NBER Publications by Tibor Besedes

We investigate and compare countries' export growth based on their performance at the extensive and intensive export margins. Our empirical approach is motivated by an extension to the Melitz (2003) model of heterogeneous firms in which exporters are subject to a one-time sunk cost and also a per-period fixed cost. With imperfect information a firm may enter export markets but shortly exit when it learns its per- period fixed costs. We apply this insight to disaggregated export data and confirm that indeed most export relationships are very short lived. We then show that the survival issue is a significant factor in explaining differences in long run export performance. We find that developing countries would experience significantly higher export growth if they were able to improve their ...

We examine the extent that product differentiation affects the duration of US import trade relationships. Applying nonparametric and semiparametric techniques to highly disaggregated product-level data we estimate that the hazard rate is at least 18 percent higher for homogenous goods than for differentiated products. Put another way, the median survival time for trade relationships involving differentiated products is five years as compared to two years for homogenous products. We find that our results are not only highly robust but often are strengthened under alternative specifications. For instance, if we define trade relationships using industry-level rather than product-level data we find that the hazard rate is 30-35 percent higher for homogenous goods than for differentiated produc...

This paper employs survival analysis to study the duration of US imports. We find that the median duration of exporting a product to the US is very short, on the order to two to four years. Our results also indicate that there is negative duration dependence meaning that if a country is able to survive in the exporting market for the first few years it will face a very small probability of failure and will export the product for a long period of time. This result holds across countries and industries. We find that our results are not only robust to aggregation but are strengthened by aggregation. That is, as we aggregate from product level trade data to SITC industry level trade data the estimated survival increases. We rank countries by their survival experience and show that our rankings...