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作者：Hohenberg, Paul M.
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作者：Duke University
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作者：University of Michigan System; University of Michigan; University of Michigan System; University of Michigan
摘要：Farms stood at an ecological frontier in the 1930s. With new and better agricultural machinery, more farms than ever before made the leap to thousand acre enterprises, But did they abandon mixed husbandry in the process? This article explores the origins of the modem relationship between scale and diversity using a new sample of Kansas farms. In 25 townships across the state, between 1875 and 1940, the evidence demonstrates that relatively few plains farms were agents of early monoculture. Rat...
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作者：Pompeu Fabra University
摘要：Investment in machinery is a key component in the analysis of long-term economic growth during the spread of industrialization. This article offers consistent annual series on the magnitude of machinery imports per capita into all Latin American countries for the period 1890-1930. Analysis of these series shows that machinery imports diverged across countries from 1890 through 1913. After 1913 a number of the more backward countries experienced rapid growth in machinery imports. These large di...
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作者：University of London; London School Economics & Political Science
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作者：University of Oxford
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作者：University of California System; University of California Davis
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作者：Washington University (WUSTL)
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作者：University of London; London School Economics & Political Science
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作者：University of Oxford; Eberhard Karls University of Tubingen
摘要：Age data frequently display excess frequencies at attractive numbers, such as multiples of five. We use this age heaping to measure cognitive ability in quantitative reasoning, or numeracy. We construct a database of age heaping estimates with exceptional geographic and temporal coverage, and demonstrate a robust correlation of literacy and numeracy, where both can be observed. Extending the temporal and geographic range of our knowledge of human capital, we show that Western Europe had alread...
