Agricultural Improvements and Access to Rail Transportation: The American Midwest as a Test Case, 1850-1860
收藏NBER2009-11-01 更新2025-01-04 收录
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https://www.nber.org/papers/w15520
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资源简介：
During the 1850s, land in U.S. farms surged by more than 100 million acres while almost 50 million acres of land were transformed from their raw, natural state into productive farmland. The time and expense of transforming this land into a productive resource represented a significant fraction of
提供机构：
美国国家经济研究局
创建时间：
2009-11-01
