Sources of U.S. Longevity Increase, 1960 -1997
Between 1960 and 1997, life expectancy at birth of Americans increased approximately 10% „G from 69.7 to 76.5 years „G and it has been estimated that the value of life extension during this period nearly equaled the gains in tangible consumption. While life expectancy has tended to increase, there have been substantial fluctuations in the rate of increase. In this paper we investigate whether an aggregate health production function can help to explain the annual time-series behavior of U.S. longevity since 1960. We view longevity as the output of the health production function, and output fluctuations as the consequence of fluctuations in medical inputs (expenditure) and technology. We estimate longevity models using annual U.S. time-series data on life expectancy, health expenditure, and medical innovation. Reliable annual data are available for only one type of innovation „G new drugs „G but pharmaceutical R&D accounts for a significant fraction of total biomedical research. The empirical analysis provides strong support for the hypothesis that both medical innovation (in the form of new drug approvals) and expenditure on medical care (especially public expenditure) contributed to longevity increase during the period 1960-1997. Increased drug approvals and health expenditure per person jointly explain just about 100% of the observed long-run longevity increase.
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- Lichtenberg Frank R., 2002.
"The Effects of Medicare on Health Care Utilization and Outcomes,"
Forum for Health Economics & Policy,
De Gruyter, vol. 5(1), pages 1-29, January.
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