This paper presents evidence that the spread between the marginal product of capital and the return on financial assets is mich higher in poor than in rich countries. A model with costly intermediation is developed. In this economy, individuals choose at each instant whether to work or to...

Existing literature ignores adaptation responses to external effects which, in turn, affect the design of appropriate internalization instruments. We use general equilibrium numerical simulation models based on OECD and UK data to analyze the significance of these responses to congestion...