The examples in this R file are based on a subsample from the Bangladesh Household Survey 1991/92-1998/99 (Khandker et al., 2010) Attribution 3.0 IGO — CC BY 3.0 IGO http://www.pep-net.org/sites/pep-net.org/files/typo3doc/pdf/Training_Material/PEP_Guide_Stata.pdf