Information Trading in Social Networks

Karavaev, Andrei (2008): Information Trading in Social Networks.

Abstract

This paper considers information trading in fixed networks of economic agents who can only observe and trade with other agents with whom they are directly connected. We study the nature of price competition for information in this environment. The linear network, when the agents are located at the integer points of the real line, is a specific example I completely characterize. For the linear network there always exists a stationary equilibrium, where the strategies do not depend on time. I show that there is an equilibrium where any agent has a nonzero probability of staying uninformed forever. Under certain initial conditions this equilibrium is a limit of equilibria of finite-horizon games. The role of a transversality condition is emphasized, namely that the price in the transaction should not exceed the expected utility of all the agents who get the information due to the transaction. I show that the price offered does not converge to zero with time.

• Item Type: MPRA Paper
• Language: English
• Keywords: Networks; information trading; information diffusion
• Subjects: Z - Other Special Topics > Z1 - Cultural Economics ; Economic Sociology ; Economic Anthropology > Z13 - Economic Sociology ; Economic Anthropology ; Social and Economic Stratification; D - Microeconomics > D8 - Information, Knowledge, and Uncertainty > D83 - Search ; Learning ; Information and Knowledge ; Communication ; Belief ; Unawareness; O - Economic Development, Innovation, Technological Change, and Growth > O3 - Innovation ; Research and Development ; Technological Change ; Intellectual Property Rights > O33 - Technological Change: Choices and Consequences ; Diffusion Processes; D - Microeconomics > D8 - Information, Knowledge, and Uncertainty > D85 - Network Formation and Analysis: Theory

References

Bala, Venkatesh, and Sanjeev Goyal. 1998. "Learning from Neighbors." Review of Economic Studies 65(3), pp. 595-621.

Banerjee, Abhijit V., and Kaivan D. Munshi. 2000. "Networks, Migration and Investment: Insiders and Outsiders in Tirupur's Production Cluster." MIT Department of Economics Working Paper Series No. 00-08.

Belli, Pedro. 1997. "The Comparative Advantage of Government: a Review." World Bank Policy Research Working Paper No. 1834.

Billingsley, Patrick. 1995. "Probability and Measure." Edition 3. New York: John Wiley & Sons.

Boyd, Robert, and Peter J. Richerson. 2005. "Solving the Puzzle of Human Cooperation," In: "Evolution and Culture," S. Levinson ed. MIT Press, Cambridge MA, pp. 105-132.

Chatterjee, Kalyan, and Susan H. Xu. 2004. "Technology Diffusion by Learning from Neighbors." Advances in Applied Probability 36(2), pp. 355-376.

Conley, Timothy G., and Christopher R. Udry. 2000. "Learning About a New Technology: Pineapple in Ghana." Economic Growth Center Discussion Paper No. 817. New Haven: Yale University.

Eshel, Ilan, Larry Samuelson, and Avner Shaked. 1998. "Altruists, Egoists, and Hooligans in a Local Interaction Model." American Economic Review 88(1), pp. 157-179.

Foster, Andrew D., and Mark R. Rosenzweig. 1995. "Learning by Doing and Learning from Others: Human Capital and Technical Change in Agriculture." Journal of Political Economy 103(6), pp. 1176-1209.

Fudenberg, Drew, David K. Levine, and Eric Maskin. 1994. "The Folk Theorem with Imperfect Public Information." Econometrica 62(5), pp. 997-1039.

von Hippel, Eric. 1988. "The Sources of Innovation." New York: Oxford University Press, 218 p.

Muto, Shigeo. 1986. "An Information Good Market with Symmetric Externalities." Econometrica 54(2), pp. 295-312.

Polanski, Arnold. 2007. "A Decentralized Model of Information Pricing in Networks." Journal of Economic Theory 136, pp. 497–512.