Abstract
This paper considers the difference‐in‐differences (DID) method when the data come from repeated cross‐sections and the treatment status is observed either before or after the implementation of a program.
Fingerprint
Dive into the research topics of 'Difference‐in‐differences when the treatment status is observed in only one period'. Together they form a unique fingerprint.
What is the RST moment condition?
where the rst moment condition is the score function of a likelihood function corresponding to the rststage, while the remaining two moment conditions correspond to the second stage, derived as the linearprojections ofYt onto the space generated by the estimated propensity scores.
What is the Progresa program?
The PROGRESA program, later renamed Oportunidades, was an anti-poverty program introduced in Mexicoin May 1998. The program was aimed at improving the educational and health status of poor families. Theprogram consisted of cash transfers for each grade-eligible child who attended at least 85% of the schooldays. The cash transfers targeted children in the last four grades of primary school and the rst three gradesof secondary school. The amount of the grant increased with the grade, being larger for girls in secondaryschool.
