Firm-Productivity and Export under Non-Constant Marginal Costs

Recent theoretical research shows that exporters are more productive than nonexporters. We show that this result holds almost trivially for the case of constant marginal cost of production, as mainly assumed in the literature, but it may not hold true if the marginal cost is not constant. Our result provides a simple explanation for recent empirical evidence showing exporters are less productive than non-exporters.