In this paper, we present a standard quality ladders endogenous growth model with one significant new assumption, that it takes time for firms to learn how to export. We show that this model without Melitz-type assumptions can account for all the evidence that the Melitz (2003) model was...

The availability of rich rm-level data sets has recently led researchers to uncover new evidence on the eects of trade liberalization. First, trade openness forces the least productive firmto exit the market. Secondly, it induces surviving firms to increase their innovation efforts and thirdly,...

The availability of rich ?rm-level data has led researchers to uncover new evidence on the effects of trade liberalization. First, trade openness forces the least productive fi?rms to exit the market; secondly, it induces surviving fi?rms to increase their innovation efforts; thirdly, it...

We investigate the impact of incremental trade liberalization in a dynamic model of endogenous growth with heterogeneous firms and costly trade. Growth originates from horizontal specialization and the steady state productivity growth rate is positive. Innovations require costly R&D and are...

This paper offers a unified framework to explore both the static and dynamic welfare effects of trade and multinational production MP in the presence of firm-specific productivity heterogeneity. The model captures the dynamic effects by allowing for RD spillovers between firms in a framework of...

This paper presents a trade model with firm-level productivity differences and R&D-driven growth. Trade liberalization causes the least productive firms to exit but also slows the development of new products. The overall effect on productivity growth depends on the size of intertemporal...

I study the implications of endogenous productivity choices ("innovation") on the effects of trade liberalization. I find that a model with innovation generates an elasticity of trade volumes to tariff reductions that is fifty percent larger than models without innovation, and consistent in...

We introduce firm and worker heterogeneity into a model of innovation-driven endogenous growth. Individuals who differ in ability sort into either a research sector or a manufacturing sector that produces differentiated goods. Each research project generates a new variety of the differentiated...

This paper tests a geography and growth model using regional data for Europe, the US, and Japan. We set up a standard geography and growth model with a poverty trap and derive a log-linearized growth equation that corresponds directly to a threshold regression technique in econometrics. In...

Division of labor models have become a standard analytical tool, along withcompetitive general equilibrium models (Ricardian, HOS, Ricardo-Viner), in public finance, trade, growth, development, and macroeconomics. Yet unlike the earlier models, specialization models lack a canonical...