We study a repeated game where a seller, who has a short-term incentive to supply low quality, is periodically matched with a randomly selected buyer. Buyers observe only the outcomes of their neighbors' games and may receive signals from them. When the buyer population is large, the seller may...

This paper analyzes public certification program where the government sets a quality standard and provides labels to sellers whose qualities are above the standard. Buyers are uninformed of sellers¡¯ qualities without the program. We study an optimal level of quality standard or optimal ratio...

We present a framework to evaluate the impact of digital music distribution. We set up a representative model that enables the comparative static analysis. We then interpret two empirical observations about the music industry, the sales decline and the price constancy, and fit the model to these...

The entry of a foreign firm has two counterbalancing effects on domestic social welfare. As the competition level in the domestic market increases by the entry, domestic incumbent firms' outputs and profits decrease. On the other hand, the price goes down and thus consumers' surplus increases....

We examine the optimal level of Digital Rights Management when stronger DRM makes copyright infringement more difficult, but at the cost of decreased value for legal users. We find that DRM-free is profit-maximizing when copyright enforcement is strong or free-rider problems are severe....

We examine mixed bundling in a competitive environment that incorporates vertical product differentiation. We show that, compared to the equilibrium without bundling, (i) prices, profits and social welfare are lower, whereas (ii) consumer surplus is higher in the equilibrium with mixed bundling....

We develop a model based on risk averse investors and limited arbitrage capital to explain the rationale for the so called carry trades: that is, trades where “the purchase of riskier, higher-yielding assets is funded by selling lower-yielding currencies” (Financial Times, January 28, 2008)....

We present a theory of the linkages between corporate governance, corporate finance, and the real sector of an economy. Using a structural model of industry equilibrium with endogenous entry, we show that poor corporate governance leads to low levels of competition, and to firms with high...

We present evidence that some mutual funds systematically act as contrarian traders, and earn returns in the stock market by providing liquidity to investors that demand immediacy, while others systematically realize costs of immediacy. On average, the mutual funds’ costs of immediacy exceed...