDATA[<p>@ Chris</p>
<p>&#8230; and TechCrunch (aka &#8220;All Things Y!&#8221;) traffic has fallen off the table in the past week.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: TechCrunch Japanese アーカイブ &#187; Yaptaがブラウザーアドオンを卒業、フライト追跡サイトへ</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384043</link>
		<dc:creator>TechCrunch Japanese アーカイブ &#187; Yaptaがブラウザーアドオンを卒業、フライト追跡サイトへ</dc:creator>
		<pubDate>Mon, 23 Jun 2008 00:22:57 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384043</guid>
		<description>[...] [原文へ] [...]</description>
		<content:encoded><![CDATA[<p>[...] [原文へ] [...]</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Greg</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384041</link>
		<dc:creator>Greg</dc:creator>
		<pubDate>Mon, 23 Jun 2008 00:18:13 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384041</guid>
		<description>I just tried booking a flight from Sydney to NZ and the best price they have is three times the normal airfare!

They must not cover some reasonable size airlines yet - qantas, emirates, air nz.</description>
		<content:encoded><![CDATA[<p>I just tried booking a flight from Sydney to NZ and the best price they have is three times the normal airfare!</p>
<p>They must not cover some reasonable size airlines yet &#8211; qantas, emirates, air nz.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Mehdi Akiki</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384037</link>
		<dc:creator>Mehdi Akiki</dc:creator>
		<pubDate>Sun, 22 Jun 2008 23:57:52 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384037</guid>
		<description>This is a very interesting service and can be used for a variety of ventures that are related to tourism as well as health.</description>
		<content:encoded><![CDATA[<p>This is a very interesting service and can be used for a variety of ventures that are related to tourism as well as health.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Evan</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2384000</link>
		<dc:creator>Evan</dc:creator>
		<pubDate>Sun, 22 Jun 2008 22:57:55 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2384000</guid>
		<description>@Dennis - This is not true with all of TC with regards to shitty journalism, just Erick&#039;s posts in my opinion, not really bad journalism I guess but just lazy, a lot of what what is  posted is simply regurgitation, especially regarding technical information and a lot of time the results are innaccurate, when a little bit of research into a topic would reveal quite a bit more information and would be better help to TC readers. Just my opinion.</description>
		<content:encoded><![CDATA[<p>@Dennis &#8211; This is not true with all of TC with regards to shitty journalism, just Erick&#8217;s posts in my opinion, not really bad journalism I guess but just lazy, a lot of what what is  posted is simply regurgitation, especially regarding technical information and a lot of time the results are innaccurate, when a little bit of research into a topic would reveal quite a bit more information and would be better help to TC readers. Just my opinion.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Chris</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2383957</link>
		<dc:creator>Chris</dc:creator>
		<pubDate>Sun, 22 Jun 2008 21:32:38 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2383957</guid>
		<description>http://www.alexa.com/data/details/traffic_details/scobleizer.com

Another story not reported by TC, Robert Scoble, self proclaimed, the first ever blogger, is rapidly and largely losing his audience. I noticed this progression start earlier this year, and it hasn&#039;t stopped yet. When I saw this I shed a tear.</description>
		<content:encoded><![CDATA[<p><a href="http://www.alexa.com/data/details/traffic_details/scobleizer.com" rel="nofollow"></a><a href='http://www.alexa.com/data/details/traffic_details/scobleizer.com'>http://www.alex.../scobleizer.com</a></p>
<p>Another story not reported by TC, Robert Scoble, self proclaimed, the first ever blogger, is rapidly and largely losing his audience. I noticed this progression start earlier this year, and it hasn&#8217;t stopped yet. When I saw this I shed a tear.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Chris</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2383938</link>
		<dc:creator>Chris</dc:creator>
		<pubDate>Sun, 22 Jun 2008 20:25:34 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2383938</guid>
		<description>&quot;Hopefully next year I will be able to buy a 09 Dodge Challenger I want that big 6.1 V8&quot;

Gas is getting up near $5 a gallon here in SoCal. You must be making crazy money my friend. Good luck with the Challenger. That&#039;s a fscking sweet vehicle.

If I was insanely rich I would buy my favorite car in Gran Turismo 5 Prologue.
http://www.gtrblog.com/media/blogs/gtrblog/PowerHouseAmuse/thumb_plugin/amuse-tsukuba-001.jpg

I actually want most of the cars in Gran Turismo 5.</description>
		<content:encoded><![CDATA[<p>&#8220;Hopefully next year I will be able to buy a 09 Dodge Challenger I want that big 6.1 V8&#8243;</p>
<p>Gas is getting up near $5 a gallon here in SoCal. You must be making crazy money my friend. Good luck with the Challenger. That&#8217;s a fscking sweet vehicle.</p>
<p>If I was insanely rich I would buy my favorite car in Gran Turismo 5 Prologue.<br />
<a href="http://www.gtrblog.com/media/blogs/gtrblog/PowerHouseAmuse/thumb_plugin/amuse-tsukuba-001.jpg" rel="nofollow"></a><a href='http://www.gtrblog.com/media/blogs/gtrblog/PowerHouseAmuse/thumb_plugin/amuse-tsukuba-001.jpg'>http://www.gtrb...tsukuba-001.jpg</a></p>
<p>I actually want most of the cars in Gran Turismo 5.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: CrunchNow Dot com</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2383932</link>
		<dc:creator>CrunchNow Dot com</dc:creator>
		<pubDate>Sun, 22 Jun 2008 20:11:33 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2383932</guid>
		<description>Dennis sounds like tech crunch made you mad also.. I got so mad at mike for trying to sue everyone especially facebook. People use others images all the time the paparazzi for example profit off a picture,you don&#039;t see every celebrity suing them.

Here is the article on my thoughts.

http://www.crunchnow.com/2008/06/retard-michael-arrington-suing-facebook.html</description>
		<content:encoded><![CDATA[<p>Dennis sounds like tech crunch made you mad also.. I got so mad at mike for trying to sue everyone especially facebook. People use others images all the time the paparazzi for example profit off a picture,you don&#8217;t see every celebrity suing them.</p>
<p>Here is the article on my thoughts.</p>
<p><a href="http://www.crunchnow.com/2008/06/retard-michael-arrington-suing-facebook.html" rel="nofollow"></a><a href='http://www.crunchnow.com/2008/06/retard-michael-arrington-suing-facebook.html'>http://www.crun...g-facebook.html</a></p>
]]></content:encoded>
	</item>
	<item>
		<title>By: Dennis</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2383928</link>
		<dc:creator>Dennis</dc:creator>
		<pubDate>Sun, 22 Jun 2008 20:03:16 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2383928</guid>
		<description>Sorry, a somewhat pedantic comment, but for TC to say &quot;So far, with just its browser add-on, Yapta users have tracked more than one million flights and identified over $60 million in savings.&quot; is shitty journalism, regurgitating as if it were fact a probably-lying press release.  $60m?  Yeah, right.</description>
		<content:encoded><![CDATA[<p>Sorry, a somewhat pedantic comment, but for TC to say &#8220;So far, with just its browser add-on, Yapta users have tracked more than one million flights and identified over $60 million in savings.&#8221; is shitty journalism, regurgitating as if it were fact a probably-lying press release.  $60m?  Yeah, right.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: CrunchNow Dot com</title>
		<link>http://www.techcrunch.com/2008/06/22/yapta-graduates-from-browser-add-on-to-flight-tracking-website/comment-page-1/#comment-2383924</link>
		<dc:creator>CrunchNow Dot com</dc:creator>
		<pubDate>Sun, 22 Jun 2008 19:57:40 +0000</pubDate>
		<guid isPermaLink="false">http://www.techcrunch.com/?p=19216#comment-2383924</guid>
		<description>Yeah Chris, 

I bought that car in  06 It was a 05 model when I got it, and was actually looking for a supra but couldn&#039;t find a newer one.
The car did what i wanted it to do and that&#039;s help find the chicks :} I was 19 then.Hopefully next year I will be able to buy a 09 Dodge Challenger I want that big 6.1 V8</description>
		<content:encoded><![CDATA[<p>Yeah Chris, </p>
<p>I bought that car in  06 It was a 05 model when I got it, and was actually looking for a supra but couldn&#8217;t find a newer one.<br />
The car did what i wanted it to do and that&#8217;s help find the chicks :} I was 19 then.Hopefully next year I will be able to buy a 09 Dodge Challenger I want that big 6.1 V8</p>
]]></content:encoded>
	</item>
</channel>
</rss>
