Footloose Capital, Market Access, and the Geography of Regional State Aid

The global welfare implications of home market effects in trade models with imperfect competition are little understood. This paper proposes a simple model in which such implications can be easily analyzed. It shows an overall tendency of imperfectly competitive sectors to inefficiently cluster in locations that offer market access advantages. The more so the stronger the market power of firms as well as the intensity of increasing returns to scale and the lower the trade costs. As such features are likely to differ widely across sectors, those results provide theoretical ground to the promotion of regional policies that are also sectorspecific and not only region-specific as currently in the EU.economic integration, specialization, home market effect, regional disparities, regional policy, International Relations/Trade, Political Economy, F12, L13, R13,

Footloose Capital, Market Access, and the Geography of Regional State Aid

The global welfare implications of home market effects in trade models with imperfect competition are little understood. This paper proposes a simple model in which such implications can be easily analyzed. It shows an overall tendency of imperfectly competitive sectors to inefficiently cluster in locations that offer market access advantages. The more so the stronger the market power of firms as well as the intensity of increasing returns to scale and the lower the trade costs. As such features are likely to di¤er widely across sectors, those results provide theoretical ground to the promotion of regional policies that are also sector-specific and not only region-specific as currently in the EU.economic integration, specialization, home market effect, regional disparities, regional policy

The Economic Value of Cultural Diversity: Evidence from US Cities

What are the economic consequences to U.S. natives of the growing diversity of American cities? Is their productivity or utility affected by cultural diversity as measured by diversity of countries of birth of U.S. residents? We document in this paper a very robust correlation: US-born citizens living in metropolitan areas where the share of foreign-born increased between 1970 and 1990, experienced a significant increase in their wage and in the rental price of their housing. Such finding is economically significant and survives omitted variable bias and endogeneity bias. As people and firms are mobile across cities in the long run we argue that, in equilibrium, these correlations are consistent only with a net positive effect of cultural diversity on productivity of natives.

Firm Heterogeneity, Contract Enforcement, and the Industry Dynamics of Offshoring

We develop an endogenous growth model to study the long run consequences of offshoring with firm heterogeneity and incomplete contracts. In so doing, we model offshoring as the geographical fragmentation of a firm’s production chain between a home upstream division and a foreign downstream one. On the positive side, we show that, when contracts are incomplete, the possibility of offshoring has favorable implications for economic growth. Yet, offshoring induced by a higher bargaining power of the upstream division can hamper growth: while there is always a positive correlation between upstream bargaining weight and offshoring activities, there is a non-monotonic relationship between these and growth. Whether offshoring with incomplete contracts also increases consumption depends on firm heterogeneity. On the normative side, we show that, whereas with complete contract efficiency is restored through a subsidy to R&D only, with incomplete contracts a production subsidy to offshored upstream divisions is needed too.Offshoring, Heterogeneous Firms, Incomplete Contracts, Growth, Industry Dynamics

Rethinking the Effects of Immigration on Wages

This paper asks the following question: what was the effect of surging immigration on average and individual wages of U.S.-born workers during the period 1990-2004? We emphasize the need for a general equilibrium approach to analyze this problem. The impact of immigrants on wages of U.S.-born workers can be evaluated only by accounting carefully for labor market and capital market interactions in production. Using such a general equilibrium approach we estimate that immigrants are imperfect substitutes for U.S.- born workers within the same education-experience-gender group (because they choose different occupations and have different skills). Moreover, accounting for a reasonable speed of adjustment of physical capital we show that most of the wage effects of immigration accrue to native workers within a decade. These two facts imply a positive and significant effect of the 1990-2004 immigration on the average wage of U.S.-born workers overall, both in the short run and in the long run. This positive effect results from averaging a positive effect on wages of U.S.-born workers with at least a high school degree and a small negative effect on wages of U.S.-born workers with no high school degree.

Special Interests and Technological Change

We study an OLG economy where productivity growth comes from two alternative sources: process innovation and learning-by-doing. There is a trade-off between the two in so far as frequent technological updates reduce the scope for learning on existing technologies. A conflict is shown to arise between the young and the old, because the former favor innovation while the latter prefer learning. We model the interaction between overlapping generations and policy makers as a dynamic common agency problem, where competing generations invest a certain amount of resources to lobby either for the maintenance of the current technology or the adoption of a new one. By focusing on truthful Markov perfect equilibria, we characterize the political equilibrium and show its dependence on the underlying demographic, technological and preference parameters.Technological change, Technology option, Pressure goups, Dynamic common agency

The Economic Value of Cultural Diversity: Evidence from US Cities

We use data on wages and rents in different U.S. cities to assess the amenity effects on production and consumption of cultural diversity as measured by diversity of countries of birth of city residents. We show that US-born citizens living in metropolitan areas where the share of foreign-born increased between 1970 and 1990 have experienced a significant average increase in their wage and in the rental price of their housing. Such finding is economically significant and robust to omitted variable bias and endogeneity bias. We then present a model in which cultural diversity may have both production and consumption amenity or disamenity effects. As people and firms are mobile across cities in the long run, the model implies that the joint results from the wage and rent regressions are consistent with a dominant production amenity effect of cultural diversity.Cultural diversity, Productivity, Local amenities, Urban economics

Rethinking the Effects of Immigration on Wages

This paper asks the following important question: what was the effect of surging immigration on average and individual wages of U.S.-born workers during the period 1990-2004? Building on section VII of Borjas (2003) we emphasize the need for a general equilibrium approach to analyze this problem. The impact of immigrants on wages of US born workers can be evaluated only by accounting carefully for labor market and capital market interactions in production. Using such a general equilibrium approach we estimate that immigrants are imperfect substitutes for U.S.-born workers within the same education and experience group (because they choose different occupations and have different skills). Moreover, accounting for reasonable speed of adjustment of physical capital we show that most of the wage effects of immigration accrue to native workers already within a decade. These two facts, overlooked by the previous literature, imply a positive and significant effect of the 1990-2004 immigration on the average wage of U.S.-born workers overall, both in the short and in the long run. This positive average effect resulted from a positive effect on wages of all US-born workers with at least a high school degree and a small negative effect on wages of U.S born workers with no high school degree.