@TechReport{iza:izadps:dp810,
            	author={Abbring, Jaap H. and Berg, Gerard J. van den},
            	title={A Simple Procedure for the Evaluation of Treatment Effects on Duration Variables},
            	year={2003},
	month={Jun},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={810},
            	url={https://www.iza.org/index.php/publications/dp810},
	abstract={Often, a treatment and the outcome of interest are characterized by the moment they occur,
and these moments are realizations of stochastic processes with dependent unobserved
determinants. We develop a simple and intuitive method for inference on the treatment effect.
The method can be implemented as a graphical procedure or as a straightforward parameter
test in an auxiliary univariate single-spell duration model. The method exploits information on
the timing of the treatment relative to the outcome that is discarded in binary treatment
analyses.},
	keywords={duration analysis;hazard rate;selectivity bias;treatment effect;unobserved heterogeneity},
            }