@TechReport{iza:izadps:dp3696,
            	author={Buscha, Franz and Maurel, Arnaud and Page, Lionel and Speckesser, Stefan},
            	title={The Effect of High School Employment on Educational Attainment: A Conditional Difference-in-Differences Approach},
            	year={2008},
	month={Sep},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={3696},
            	url={https://www.iza.org/publications/dp3696},
	abstract={Using American panel data from the National Educational Longitudinal Study of 1988 (NELS:88) this paper investigates the effect of working during grade 12 on attainment. We exploit the longitudinal nature of the NELS by employing, for the first time in the related literature, a semiparametric propensity score matching approach combined with difference-in- differences. This identification strategy allows us to address in a flexible way selection on both observables and unobservables associated with part-time work decisions. Once such factors are controlled for, insignificant effects on reading and math scores are found. We show that these results are robust to a matching approach combined with difference-in-difference-in-differences which allows differential time trends in attainment according to the working status in grade 12.},
	keywords={evaluation;propensity score matching;education},
            }