We study disclosure of information about the multidimensional state of the world when uninformed receivers' actions affect the sender's utility. Given a disclosure rule, the receivers form an expectation about the state following each message. Under the assumption that the sender's expected...

We consider mergers between multi-product firms in a market with monopolistically competitive fringe of single-product firms. Aggregate product variety is determined by product variety choices of multi-product firms and entry/exit decisions of single-product firms. Mergers can generate marginal...

A university long-distance relay road race, the Hakone Ekiden, is widely acknowledged as the most popular New Year's sporting event in Japan. The event is held immediately prior to the university application period in Japan. Using Japanese panel data for 2001-2014, this study examined how the...

This paper analyzes the optimal content regulation of direct-to-consumer advertisement (DTCA) in a pharmaceutical market, with particular focus on the distinction between product and enlightenment advertisement. Firms are allowed to freely promote their own specific products under product DTCA,...

This paper examines the optimal content regulation of DTCA by comparing two forms of DTCA-product-specific and category-specific-and identifies a key tradeoff which underlies this policy debate. Our analysis suggests that the optimal form of DTCA depends crucially on the cost effectiveness of...

This paper reports the theoretical and experimental results of auctions for public construction in which firms cut corners. We show that winning bids and qualities of the constructed buildings are both zero in equilibria if there are at least two firms whose initial cash balances are zero. The...

Several Japanese local governments started to add endogenous minimum prices to firstprice auctions in their public procurements. Any bid less than the endogenous minimum price is referred to as abnormally low and is excluded from the procurement procedure. The endogenous minimum price is...

We provide a simple model to investigate decisions on vertical integration/separation. The key feature of this model is that more than one input is required for the final products of the local downstream monopolists. Depending on their cost structure, downstream firms' decisions on vertical...

AT&T was known for both funding a world-class research lab and delaying deployment of useful innovations from the lab. To explain this behavior we consider a model with an incumbent facing a potential entrant. The incumbent can choose from two technologies for production: old and new. The...

We examine whether cooperation in R&D leads to product market collusion. Suppose that firms engage in a stochastic R&D race while maintaining the collusive equilibrium in a repeated-game framework. Innovation under competitive R&D creates inter-firm asymmetries, which destabilizes the collusive...