Economic integration in Europe has had ambiguous effects on industry concentration. The literature has proposed various explanations of the empirical findings. The present paper provides an additional theoretical argument. We show that in a world of monopolistic competition, integration in it...

A correct parametric approximation of the productivity distribution is essential to calculate Gains From Trade (GFT) in heterogeneous firms models. This paper argues that heterogeneity in productivity is best captured by Finite Mixture Models (FMMs). FMMs build on the existence of unobserved...

This paper emphasizes the importance of two sufficient statistics to characterize firm-level heterogeneity in the workhorse heterogeneous firms trade model: the Cumulative Distribution Function (CDF) and the mean of firm-level sales. Contradicting the strong focus on the CDF, a close fit to...

This paper studies how cross-sector strategic trade policy affects wages, country-wide profits, and welfare. I develop a simple model of two-country continuum-of-sectors general oligopolistic equilibrium. Demands are linear and sectors involve one domestic firm competing on quantity with its...

We construct a simple model to demonstrate how the firm-level degree of scale economies (D-SE) is determined when firms make technology choice. In particular, we illustrate the importance of external factors that affect the efficiency of firms' technology choice, such as public knowledge stock,...

This paper quantifies the separate contribution of idiosyncratic productivity and demand growth on aggregate Chinese exports. We develop firm, product, market and year specific measures of productivity and demand. We use these measures to document a number of novel findings that distinguish the...

This paper quantifies the separate contribution of idiosyncratic productivity and demand growth on aggregate Chinese exports. We develop firm, product, market and year specific measures of productivity and demand. We use these measures to document a number of novel findings that distinguish the...

This paper quantifies the separate contribution of idiosyncratic productivity and demand growth on aggregate Chinese exports. We develop firm, product, market and year specific measures of productivity and demand. We use these measures to document a number of novel findings that distinguish the...