Estimating an Earnings Function from Coarsened Data by an Interval Censored Regression Procedure
This paper estimates an earnings function where the dependent variable is a mix of point and interval data using an interval regression model based on a pseudo-maximum likelihood estimation procedure. The analysis uses the 1999 OHS, and takes into account point and interval income observations, as well as design features of the survey including stratification, clustering and weights. In developing and applying the methodology, it is shown that researchers interested in analysing the determinants of income in a meaningful way need not be hampered by the presence of both point and interval observations, and can in fact account for these simultaneously using a generalised Tobit model. By incorporating survey design features into the analysis of the variance, some changes were needed to the estimation procedure and this is where the pseudo-likelihood becomes useful. However, this then affects how the coefficients of the model are interpreted, and researchers are encouraged to focus attention on the confluence of these factors.
|Date of creation:||Feb 2005|
|Date of revision:|
|Publication status:||Published in Working Paper Series by the Development Policy Research Unit, February 2005, pages 1-19|
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- P. G. Moll, 1993. "Black South African Unions: Relative Wage Effects in International Perspective," ILR Review, Cornell University, ILR School, vol. 46(2), pages 245-261, January.
- T. Paul Schultz & Germano Mwabu, 1997.
"Labor Unions and the Distribution of Wages and Employment in South Africa,"
776, Economic Growth Center, Yale University.
- T. Paul Schultz & Germano Mwabu, 1998. "Labor Unions and the Distribution of Wages and Employment in South Africa," ILR Review, Cornell University, ILR School, vol. 51(4), pages 680-703, July.
- Schultz, T.P. & Mwabu, G., 1997. "Labor Unions and the Distribution of Wages and Employment in South Africa," Papers 776, Yale - Economic Growth Center.
- Oaxaca, Ronald, 1973. "Male-Female Wage Differentials in Urban Labor Markets," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 14(3), pages 693-709, October.
- Sandrine Rospabéa, 2002. "How Did Labour Market Racial Discrimination Evolve After The End Of Apartheid?," South African Journal of Economics, Economic Society of South Africa, vol. 70(1), pages 185-217, 03.
- Kristin F. Butcher & Cecilia Elena Rouse, 2001.
"Wage Effects of Unions and Industrial Councils in South Africa,"
Cornell University, ILR School, vol. 54(2), pages 349-374, January.
- Butcher, Kristin F. & Rouse, Cecilia Elena, 2001. "Wage effects of unions and industrial councils in South Africa," Policy Research Working Paper Series 2520, The World Bank.
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