A country's rise to economic dominance tends to be accompanied by its currency becoming a reference point, with other currencies tracking it implicitly or explicitly. For a sample comprising emerging-market economies, we show that in the last three years, the renminbi (RMB) has increasingly become a reference currency, which we define as one that exhibits a high degree of co-movement with other currencies. In East Asia, there is already a RMB bloc, because the RMB has become the dominant reference currency, eclipsing the US dollar, which is a historic development. In this region, 7 currencies out of 10 co-move more closely with the RMB than with the dollar, with the average value of the co-movement coefficient relative to the RMB being about 60 percent greater than that for the dollar. We find that co-movements with a reference currency, especially for the RMB, are associated with trade integration. We draw some lessons for the prospects for the RMB bloc to move beyond Asia based on a comparison of the RMB's situation today and that of the Japanese yen in the early 1990s. If trade were the sole driver, a more global RMB bloc could emerge by the mid-2030s, but complementary reforms of the financial and external sectors could considerably expedite the process. JEL Codes: F31, F33

Th is publication has been subjected to a prepublication peer review intended to ensure analytical quality. Th e views expressed are those of the authors. Th is publication is part of the overall program of the Peterson Institute for International Economics, as endorsed by its Board of Directors, but it does not necessarily refl ect the views of individual members of the Board or of the Institute's staff or management. Th e Institute is an independent, private, nonprofi t institution for rigorous, intellectually honest study and open discussion of international economic policy. Its work is made possible by fi nancial support from a highly diverse group of philanthropic foundations, private corporations, and interested individuals, as well as by income on its capital fund.

Th is paper describes seven salient features of trade integration in the 21st century: Trade integration has been more rapid than ever (hyperglobalization); it is dematerialized, with the growing importance of services trade; it is democratic, because openness has been embraced widely; it is criss-crossing because similar goods and investment fl ows now go from South to North as well as the reverse; it has witnessed the emergence of a mega-trader (China), the fi rst since Imperial Britain; it has involved the proliferation of regional and preferential trade agreements and is on the cusp of mega-regionalism as the world's largest traders pursue such agreements with each other; and it is impeded by the continued existence of high barriers to trade in services. Going forward, the trading system will have to tackle three fundamental challenges: In developed countries, the domestic support for globalization needs to be sustained in the face of economic weakness and the reduced ability to maintain social insurance mechanisms. Second, China has become the world's largest trader and a major benefi ciary of the current rules of the game. It will be called upon to shoulder more of the responsibilities of maintaining an open system. Th e third challenge will be to prevent the rise of mega-regionalism from leading to discrimination and becoming a source of trade confl icts. We suggest a way forward-including new areas of cooperation such as taxes-to maintain the open multilateral trading system and ensure that it benefi ts all countries.JEL Codes: F42, F15, F60, F68

A country's rise to economic dominance tends to be accompanied by its currency becoming a reference point, with other currencies tracking it implicitly or explicitly. For a sample comprising emerging-market economies, we show that in the last three years, the renminbi (RMB) has increasingly become a reference currency, which we define as one that exhibits a high degree of co-movement with other currencies. In East Asia, there is already a RMB bloc, because the RMB has become the dominant reference currency, eclipsing the US dollar, which is a historic development. In this region, 7 currencies out of 10 co-move more closely with the RMB than with the dollar, with the average value of the co-movement coefficient relative to the RMB being about 60 percent greater than that for the dollar. We find that co-movements with a reference currency, especially for the RMB, are associated with trade integration. We draw some lessons for the prospects for the RMB bloc to move beyond Asia based on a comparison of the RMB's situation today and that of the Japanese yen in the early 1990s. If trade were the sole driver, a more global RMB bloc could emerge by the mid-2030s, but complementary reforms of the financial and external sectors could considerably expedite the process. JEL Codes: F31, F33

Th is book was originally published in French in 2020, by Agence française de developpement, under the title Les systèmes agroalimentaires en Afrique: repenser le rôle des marchés. In case of discrepancies, the French-language version will govern.Th is work is a product of the staff of Th e World Bank with external contributions. Th e fi ndings, interpretations, and conclusions expressed in this work do not necessarily refl ect the views of Th e World Bank, its Board of Executive Directors, or the governments they represent, or Agence française de développement. Th e World Bank does not guarantee the accuracy of the data included in this work and does not assume responsibility for any errors, omissions, or discrepancies in the information, or liability with respect to the use of or failure to use the information, methods, processes, or conclusions set forth. The boundaries, colors, denominations, and other information shown on any map in this work do not imply any judgment on the part of Th e World Bank concerning the legal status of any territory or the endorsement or acceptance of such boundaries.Nothing herein shall constitute or be considered to be a limitation upon or waiver of the privileges and immunities of Th e World Bank, all of which are specifi cally reserved.