Information and Market Equilibrium
AbstractUnder the assumption of complete markets, a fundamental result of competitive market analysis (whether for speculative or commodity markets) is that prices contain all information necessary for optimal decisionmaking by individual economic units. The role that prices play in disseminating information is analyzed in the context of two different models. First an economy under uncertainty without complete markets is analyzed. Conditions are specified under which equilibrium prices reflect (or transmit) all available information to market observers. It is shown that uninformed market observers can deduce inside information about the environment from the change in the equilibrium price when there is a one-to-one correspondence between the market price and the useful part of the information received. For a special case, sufficient conditions for invertibility are derived. Then a Bayesian hypothesis is used to study the price expectations formed on the basis of information obtained about the economy from observations of past market prices. The Bayesian price expectations are shown to converge, as price observations accumulate, to the expectations of an observer who knows the true structure of the economy.
Download InfoIf you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
Bibliographic InfoArticle provided by The RAND Corporation in its journal Bell Journal of Economics.
Volume (Year): 6 (1975)
Issue (Month): 1 (Spring)
Contact details of provider:
Web page: http://www.rje.org
You can help add them by filling out this form.
CitEc Project, subscribe to its RSS feed for this item.
- Sanford J Grossman & Joseph E Stiglitz, 1997.
"On the Impossibility of Informationally Efficient Markets,"
Levine's Working Paper Archive
1908, David K. Levine.
- Grossman, Sanford J & Stiglitz, Joseph E, 1980. "On the Impossibility of Informationally Efficient Markets," American Economic Review, American Economic Association, vol. 70(3), pages 393-408, June.
- Lawrence R. Glosten, 1978. "A 'Trade Out of Equilibrium' Model of the Stock Market," Discussion Papers 309, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ().
If references are entirely missing, you can add them using this form.