Robin C. Sickles

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NBER Working Papers and Publications

October 1996Index Number and Factor Demand Approaches to the Estimation of Productivity
with David H. Good, M. Ishaq Nadiri: w5790
In this paper we review a number of analytical methods and issues related to identifying and estimating the source of productivity growth. The two major methods used in measuring productivity growth -- index number and econometric estimation approach -- are briefly discussed. Substantive issues such as the contribution of R&D capital and R&D spillovers, infrastructure capital, allocative distortions, nature of the market structure and technological advancement on productivity growth at various levels of aggregation are examined. The attributes of the static and dynamic factor demand models used to estimate the contribution of different inputs to productivity growth are described and the evaluation of the production process changes in response to exogenous factors and their impact on pr...

Published: Pesaran, H. and P. Schmidt (eds.) Handbook of Applied Econometrics Vol. II-Microeconometrics. Malden, MA: Blackwell Publishers, 1997.

December 1991The Structure of Production, Technical Change and Efficiency in a Multiproduct Industry: An Application to U.S. Airlines
with David H. Good, M. Ishaq Nadiri: w3939
In this paper we construct a short run model of the firm describing the behavior of thirteen U.S. airlines during the difficult transition to deregulation. Several modeling scenarios are developed to assess three common assumptions in cost studies: the use of time as a proxy for technological change as opposed to a more thorough description of changes in the production technique, the assumption of cost minimizing behavior as opposed to permitting allocative inefficiency in input selection, and the assumption exogeneity of output and capital and their characteristics as opposed to endogenous decisions regarding these variables. Derived properties of the resulting eight combinations of these issues are calculated to identify the sensitivity of these properties to the modeling assumptions. Th...
September 1984An Analysis of the Health and Retirement Status of the Elderly
with Paul J. Taubman: w1459
in this paper we specify and estimate a structural limited dependent variable model with which we study both the health and retirement status of the elderly. Standard linear estimators, which assume that these variable sare continuous, are not appropriate and categorical estimation techniques are preferred. Our model differs from previous work in that we have longitudinal data and random effects that are correlated over time for different individuals. The problem is made more complicated because there is sample truncation, which could potentially bias coefficient estimates, since approximately twenty percent of the individuals in our sample die. We outline the full information maximum likelihood estimator for such a model and implement it in our empirical analysis. With our structural esti...

Published: Sickles, Robin C. and Paul J. Taubman. "An Analysis of the Health and Retirnt Status of the Elderly," Econometrica, Vol. 54, No. 6, Nov. 1986, pp. 133 9-1356. citation courtesy of

1983Supplemental Social Insurance and the Health of the Poor
with Paul J. Taubman: w1062
In 1974 the federal government instituted Supplemental Social Insurance(SSI). The eligible group was the elderly on welfare and disabled individuals.The program distributed extra income and made people eligible for Medicaid in all states except Arizona which did not have Medicaid. We used subjective and objective health information in the Retirement History Survey (RHS) to examine the impact of the program. The RHS is a sample that began in 1969 and included heads of households who were 58 to 63 years old. The respondents or widows were resurveyed every second year through 1977. Before 1974 those who subsequently received SSI were in much worse health than those who did not.After1974 the differences in health were small and not statistically significant.
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