Recent Research Interests

My current research interest is theoretical research in Industrial organization and Environmental economics, in particular, on incentives to innovation, antitrust policies, and environmental regulations. I have mainly studied oligopoly models that investigate the relation between innovation and market structures, the influence of market leaders on welfare, and the economic aspects on the extended producer responsibility (an environmental policy concept for the post consumer waste problem). Recently, I am also interested in clarifying the relation between environmental regulations and environmental investments by using the method of monotone comparative statics.

Selected Publications

  • “How Many Firms Should be Leaders? Beneficial Concentration Revisited,” International Economic Review, 53(4), pp.1323-1340, 2012. (with Toshihiro Matsumura)
  • “Optimal environmental policy for waste disposal and recycling when firms are not compliant.” Journal of Environmental Economics and Management, 62(2), pp.290-308, 2011.
  • “Oligopoly with a large number of competitors: Asymmetric limit result.” Economic Theory 39(2), pp.331-352, 2009. (with Kawamori Tomohiko)

Further Information