John R. Moran
604 Ford Building
Department of Health Policy and Administration
Pennsylvania State University
University Park PA 16802
Institutional Affiliation: Pennsylvania State University
NBER Working Papers and Publications
|June 2008||The Impact of Income on the Weight of Elderly Americans|
with John Cawley, Kosali I. Simon: w14104
This paper tests whether income affects the body weight and clinical weight classification of elderly Americans using a natural experiment that led otherwise identical retirees to receive significantly different Social Security payments based on their year of birth. We exploit this natural experiment by estimating models of instrumental variables using data from the National Health Interview Surveys. The model estimates rule out even moderate effects of income on weight and on the probability of being underweight or obese, especially for men.
Published: Cawley, John, John Moran, and Kosali Simon. “The Impact of Income on the Weight of Elderly Americans.” Health Economics, 2010, 19(8): 979-993. citation courtesy of
|January 2005||Income and the Use of Prescription Drugs by the Elderly: Evidence from the Notch Cohorts|
with Kosali Ilayperuma Simon: w11068
We use exogenous variation in Social Security payments created by the Social Security benefits notch to estimate how retirees' use of prescription medications responds to changes in their incomes. In contrast to estimates obtained using ordinary least squares, instrumental variables estimates based on the notch suggest that lower-income retirees exhibit considerable income sensitivity in their use of prescription drugs. Our estimates are potentially useful for thinking about the health care usage implications of any changes in transfer payments to the elderly that may occur in the future, and for evaluating the benefits of the recently enacted Medicare prescription drug benefit.
Published: Moran, J. and K. Simon 2006. “Income and the Use of Prescription Drugs by the Elderly: Evidence from the Notch Cohorts.” Journal of Human Resources 41, 2 (February 2006): 411–432.