This paper specifies and estimates a structural dynamic model of consumer demand for new and used durable goods. Its primary contribution is to provide an explicit estimation procedure for transaction costs, which are crucial to capturing the dynamic nature of consumer decisions. In particular,...

Using new data on citations to university patents and scientific publications, and measures of distance based on Google maps, we study how geography affects university knowledge diffusion. We show that knowledge flows from patents are localized in two respects: they decline sharply with distance...

We study how fragmentation of patent rights ('patent thickets') and the formation of the Court of Appeal for the Federal Circuit (CAFC) affected the duration of patent disputes, and thus the speed of technology diffusion through licensing. We develop a model of patent litigation which predicts...

This paper shows that the inability of regulators to commit to long-term contracts is irrelevant when there is some competition between regulated firms and when firms' private information is correlated. This sharply contrasts with the dynamic of regulation without such competition. The paper...

A unifying theme in the literature on organizations such as public bureaucracies and private non-profits is the importance of missions, as opposed to profit, as an organizational goal. Such mission-oriented organizations are frequently staffed by motivated agents who subscribe to the mission....

We view a contract as a list of outcomes. Ex ante, the parties commit not to consider outcomes not on the list, i.e., these are quot;ruled outquot;. Ex post, they freely bargain over outcomes on the list, i.e., the contract specifies no mechanism to structure their choice; in this sense outcomes...

This paper introduces two complementary models of firm-specific training: an informational model and a productivity-enhancement model. In both models, market provision of firm-specific training is inefficient. However, the nature of the inefficiency depends on the balance between the two key...

Interactions between economic development and financial development are studied by looking at the roles of financial institutions in selecting Ramp;D projects (including for both imitation and innovation). Financial development is regarded as the evolution of the financing regimes. The...

Public provision of private goods such as education is usually viewed as a form of redistribution in kind. However, does it arise when income redistribution is feasible as well? In this paper I analyse a two-dimensional model of political decision making. Society has to choose both the tax rate...

We develop a model of two-stage cumulative research and development (Ramp;D), in which one Research Unit (RU) with an innovative idea bargains to license her nonverifiable interim knowledge exclusively to one of two competing Development Units (DUs) via one of two alternative modes: an Open sale...