We develop an equilibrium model of industrial structure in which the organization of firms is endogenous. Differentiated consumer products can be produced either by vertically integrated firms or by pairs of specialized companies. Production of each variety of consumer good requires a unique,...

We examine the effects of the interaction between lobbying and legislative bargaining on policy formation. Two systems are considered: a US-style congressional system and a European-style parliamentary system. First we show that the policies generated are not intermediate between policies that...

World merchandise exports amounted to 5.3 trillion us dollars in 1997 and exports of commercial services amounted to 1.3 trillion. These are unpecedented volumes that have expanded much faster than income in the post-war period. More than half of the volume of merchandise trade flows amongst...

We introduce a Ramsey growth model with incomplete markets, decentralized production, and idiosyncratic technological risk. The combination of uninsurable shocks with the precautionary motive can slow down capital accumulation or give rise to persistent fluctuations even when agents are very...

To identify the determinants of social capital formation, it is necessary to understand the social capital investment decision of individuals. Individual social capital should then be aggregated to measure the social capital of a community. This paper assembles the evidence that supports the...

We study robustness of the model of demand driven innovation and spatial competition over time with log- concavely distributed signals in Jovanovic and Rob (1987) to heavy-tailedness assumptions. We demonstrate that mplications of the model remain valid for not extremely heavy-tailed...