How do signatures required for exporting and business registration procedures affect the volume and composition of country's exports? To answer this question, I develop a model where a country can export two types of products: differentiated and homogeneous. I show that export signatures and...

Anglophone African countries have been implementing reform and modernization initiatives in their Customs administrations. This paper outlines the progression of key reform and modernization initiatives in these countries since the early 1990s, and assesses the gap between these reforms and...

This paper analyzes export performance in the Middle East and North Africa (MENA) using a gravity model applied to panel data. It addresses two questions: (i) are there significant unexploited export markets for the MENA region?; and (ii) have integration efforts with the EU since the mid-1990s...

This paper provides a framework for understanding trade patterns in the Mashreq. An augmented gravity model is used to compare actual with expected levels of trade. Trade barriers, political uncertainty, and over-appreciation of domestic currencies seem to explain low levels of international...

Trade theories covering Preferential Trade Agreements (PTAs) are as diverse as the literature in search of their empirical support. To account for the model uncertainty that surrounds the validity of the competing PTA theories, we introduce Bayesian Model Averaging (BMA) to the PTA literature....

In most macroeconomic models, the substitutability between domestic and foreign goods is calibrated using aggregated data. This imposes homogeneous elasticities across goods, and the calibration is only valid under this assumption. If elasticities are heterogeneous, the aggregate...

This paper analyzes whether uniform tariffs give rise to the highest welfare compared with tariffs that either escalate or de-escalate along the value chain of production. We show that countries may be better off with de-escalating tariffs where tariff rates are higher on intermediate inputs and...