Welfare Effects of Endogenous Information Acquisition and Disclosure in Duopoly Markets


This paper investigates the interaction between firms' information acquisition decisions and disclosure of internally acquired information in a Cournot duopoly market. The results are as follows. Given that the precision of firms' private information is constant, mandatory disclosure of information about the industry-wide demand uncertainty can enhance social welfare. However, when the precision of firms' private information is endogenously determined, mandatory disclosure is not always desirable. This is because when disclosure is mandated, firms acquire less precise information compared to the case where acquired information is not disclosed, and hence their internal information environments are deteriorated. This can lead to "unintended consequences," such that disclosure regulation strictly decreases social welfare on the whole.


Information acquisition, Disclosure, Duopoly, Social welfare

JEL Classification

L13, M41, M48


Kazunori MIWA
Research Institute for Economics and Business Administration,
Kobe University
Rokkodai-cho, Nada-ku, Kobe
657-8501 Japan
Phone: +81-78-803-7036
FAX: +81-78-803-7059