In this paper, we investigate how residential segregation and bad physical access to jobs contribute to urban unemployment in the Paris region. We first survey the general mechanisms according to which residential segregation and spatial mismatch can have adverse labour-market outcomes. We then...

We use a Ricardo-Viner model to study the determinants of the supply of outmigration in developing countries in a model with heterogenous households. We assume that heterogeneity and migration costs prevent households from total migration. Data are calibrated to two archetypal developing...

This paper provides insights into the relationship between the substantial ageing of the European labour force, large migration movements, and individual labour mobility. First, qualitative predictions are derived using the theory of production with multiple inputs. Second, quantitative...

This paper argues that the theoretical foundations for the gravity equation are general, while the empirical performance of the gravity equation is specific to the type of goods examined. Most existing theory for the gravity equation depends on the assumption of differentiated goods. We show...

Development accounting exercises based on an aggregate production function find technology is biased in favour of a country's abundant production factors. We provide an explanation to this finding based on the Heckscher-Ohlin model. Countries trade and specialize in the industries that use...

We construct and numerically solve a dynamic Heckscher-Ohlin model in which the initial distribution of production factors in the world makes worldwide factor price equalization impossible, and leads countries to group in two diversification cones. We study the dynamics of income per capita and...

In Centre for Economic Policy Research Discussion Paper Nos. 164 and 165 I presented econometric models of the industrialized countries (North) and the oil-importing developing countries (South). This paper links the two models so that the economic interdependence between North and South can be...