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作者：New York University; National Bureau of Economic Research; University of Copenhagen
摘要：Using novel weekly mortality data for London spanning 1866-1965, we analyze the changing relationship between temperature and mortality as the city developed. Our main results show that warm weeks led to elevated mortality in the late nineteenth century, mainly due to infant deaths from digestive diseases. However, this pattern largely disappeared after WWI as infant digestive diseases became less prevalent. The resulting change in the temperature-mortality relationship meant that thousands of...
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作者：Monash University
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作者：University of Colorado System; University of Colorado Boulder
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作者：University of Southern Denmark
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作者：University of Minnesota System; University of Minnesota Twin Cities; University of Minnesota System; University of Minnesota Twin Cities; University of California System; University of California Davis; University of California System; University of California Davis
摘要：Has the golden age of U.S. agricultural productivity growth ended? We analyze the detailed patterns of productivity growth spanning a century of profound changes in American agriculture. We document a substantial slowing of U.S. farm productivity growth, following a late mid-century surge-20 years after the surge and slowdown in U.S. industrial productivity growth. We posit and empirically probe three related explanations for this farm productivity surge-slowdown: the time path of agricultural...
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作者：University of Michigan System; University of Michigan
摘要：The Antebellum American South experienced rapid biological innovation centered around an active market for new cotton seed varieties, despite the absence of intellectual property rights. Contemporaries complained new seed was initially offered at high prices, which subsequently collapsed. Using local newspaper evidence, this paper documents this market's operation. It then rationalizes the price movements given the potential of improved seed to multiply at finite rates. The initial prices were...
