Changes in the Process of Aging During the Twentieth Century: Findings and Procedures of the Early Indicators Project

Working Paper: NBER ID: w9941

Authors: Robert W. Fogel

Abstract: The program project Early Indicators of Later Work Levels, Disease and Death investigates how socioeconomic and environmental factors in early life can shape health and work levels in later life. Project researchers have approached this problem by creating a life-cycle sample that permits a longitudinal study of the aging of Union Army veterans, the first cohort to reach age 65 during the twentieth century. Comparing Union Army data with data from NHANES and NHIS has shown that age-specific prevalence rates of specific chronic diseases and disabilities were much higher in the century before World War II among both young and old than today. Moreover, the number of comorbidities at each age has fallen sharply. Also, the average age at onset of chronic diseases was more than a decade later at the end of the twentieth century than at the beginning. The implications of these findings for several issues in health economics are discussed.

Keywords: No keywords provided

JEL Codes: I10; I12; J11; J14


Causal Claims Network Graph

Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.


Causal Claims

CauseEffect
improvements in public health and socioeconomic conditions (I14)changes in chronic disease prevalence (I12)
chronic diseases more severe and began earlier (I12)contradicting earlier theories of health transition (I14)
socioeconomic and environmental factors in early life (I14)health and work levels in later life (J26)
improvements in socioeconomic conditions (O15)healthier aging processes (I12)

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