Working Papers
Expediting Trade: Impact Evaluation of an In-House Clearance Program (with Ana M. Fernandes and Claudia Berg)
Despite the importance of trade facilitation as an area of trade and development policy, there have been very few impact evaluations of specific trade facilitation reforms. This paper offers an evaluation of in-house clearance, a reform that allows qualified firms in Serbia to clear customs from within their own warehouse rather than at the customs office. The pooled synthetic control method applied here offers a novel solution to many of the empirical challenges that frustrate efforts to evaluate trade facilitation reforms. The method is used to estimate causal impacts on trade outcomes for 21 firms that adopted in-house clearance for import shipments. The program compressed the distribution of clearance times for adopting firms, but the estimated effects on median clearance times, inspection rates, and import value were not statistically significant. Tests for heterogeneous program impact do not indicate that the program affected adopting firms differently. Overall, the results suggest that the most evident benefit of the program for participating firms is reduced uncertainty about clearance times.
Despite the importance of trade facilitation as an area of trade and development policy, there have been very few impact evaluations of specific trade facilitation reforms. This paper offers an evaluation of in-house clearance, a reform that allows qualified firms in Serbia to clear customs from within their own warehouse rather than at the customs office. The pooled synthetic control method applied here offers a novel solution to many of the empirical challenges that frustrate efforts to evaluate trade facilitation reforms. The method is used to estimate causal impacts on trade outcomes for 21 firms that adopted in-house clearance for import shipments. The program compressed the distribution of clearance times for adopting firms, but the estimated effects on median clearance times, inspection rates, and import value were not statistically significant. Tests for heterogeneous program impact do not indicate that the program affected adopting firms differently. Overall, the results suggest that the most evident benefit of the program for participating firms is reduced uncertainty about clearance times.
A Coasian Model of International Production Chains (with Thibault Fally)
World Bank version (ungated version)
Abstract: International supply chains require coordination of numerous activities across multiple countries and firms. We adapt a model of supply chains and apply it to an international trade setting. In each chain, the measure of tasks completed within a firm is determined by transaction costs and the cost of coordinating more activities within the rm. The structural parameters that govern these costs explain variation in supply-chain length and gross-output-to-value-added ratios, and determine countries' comparative advantage along and across supply chains. We calibrate the model to match key observables in East Asia, and evaluate implications of changes in model parameters for trade, welfare, the length of supply chains and countries' relative position within them.
World Bank version (ungated version)
Abstract: International supply chains require coordination of numerous activities across multiple countries and firms. We adapt a model of supply chains and apply it to an international trade setting. In each chain, the measure of tasks completed within a firm is determined by transaction costs and the cost of coordinating more activities within the rm. The structural parameters that govern these costs explain variation in supply-chain length and gross-output-to-value-added ratios, and determine countries' comparative advantage along and across supply chains. We calibrate the model to match key observables in East Asia, and evaluate implications of changes in model parameters for trade, welfare, the length of supply chains and countries' relative position within them.
Trade Effects of Customs Reform: Evidence from Albania (with Ana M. Fernandes and Alejandra Mendoza Alcantara)
Abstract: Despite enormous academic interest in international trade costs and keen policy interest in efforts to mitigate them, so far there is very little hard evidence on the impacts of trade facilitation efforts. This paper exploits a dramatic reduction in the rate of physical inspections by Albanian customs to estimate the effects of fewer inspection-related delays on the level and composition of imports. In this setting, the paper finds evidence that the expected median number of days spent in Albanian customs falls by 7 percent when the probability that a shipment is inspected falls from 50 percent or more to under 50 percent. In turn, this reduction in time produces a 7 percent increase in import value. The paper finds evidence that the reforms favored imports from preferential trading partners, especially the European Union. There are also reform-induced changes in the composition of trade, including increases in average quantities and unit prices, the number of shipments, and the number of importing firms per product-country pair and the number of countries per firm-product pair. A back-of-the-envelope calculation suggests that the estimate of 7 percent import growth along an intensive margin is roughly consistent with a 0.36 percentage point reduction in average tariff equivalent trade costs. Applying this figure to the value of Albania's non-oil imports produces a reform-induced trade cost savings estimate of approximately US$12 million in 2012.
Abstract: Despite enormous academic interest in international trade costs and keen policy interest in efforts to mitigate them, so far there is very little hard evidence on the impacts of trade facilitation efforts. This paper exploits a dramatic reduction in the rate of physical inspections by Albanian customs to estimate the effects of fewer inspection-related delays on the level and composition of imports. In this setting, the paper finds evidence that the expected median number of days spent in Albanian customs falls by 7 percent when the probability that a shipment is inspected falls from 50 percent or more to under 50 percent. In turn, this reduction in time produces a 7 percent increase in import value. The paper finds evidence that the reforms favored imports from preferential trading partners, especially the European Union. There are also reform-induced changes in the composition of trade, including increases in average quantities and unit prices, the number of shipments, and the number of importing firms per product-country pair and the number of countries per firm-product pair. A back-of-the-envelope calculation suggests that the estimate of 7 percent import growth along an intensive margin is roughly consistent with a 0.36 percentage point reduction in average tariff equivalent trade costs. Applying this figure to the value of Albania's non-oil imports produces a reform-induced trade cost savings estimate of approximately US$12 million in 2012.
Policy and Performance in Customs: Evaluating the Trade Facilitation Agreement (with Xiaohui Zhang)
Abstract: The 2013 World Trade Organization ministerial in Bali produced a comprehensive framework agreement on trade facilitation. If fully implemented, the agreement should increase the speed and reduce the cost of moving goods across international borders. But which reforms are most likely to improve these outcomes, how much improvement should be expected, and what might such improvements be worth? This paper adopts the Organisation for Economic Co-operation and Development's trade facilitation indicators as quantitative descriptions of trade facilitation policy. It estimates the impact of the indicators and other variables on the time necessary to clear customs, the associated cost, and a customs performance index. Of the 12 policy bundles, the good governance and impartiality indicator is most clearly related to customs clearance time. A move to best practice in all policies by all World Trade Organization members would reduce the predicted time spent in customs by an average of 1.6 days for imports and 2 days for exports. Using a conservative estimate of the value of time in trade, such comprehensive reforms imply a mean tariff equivalent reduction of 0.9 percentage points on imports and 1.2 percentage points on exports. The same estimates are used to calculate welfare gains of policy reform by World Trade Organization members. Reform in China alone accounts for roughly one-fourth of the global benefits from the Trade Facilitation Agreement.
Abstract: The 2013 World Trade Organization ministerial in Bali produced a comprehensive framework agreement on trade facilitation. If fully implemented, the agreement should increase the speed and reduce the cost of moving goods across international borders. But which reforms are most likely to improve these outcomes, how much improvement should be expected, and what might such improvements be worth? This paper adopts the Organisation for Economic Co-operation and Development's trade facilitation indicators as quantitative descriptions of trade facilitation policy. It estimates the impact of the indicators and other variables on the time necessary to clear customs, the associated cost, and a customs performance index. Of the 12 policy bundles, the good governance and impartiality indicator is most clearly related to customs clearance time. A move to best practice in all policies by all World Trade Organization members would reduce the predicted time spent in customs by an average of 1.6 days for imports and 2 days for exports. Using a conservative estimate of the value of time in trade, such comprehensive reforms imply a mean tariff equivalent reduction of 0.9 percentage points on imports and 1.2 percentage points on exports. The same estimates are used to calculate welfare gains of policy reform by World Trade Organization members. Reform in China alone accounts for roughly one-fourth of the global benefits from the Trade Facilitation Agreement.
In Progress
“Formalizing Risk Management in Border Inspection” (with Bilgehan Karabay)
“Formalizing Risk Management in Border Inspection” (with Bilgehan Karabay)