We provide an alternative theoretical explanation for a number of empirical regularities relating to the dynamics of industry structrure (product life cycle) and changes in size and age distribution of firms over time. We explain why entry may continue over a considerable period of time, why...

We provide a framework for inference in discrete games that involve multiple decision makers and use it to study airline market structure in the US. We make inferences on a "class of models" rather that looking for point identifying assumptions that pin down a unique model. Making inferences in...

We examine the impact of internal and external R&D on labor productivity in a 6-year panel of Dutch manufacturing firms. We apply a dynamic linear panel data model that allows for decreasing or increasing returns to scale in internal and external R&D and for economies of scope. We find...

The mixed picture of extant research on the relationship between internal and external R&D prompts us to ask such a question: under what conditions is there complementarity or substitutability between different R&D strategies? The goal of this paper is to contribute to the empirical literature...