Do theoretical welfare gains from trade translate into aggregate measures of economic activity? We calculate the changes in real GDP and real consumption that result from changes in trade costs in a range of workhorse trade models, following the procedures outlined by statistical agencies in the United States. Our main findings are as follows: First, real GDP and measured aggregate productivity rise in response to reductions in variable trade costs if GDP deflators capture the decline in trade costs. Second, with balanced trade in each country, changes in world real consumption and changes in world real GDP (i.e.: weighting the change in each country by its nominal GDP) in response to changes in variable trade costs coincide, up to a first-order approximation, with changes in world theoretical (welfare-based) consumption. The equivalence between measured consumption and theoretical consumption holds country-by-country under stronger conditions. Third, for given trade shares and changes in variable trade costs, changes in real GDP and changes in world real consumption are approximately equal in magnitude across the models we consider.

We develop a new Measure of Aggregate Trade Restrictions (MATR) using data from the IMF’s Annual Report on Exchange Arrangements and Exchange Restrictions. MATR is an empirical measure of how restrictive official government policy is towards the international flow of goods and services. MATR is simple, ad hoc, plausible, quantitative, easily updated, based solely on policy-relevant measures of trade policy, and covers an unbalanced sample of up to 157 countries annually between 1949 and 2019. MATR is strongly correlated with, but more comprehensive than, existing measures of openness and trade policy existing measures. We use MATR to show that trade restrictions are harmful for the economy and lead to significant contractions in output.

Individuals that consume different baskets of goods are differentially affected by relative price changes caused by international trade. We develop a methodology to measure the unequal gains from trade across consumers within countries that is applicable across countries and time. The approach uses data on aggregate expenditures across goods with different income elasticities and parameters estimated from a non-homothetic gravity equation. We find considerable variation in the pro-poor bias of trade depending on the income elasticity of each country's exports and imports. Non-homotheticities across sectors imply that trade typically favors the poor, who concentrate spending in more traded sectors.

Trade flows and trade policies need to be properly quantified to describe, compare, or follow the evolution of policies between sectors or countries or over time. This is essential to ensure that policy choices are made with an appropriate knowledge of the real conditions. This practical guide introduces the main techniques of trade and trade policy data analysis. It shows how to develop the main indexes used to analyze trade flows, tariff structures, and non-tariff measures. It presents the databases needed to construct these indexes as well as the challenges faced in collecting and processing these data, such as measurement errors or aggregation bias. Written by experts with practical experience in the field, A Practical Guide to Trade Policy Analysis has been developed to contribute to enhance developing countries' capacity to analyze and implement trade policy. It offers a hands-on introduction on how to estimate the distributional effects of trade policies on welfare, in particular on inequality and poverty. The guide is aimed at government experts engaged in trade negotiations, as well as students and researchers involved in trade-related study or research. An accompanying DVD contains data sets and program command files required for the exercises. Copublished by the WTO and the United Nations Conference on Trade and Development

Changing Patterns of Global Trade outlines the factors underlying important shifts in global trade that have occurred in recent decades. The emergence of global supply chains and their increasing role in trade patterns allowed emerging market economies to boost their inputs in high-technology exports and is associated with increased trade interconnectedness.The analysis points to one important trend taking place over the last decade: the emergence of China as a major systemically important trading hub, reflecting not only the size of trade but also the increase in number of its significant trading partners.

This report is about a huge contribution to our deepening understanding of what the global economy really means and how it is changing. The report helpfully distinguishes elements of an economy that are tradable and the large set that are non-tradable. Clearly the tradables set is expanding with the support of enabling technology. The report argues that connectivity in the networks that define the evolving architecture of GVCs is important. This Global Value Chain Development Report is the result of intensive and detailed work in assembling and analyzing data on the structure of economies and on how they are linked. It creates a much clearer picture of evolving patterns of independence. It also presents a much clearer picture of comparative advantage. --Publisher description.

This title provides a comprehensive introduction to the key issues in trade and liberalization of services. Providing a useful overview of the players involved, the barriers to trade, and case studies in a number of service industries, this is ideal for policymakers and students interested in trade.