This document examines optimal capital taxation with wage-setting labour unions when the government taxes consumption, labour, and capital. The results are as follows. If unions can commit themselves to particular wages for a long period, then there is no hold-up problem. Otherwise, the hold-up...

Economic integration is examined in a multi-economy Schumpeterian growth model where economies differ in their research environment, and consequently in the productivity of R&D. It is shown that economies with more or less the same productivity of R&D integrate. In equilibrium, there can be many...

Since World War II, mortality has decreased in the developing world. This paper explores the effects of this mortality fall on economic and demographic growth by a family-optimization model, in which fertility is endogenous and relative wealth yields utility because of status-seeking. The main...

This document considers an economy with many regions and two engines of growth: horizontal R&D, which increases the number of polluting product lines; and vertical R&D, which improves productivity in these lines. Pollution in any region decreases welfare in all regions. Any group of regions can...

I consider the case where the conservation of land yields utility through biodiversity, firms improve their efficiency by in-house R&D and a large number of countries establish a self-interested government for biodiversity management. I compare the regulation of land use with direct subsidies...

I examine GHG emission policy in a world with a fixed number of regions. In each region, labor and emissions are complementary in production, total world-wide emissions decrease welfare, and total factor productivity can be improved by R&D. A subset of regions can establish an "abatement...

I examine a common market with the following institutions. Oligopolistic firms improve their productivity by R&D. Wages are determined by union-employer bargaining. Firms and workers lobby the authority that accepts new members and regulates unions' and firms' market power. The main findings are...

This study examines optimal public policy in a product cycle model where R&D firms innovate and imitate and households face non-diversifiable risk. The government controls product cycles by two policy instruments: patent length, i.e. the expected time an innovation is imitated, and patent width,...