This paper develops a simple model that shows how a country can endogenously become differentiated into an industrialized "core" and an agricultural "periphery." In order to realize scale economies while minimizing transport costs, manufacturing firms tend to locate in the region with larger demand, but the location of demand itself depends on the distribution of manufacturing. Emergence of a core-periphery pattern depends on transportation costs, economies of scale, and the share of manufacturing in national income.The study of economic geography-of the location of factors of production in space-occupies a relatively small part of standard economic analysis. International trade theory, in particular, conventionally treats nations as dimensionless points (and frequently assumes zero transportation costs between countries as well). Admittedly, models descended from von Thunen (1826) play an important role in urban studies, while Hotelling-type models of locational competition get a reasonable degree of attention in industrial organization. On the whole, however, it seems fair to say that the study of economic geography plays at best a marginal role in economic theory.On the face of it, this neglect is surprising. The facts of economic geography are surely among the most striking features of real-world economies, at least to laymen. For example, one of the most remarkable things about the United States is that in a generally sparsely populated country, much of whose land is fertile, the bulk of the population resides in a few clusters of metropolitan areas; a quarter of the inhabitants are crowded into a not especially inviting section of the East Coast. It has often been noted that nighttime satellite
This paper develops a simple model that shows how a country can endogenously become differentiated into an industrialized "core" and an agricultural "periphery." In order to realize scale economies while minimizing transport costs, manufacturing firms tend to locate in the region with larger demand, but the location of demand itself depends on the distribution of manufacturing. Emergence of a core-periphery pattern depends on transportation costs, economies of scale, and the share of manufacturing in national income.The study of economic geography-of the location of factors of production in space-occupies a relatively small part of standard economic analysis. International trade theory, in particular, conventionally treats nations as dimensionless points (and frequently assumes zero transportation costs between countries as well). Admittedly, models descended from von Thunen (1826) play an important role in urban studies, while Hotelling-type models of locational competition get a reasonable degree of attention in industrial organization. On the whole, however, it seems fair to say that the study of economic geography plays at best a marginal role in economic theory.On the face of it, this neglect is surprising. The facts of economic geography are surely among the most striking features of real-world economies, at least to laymen. For example, one of the most remarkable things about the United States is that in a generally sparsely populated country, much of whose land is fertile, the bulk of the population resides in a few clusters of metropolitan areas; a quarter of the inhabitants are crowded into a not especially inviting section of the East Coast. It has often been noted that nighttime satellite
JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Brookings Institution Press is collaborating with JSTOR to digitize, preserve and extend access to Brookings Papers on Economic Activity. It's Baaack: Japan's Slump and the Return of the Liquidity Trap THE LIQUIDITY TRAP-that awkward condition in which monetary policy loses its grip because the nominal interest rate is essentially zero, in which the quantity of money becomes irrelevant because money and bonds are essentially perfect substitutes-played a central role in the early years of macroeconomics as a discipline. John Hicks, in introducing both the IS-LM model and the liquidity trap, identified the assumption that monetary policy is ineffective, rather than the assumed downward inflexibility of prices, as the central difference between Mr. Keynes and the classics. ' It has often been pointed out that the Alice in Wonderland character of early Keynesianism-with its paradoxes of thrift, widows' cruses, and so on-depended on the explicit or implicit assumption of an accommodative monetary policy; it has less often been pointed out that in the late 1930s and early 1940s it seemed quite natural to assume that money was irrelevant at the margin. After all, at the end of the 1930s interest rates were hard up against the zero constraint; the average rate on U.S. Treasury bills during 1940 was 0.014 percent.Since then, however, the liquidity trap has steadily receded both as a memory and as a subject of economic research. In part, this is because in the generally inflationary decades after World War II nominal interest rates have stayed comfortably above zero, and therefore central banks have no longer found themselves "pushing on a string." Also, the experience of the 1930s itself has been reinterpreted, most notably by 1. Hicks (1937). Emphasizing broad aggregates rather than interest rates or the monetary base, Friedman and Schwartz argue, in effect, that the Depression was caused by monetary contraction; that the Federal Reserve could have prevented it; and implicitly, that even the great slump could have been reversed by sufficiently aggressive monetary expansion. To the extent that modern macroeconomists think about liquidity traps at all (the on-line database EconLit lists only twenty-one papers with that phrase in title, subject, or abstract since 1975), their view is basically that a liquidity trap cannot happen, did not happen, and will not happen again.But it has happened, and to the world's second-largest economy. Over the past several years, Japanese money market rates have been consistently below 1 percent, and the Bank of Japan plausibly claims that it can do no more; yet the Japanese economy, which has been stagnant since 1991, is sliding deeper into recession. Since...
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