The Role of Public Health Improvements in Health Advances: The 20th Century United States
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Mortality rates in the US fell more rapidly during the late 19th and early 20th Centuries than any other period in American history. This decline coincided with an epidemiological transition and the disappearance of a mortality "penalty" associated with living in urban areas. There is little
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美国国家经济研究局创建时间：
2004-05-01
