In many previous papers, self-employment has shown a tendency to rise
with age. There are more older workers in self-employment than younger workers
because the older workers have greater experience, managerial skill and ability to
access credit than younger workers, and these attributes accumulate with age. This
study aims to impute the individual self-employed earnings and productivity and to
investigate the age-earnings and age-productivity profiles of self-employed workers in
Thailand.
This study uses the Socio-Economic Survey (SES) of Thailand, 2006-
2011, as the empirical data. The study focuses on four sectors: 1) Manufacturing, 2)
Wholesale and Retail, 3) Hotel and Restaurant, and 4) Transport and Storage. Since
the self-employed data is reported in the form of household data, the self-employed
individual earnings and productivity were imputed first. After that, the self-employed
earnings and productivity were estimated under the framework of the Mincer earnings
equation. And the Pool OLS estimator is used as the statistical approach.