We study competitive interaction between a profit-maximizing firm that sells software and complementary services, and a free open-source competitor. We examine the firm's choice of business model between the proprietary model (where all software modules are proprietary), the open-source model...

We present a dynamic model where the accumulation of patents generates an increasing number of claims on sequential innovation. We compare innovation activity under three regimes—patents, no-patents, and patent pools—and find that none of them can reach the first best. We find that the first...

We study a class of repeated games with Markovian private information and characterize optimal equilibria as players become arbitrarily patient.  We show that seemingly non-cooperative action may occur in equilibrium and serve as signals of changes in private information. Players forgive such...

We present a dynamic model where the accumulation of patents generates an increasing number of claims on sequential innovation. We compare innovation activity under three regimes patents,no-patents,andpatentpoolsand find that none of them can reach the first best. We find that the first best...

We present a model of sequential innovation in which an innovator uses several research inputs to invent a new good. These inputs, in turn, must be invented before they can be used by the final innovator. As a consequence, the degree of patent protection affects the revenues and cost of the...

We present a model of industry equilibrium to study the coexistence of Open Source (OS) and Proprietary (P) firms. Two novel aspects of the model are: (1) participation in OS arises as the optimal decision of profit-maximizing firms, and (2) OS and P firms may (or may not) coexist in...

We present a model of industry equilibrium to study the coexistence of open-source and proprietary firms. Two novel aspects of the model are (i) participation in open source arises as the optimal decision of profit-maximizing firms, and (ii) open-source and proprietary firms may (or may not)...

type="main" <p>We present a model of standard setting and patent-pool formation. We study the effects of alternative standard-setting and pool-formation rules on technology choice, prices, and welfare. We find three main results. First, we show that allowing patent pools may reduce welfare when...</p>