tag:blogger.com,1999:blog-19649274.post113852788083309027..comments2024-03-29T12:03:50.891+05:30Comments on The Leap Blog: Cellphones induce greater market efficiency on the fish marketAjay Shahhttp://www.blogger.com/profile/03835842741008200034noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-19649274.post-58030681040410850522007-05-22T00:28:00.000+05:302007-05-22T00:28:00.000+05:30some how last post the first link got cut offso I ...some how last post the first link got cut off<BR/>so I am separating it into three lines<BR/><BR/>"http://www.ncaer.org/downloads/lectures/<BR/>popuppages/PressReleases/popuppages/<BR/>PressReleases/7thNBER/RJensen.pdf"Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19649274.post-66618651118914280972007-05-22T00:24:00.000+05:302007-05-22T00:24:00.000+05:30Here are two studies, I found in this bloghttp://b...Here are two studies, I found in this blog<BR/>http://bayesianheresy.blogspot.com/2007/05/how-mobile-phone-brought-down-price-of.html<BR/><BR/>http://www.ncaer.org/downloads/lectures/popuppages/PressReleases/popuppages/PressReleases/7thNBER/RJensen.pdf<BR/><BR/>http://econ.lse.ac.uk/courses/ec515/L/lecture2.pdfAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-19649274.post-79326354659665007872007-05-13T20:28:00.000+05:302007-05-13T20:28:00.000+05:30The Economist has an article on Jensen's study (Ma...<I>The Economist</I> has <A HREF="http://www.economist.com/finance/displaystory.cfm?story_id=9149142" REL="nofollow">an article</A> on Jensen's study (May 10th 2007). it cites the following reference:<BR/><BR/>*“The Digital Provide: Information (technology), market performance and welfare in the South Indian fisheries sector”, by Robert Jensen. To be published in the Quarterly Journal of Economics, August 2007.John Dalyhttps://www.blogger.com/profile/05363204598363726098noreply@blogger.comtag:blogger.com,1999:blog-19649274.post-1139295299184301742006-02-07T12:24:00.000+05:302006-02-07T12:24:00.000+05:30Thanks, Mukul, I used the new URL!Thanks, Mukul, I used the new URL!Ajay Shahhttps://www.blogger.com/profile/03835842741008200034noreply@blogger.comtag:blogger.com,1999:blog-19649274.post-1139210471114795632006-02-06T12:51:00.000+05:302006-02-06T12:51:00.000+05:30Hi Ajay,The article is now posted at the following...Hi Ajay,<BR/><BR/>The article is now posted at the following URL:<BR/><BR/>http://www.swaminomics.org/articles/20060129_Cell_ridge_the_dig.htm<BR/><BR/>Thanks,<BR/> Mukul.<BR/>http://mukulblog.blogspot.com/Anonymoushttps://www.blogger.com/profile/03487003036225542663noreply@blogger.comtag:blogger.com,1999:blog-19649274.post-1138720864324062872006-01-31T20:51:00.000+05:302006-01-31T20:51:00.000+05:30CORRECTION TO POST # 4. NOTE THE CAPITALIZED CHANG...CORRECTION TO POST # 4. NOTE THE CAPITALIZED CHANGES.<BR/>(MISTAKE DUE TO LATE NIGHT FORAYS ON CAFFEINE!) <BR/><BR/>a) the usage of technology to lock-in prices - thus in essence cellphones enable a standard futures contract markets. an empirical test should be that the ex-ANTE cell-phones the lagged prices of marine products are significant predictors of spot prices. ex-post the lagged effect of the prices of the marine products should be less stochastic, and thus the trend is significant but lagged deviations from the mean are insignificant.Kurtosishttps://www.blogger.com/profile/09085473583571681502noreply@blogger.comtag:blogger.com,1999:blog-19649274.post-1138709499720450842006-01-31T17:41:00.000+05:302006-01-31T17:41:00.000+05:30Why do you expect that in an efficient market, the...Why do you expect that in an efficient market, there should be bigger AR terms? Jensen does look at simple volatility - both across space and time - and he finds that post cellphones, the vol goes down. In the pre-cellphone period, there were episodes where the price of fish (a perishable) used to go to 0! Now those episodes don't happen.<BR/><BR/>He also tries to think about who captured what part of the welfare gains. Some of it went to the producer, some of it went to consumers. I wish we got a URL for his paper or slideshow. Thus far, it doesn't seem to be up on the net.Ajay Shahhttps://www.blogger.com/profile/03835842741008200034noreply@blogger.comtag:blogger.com,1999:blog-19649274.post-1138690943224280282006-01-31T12:32:00.000+05:302006-01-31T12:32:00.000+05:30Dear Ajay,The gains in efficiency cited need to be...Dear Ajay,<BR/>The gains in efficiency cited need to be `deconstructed' into:<BR/>(a) the usage of technology to lock-in prices - thus in essence cellphones enable a standard futures contract markets. an empirical test should be that the ex-post cell-phones the lagged prices of marine products are significant predictors of spot prices. ex-post the lagged effect of the prices of the marine products should be less stochastic, and thus the trend is significant but lagged deviations from the mean are insignificant. <BR/><BR/>(b) on a more macro-level, the risk-minimization due to technology leads to improved consumption smoothing in this micromarket - which in turn leaves other related-micromarkets (like the small restaurants, food hawkers) to either forgo, or exploit, the gains from informational arbitrage - thus causing an "informational cascade" across sectors.<BR/><BR/>don't know where to find data for (a) to write a paper. what do you think?<BR/>cheers. k.,Kurtosishttps://www.blogger.com/profile/09085473583571681502noreply@blogger.comtag:blogger.com,1999:blog-19649274.post-1138633969514352192006-01-30T20:42:00.000+05:302006-01-30T20:42:00.000+05:30HiI had been hearing about the Kerala fishermen fr...Hi<BR/><BR/>I had been hearing about the Kerala fishermen from BPL executives for some time - BPL was one of the two circle operators in Kerala. <BR/><BR/>But didn't realise how efficiently the telecom network served the waterways (and thus the river/sea economy) until I travelled, two or three years ago, by speed boat from Cochin to Alleppey and Kumarakom on the backwaters. <BR/><BR/>Amazingly, I had a signal on my mobile phone right through despite it getting pretty isolated in some parts. The guy who was driving the boat would keep getting phone calls all the time. So, he had one hand on the phone and one the wheel, the boat's wheel !<BR/><BR/>And guess what ? Driving back from Kumarakom to Cochin by road, there were long stretches when there would be no phone signal !! Don't know if its changed now.Govindraj Ethirajhttps://www.blogger.com/profile/08478366187490177419noreply@blogger.comtag:blogger.com,1999:blog-19649274.post-1138548354743166992006-01-29T20:55:00.000+05:302006-01-29T20:55:00.000+05:30Ravi,No, these two URLs are both related (insofar ...Ravi,<BR/><BR/>No, these two URLs are both related (insofar as Robert Jensen does lots of work on related themes) but they are not <I>the</I> paper on Kerala, mobile phones, and fish markets. I hope that papers turns up soon on the web.Ajay Shahhttps://www.blogger.com/profile/03835842741008200034noreply@blogger.comtag:blogger.com,1999:blog-19649274.post-1138533126172515762006-01-29T16:42:00.000+05:302006-01-29T16:42:00.000+05:30hi Sir,It is really fascinating how competition an...hi Sir,<BR/><BR/>It is really fascinating how competition and technology together can affect such positive changes across villages and societies.<BR/><BR/>Found these two pdfs from the professor you mentioned -<BR/><BR/>web.mit.edu/sinana/www/sari.pdf<BR/><BR/>www.cid.harvard.edu/cr/pdf/gitrr2002_ch07.pdf <BR/>(This is a similar study done in the Chinese market by the same gentleman)Ravi Purohithttps://www.blogger.com/profile/17616076999283569192noreply@blogger.com