The Melitz model highlights the importance of the extensive margin (the number of firms exporting) for trade flows. Using the World Bank’s Exporter Dynamics Database (EDD) featuring firm-level exports from 50 countries, we find that around 50 percent of variation in exports is along the extensive margin—a quantitative victory for the Melitz framework. The remaining 50 percent on the intensive margin (exports per exporting firm) contradicts a special case of Melitz with Pareto-distributed firm productivity, which has become a tractable benchmark. This benchmark model predicts that, conditional on the fixed costs of exporting, all variation in exports across trading partners should occur on the extensive margin. We find that moving from a Pareto to a lognormal distribution allows the Melitz model to match the role of the intensive margin in the EDD. We use likelihood methods and the EDD to estimate a generalized Melitz model with a joint lognormal distribution for firm-level productivity, fixed costs and demand shifters, and use “exact hat algebra” to quantify the effects of a decline in trade costs on trade flows and welfare in the estimated model. The welfare effects turn out to be quite close to those in the standard Melitz-Pareto model when we choose the Pareto shape parameter to fit the average trade elasticity implied by our estimated Melitz-lognormal model, although there are significant differences regarding the effects on trade flows.

The Melitz model highlights the importance of the extensive margin (the number of firms exporting) for trade flows. Using the World Bank's Exporter Dynamics Database (EDD) featuring firm-level exports from 50 countries, we find that around 50% of variation in exports is along the extensive margin -- a quantitative victory for the Melitz framework. The remaining 50% on the intensive margin (exports per exporting firm) contradicts a special case of Melitz with Pareto-distributed firm productivity, which has become a tractable benchmark. This benchmark model predicts that, conditional on the fixed costs of exporting, all variation in exports across trading partners should occur on the extensive margin. We find that moving from a Pareto to a lognormal distribution allows the Melitz model to match the role of the intensive margin in the EDD. We use likelihood methods and the EDD to estimate a generalized Melitz model with a joint lognormal distribution for firm-level productivity, fixed costs and demand shifters, and use "exact hat algebra" to quantify the effects of a decline in trade costs on trade flows and welfare in the estimated model. The welfare effects turn out to be quite close to those in the standard Melitz-Pareto model when we choose the Pareto shape parameter to fit the average trade elasticity implied by our estimated Melitz-lognormal model, although there are significant differences regarding the effects on trade flows.

The Melitz model highlights the importance of the extensive margin (the number of firms exporting) for trade flows. Using the World Bank's Exporter Dynamics Database (EDD) featuring firm-level exports from 50 countries, we find that around 50% of variation in exports is along the extensive margin -- a quantitative victory for the Melitz framework. The remaining 50% on the intensive margin (exports per exporting firm) contradicts a special case of Melitz with Pareto-distributed firm productivity, which has become a tractable benchmark. This benchmark model predicts that, conditional on the fixed costs of exporting, all variation in exports across trading partners should occur on the extensive margin. We find that moving from a Pareto to a lognormal distribution allows the Melitz model to match the role of the intensive margin in the EDD. We use likelihood methods and the EDD to estimate a generalized Melitz model with a joint lognormal distribution for firm-level productivity, fixed costs and demand shifters, and use "exact hat algebra" to quantify the effects of a decline in trade costs on trade flows and welfare in the estimated model. The welfare effects turn out to be quite close to those in the standard Melitz-Pareto model when we choose the Pareto shape parameter to fit the average trade elasticity implied by our estimated Melitz-lognormal model, although there are significant differences regarding the effects on trade flows.

International trade is vital in today’s world; international trade can be affected by a number of issues such as terrorism, economic crises, and pandemics such as COVID-19. It is crucial to understand the impact these global issues have on international trade and what happens to trade when global issues arise. A comprehensive guide of these issues is needed to provide background and understanding about international trade and its relationship with global issues. Global issues occasionally dominate a continuing theme of the international globalized world: global crises, war, security issues, global pandemics such as COVID-19, and trade wars. Global cooperation is required to solve such problems. Economically intellectual thinking will enable the development of guiding policies in solving these global problems. In this book, the effects of global issues on international trade will be evaluated, and policy recommendations will be made for the solution of the global issues. Impact of Global Issues on International Trade is a critical reference source that uses analytic research to analyze the effects of global economic and financial crises as well as global health crises and their impact on international trade. Pandemics such as the COVID-19 pandemic, the global economic crisis, and trade wars are discussed, and political suggestions are made to mitigate negative impacts. Covering a wide range of topics such as financial fragility and trade fairs, it is ideal for trade specialists, policymakers, government officials, managers, executives, economists, academicians, researchers, students, and industry professionals.

World trade evolves at two margins. Where a bilateral trading relationship already exists it may increase through time (intensive margin). But trade may also increase if a trading bilateral relationship is newly established between countries that have not traded with each other in the past (extensive margin). We provide an empirical dissection of post-World-War-II growth in manufacturing world trade along these two margins. We propose a corner-solutions-versionʺ of the gravity model to explain movements on both margins. A Tobit estimation of this model resolves the so-called distance-puzzleʺ. It also finds more convincing evidence than recent literature that WTO-membership enhances trade.

Research Paper (postgraduate) from the year 2010 in the subject Business economics - Trade and Distribution, course: Technical-paper/ Private research, language: English, abstract: This paper explores the extent to which products and product-markets diversifications contribute to export growth. It has used the bilateral trade at a very detailed level across countries, between 1996 and 2008. The results suggest that the export growth comes mainly from the intensive margin, i.e. product lines that had been already exported to the existing established trading partners. The decline in export, either due to the fall or the extinction in the existing established trade relationships, occurs more substantially on export growth for developed countries than for developing countries. And the appearance of new exports (extensive margin), either new products or markets, represents a vital source in export earnings for the developing countries, especially for the least developed countries (LDCs).