Early Indicators of Later Work Levels, Disease, and Death
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This paper summarizes a collaborative project designed to create a public-use tape suitable for a prospective study of aging among a random sample of 39,616 men mustered into 331 companies of the Union Army. The aim of the project is to measure the effect of socioeconomics and biomedical factors
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美国国家经济研究局创建时间：
1992-06-01
