Summary of content:The author thinks，“Once is not enough” – Economic treatises only study one event，Not enough to make a valid generalization。Economics can learn a lot from natural experiments，And if the frequency of natural experiments is increased，The harvest will be much more。This article provides a comparative app bet365 download for observing two important periods of de-globalization after the Great Depression of the 1930s and the financial crisis of 2008-2009。The article discusses the similarities and differences between the two events，Provides empirical research results on factors related to deglobalization，Including political system (system)、Economic development level (gross domestic product per capita) and the proportion of manufacturing trade in imports。The author’s empirical analysis uses unbalanced panel data to explore the large number of cross-country changes in the process of deglobalization，These data include 31 economies in the 1930s，111-143 economies in the first decade of the 21st century，Research involves the degree of deglobalization during the collapse period of individual countries’ import trade (the process of change from peak to trough)。〔Carambola Translation〕

Peter A.G. Van Bergeijk），Professor of International Economics and Macroeconomics at the Institute for International Social Studies (ISS), Erasmus University in The Hague, the Netherlands，Research interest is app bet365 download diplomacy、app bet365 download Sanctions、Social Impact、Research synthesis、Meta-analysis and replication。Latest books include: "Earth Economics: Demand Management、Introduction to Long-term Growth and Global app bet365 download Governance" (Cheltenham: Edward Elgar,2013）。In addition，The "Research Handbook of app bet365 download Diplomacy" co-edited with Selwyn Moons will be published by Edward Elgar Company in 2017。Van Bergjic is also a printmaker (http://www.peeter.nl）。Email: Bergeijk@iss.nl