To analyze the effects of prospective policy changes, sectoral and economy-wide modelers need to begin with baseline estimates of policy induced price distortions. Global trade modelers mostly use the Global Trade Analysis Project (GTAP) protection database, which currently relies heavily on...

We provide an overview of several approaches to modeling market structure in multisector general equilibrium (MSGE) models, including both oligopoly and monopolistic competition. We emphasize open economy models and applications to international economic policy. We map out practical strategies...

This survey concludes that including agriculture in the negotiations was particularly important economically. Although agricultural exports are less than 10% of merchandise trade, the high and variable protection in this sector appears to account for the majority of the cost of distortions in...

For individual countries, variable trade barriers can be used to reduce the volatility of domestic relative to world prices. If this is done by countries accounting for a large share of the market, its effect is offset by increases in world price volatility. This study shows the nature of the...

The outlines of a potential agreement, emerging after seven years of negotiations, imply that Doha offers three key potential benefits: reduced uncertainty of market access in goods and services; improved market access in agriculture and manufacturing; and the mobilization of resources to deal...

Many trade negotiations involve large cuts in high tariffs, while allowing smaller cuts for an agreed share of politically sensitive products. The effects of these flexibilities on market access opportunities are difficult to predict, creating particular problems for developing countries in...

The financial crisis arose in the industrial countries, but has affected developing countries through higher interest rates, sharp changes in commodity prices, and reductions in investment, trade, migration and remittances. For most low-income countries, shocks that affect food prices or wage...

Trade policy reforms in recent decades have sharply reduced the distortions that were harming agriculture in developing countries, yet global trade in farm products continues to be far more distorted than trade in nonfarm goods. Those distortions reduce some forms of poverty and inequality but...