illustrate that the bias of the ordinary heckit estimator is removed by these generalized estimation procedures. Along with OLS … effectiveness of financial incentives for weight loss among the obese. Estimation results indicate that the choice of the estimation …

perform matching estimations to analyse the treatment effect on the treated. In the cross-section estimation, we find …-participants. Therefore, we combine matching with difference-in-difference estimation (to control for unobserved heterogeneity), Doing so, we … matching estimation can be decomposed into a causal effect (6%-points), correlated unobserved heterogeneity and negative spill …