We present a gravity model that accounts for multilateral resistance, firm heterogeneity and country-selection into trade, while accommodating asymmetries in trade flows. A new equation for the proportion of exporting firms takes a gravity form, such that the extensive margin is also affected by...

How are the dynamics of foreign and domestic sales correlated at the firm level? The question is relevant in that the sign of the correlation shapes the international transmission of shocks and the effects of policy measures. From a theoretical perspective, the correlation could be either zero,...

The recent literature on firm-to-firm trade has documented salient empirical regularities of the buyer-seller network. We propose a simplistic re-interpretation of the classical Krugman (1980) model that accounts for surprisingly many of the empirical regularities. This re-interpretation relies...

I develop a theory of risk diversification through geography. In a general equilibrium trade model with monopolistic competition, characterized by stochastic demand, risk-averse entrepreneurs exploit the spatial correlation of demand across countries to lower the variance of their global sales....

The recent literature on firm-to-firm trade has documented salient empirical regularities of the buyer-seller network. We propose a simplistic re-interpretation of the classical Krugman (1980) model that accounts for surprisingly many of the empirical regularities. This re-interpretation relies...

I develop a theory of risk diversification through geography. In a general equilibrium trade model with monopolistic competition, characterized by stochastic demand, risk-averse entrepreneurs exploit the spatial correlation of demand across countries to lower the variance of their global sales....

We develop a model of international trade with two sources of firm heterogeneity: "productivity" and "caliber". Productivity is modeled as is standard in the literature. Caliber is the ability to produce quality using few fixed inputs. While there is no quality restriction to sell domestically,...

We develop a model of international trade with export quality requirements and two dimensions of rm heterogeneity. In addition to \productivity", rms are also heterogeneous in their \caliber" { the ability to produce quality using fewer xed inputs. Compared to single-attribute models of rm...

We develop a model of international trade with export quality requirements and two dimensions of firm heterogeneity. In addition to "productivity", firms are also heterogeneous in their "caliber" {the ability to produce quality using fewer fixed inputs. Compared to singleattribute models of firm...

We develop a model of international trade with two dimensions of firm heterogeneity and export quality constraints that manifest as higher variable trade costs for lower quality firms. In addition to "productivity", firms are also heterogeneous in their "caliber" -- the ability to develop...