A number of branches of the literature on internal labor markets have matured to the point that there is now a healthy two-way interaction between theory and empirical work. In this survey I consider two of these branches: i) wage and promotion dynamics; and ii) human-resource practices. For...

This paper formally explores the optimal length of copyright protection when the value of an intellectual work changes over time due to depreciation and value-enhancing ex-post investments. The first main finding is that, in the case of a single project, granting infinitely-lived copyright...

Significant attention has been paid to why a durable-goods producer with little or no market power would monopolize the maintenance market for its own product. This paper provides an explanation for this practice that is based on consumer switching costs and the choice of consumers between...

An extensive theoretical literature has developed that investigates the role of promotions as a signal of worker ability. There have been no tests, however, of the empirical validity of this idea. In this paper we develop the theory in a manner that allows us to generate testable predictions,...

Beginning with Waldman (Rand 1984), it is well understood that in a world characterized by asymmetric learning promotions can serve as a signal of worker ability which can, in turn, lead to an inefficiently small number of promotions. In this paper we explore two related issues. First, how...

One argument concerning copyright protection is that the returns to copyright protection are limited because of indirect appropriability, where indirect appropriability is the idea that original producers receive returns from copying because the buyers of original units are willing to pay more...