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Author: Philipson, Tomas

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1.	Ahituv, Avner Hotz, V. Joseph Philipson, Tomas
1.	The Responsiveness of the Demand for Condoms to the Local Prevalence of AIDS Journal of Human Resources 31,4 (Fall 1996): 869-897. Also: http://www.jstor.org/stable/146150 Cohort(s): NLSY79 Publisher: University of Wisconsin Press Keyword(s): Contraception; Epidemiology; Residence; Sexual Activity; Sexual Behavior This paper investigates the degree to which the local prevalence of AIDS increases the demand for disease-preventing methods of contraception among young adults. Using data from the National Longitudinal Survey of Youth (NLSY-1979), we find substantial evidence that the use of condoms was quite responsive to the prevalence of AIDS in one's state of residence and this responsiveness has been increasing over time. We present both cross-sectional and longitudinal evidence estimating that a 1 percent increase in the prevalence of AIDS increases the propensity to use a condom significantly and up to 50 percent for the most prevalence-responsive groups. Our findings tend support to the existence of a self-limiting incentive effect of epidemics--an effect that tends to be ignored in epidemiological theories of the spread of infectious diseases. [Copyright Board of Regents of the University of Wisconsin System 1996]
	Bibliography Citation Ahituv, Avner, V. Joseph Hotz and Tomas Philipson. "The Responsiveness of the Demand for Condoms to the Local Prevalence of AIDS." Journal of Human Resources 31,4 (Fall 1996): 869-897.

2.	Lakdawalla, Darius N. Philipson, Tomas
2.	Labor Supply and Weight Journal of Human Resources 42,1 (Winter 2007): 85-116. Also: http://www.jstor.org/stable/40057299 Cohort(s): NLSY79 Publisher: University of Wisconsin Press Keyword(s): Body Mass Index (BMI); Exercise, On-the-job; Health Factors; Job Characteristics; Labor Supply; Occupations; Weight We use panel data from the National Longitudinal Survey of Youth to investigate on-the-job exercise and weight. For male workers, job-related exercise has causal effects on weight, but for female workers, the effects seem primarily selective. A man who spends 18 years in the most physical fitness-demanding occupation is about 25 pounds (14 percent) lighter than his peer in the least demanding occupation. These effects are strongest for the heaviest quartile of men. Conversely, a male worker spending 18 years in the most strength-demanding occupation is about 28 pounds (15 percent) heavier than his counterpart in the least demanding job. [ABSTRACT FROM AUTHOR] Copyright of Journal of Human Resources is the property of University of Wisconsin Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts)
	Bibliography Citation Lakdawalla, Darius N. and Tomas Philipson. "Labor Supply and Weight." Journal of Human Resources 42,1 (Winter 2007): 85-116.

3.	Lakdawalla, Darius N. Philipson, Tomas
3.	The Growth of Obesity and Technological Change: A Theoretical and Empirical Examination NBER Working Paper No. 8946, National Bureau of Economic Research, May, 2002. Also: http://papers.nber.org/papers/W8946 Cohort(s): NLSY79 Publisher: National Bureau of Economic Research (NBER) Keyword(s): Income; Job Characteristics; Obesity; Technology/Technological Changes; Weight This paper provides a theoretical and empirical examination of the long-run growth in weight over time. We argue that technological change has induced weight growth by making home- and market-production more sedentary and by lowering food prices through agricultural innovation. We analyze how such technological change leads to unexpected relationships among income, food prices, and weight. Using individual-level data from 1976 to 1994, we then find that such technology-based reductions in food prices and job-related exercise have had significant impacts on weight across time and populations. In particular, we find that about forty percent of the recent growth in weight seems to be due to agricultural innovation that has lowered food prices, while sixty percent may be due to demand factors such as declining physical activity from technological changes in home and market production.
	Bibliography Citation Lakdawalla, Darius N. and Tomas Philipson. "The Growth of Obesity and Technological Change: A Theoretical and Empirical Examination." NBER Working Paper No. 8946, National Bureau of Economic Research, May, 2002.

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