Regression analysis Regression kink design Application programs Bandwidth Bias correction Causal inference Causal inferences Conditional quantiles Employment Fuzzy inference Heterogeneous treatment effects History projects Identification Identification (control systems) Insurance Intelligent systems Local Wald estimator Monte Carlo methods Multiplier bootstrap Practical importance Quantile Quantile process Quantile regression Quantile treatment effects Regression discontinuity design Robustness Robustness (control systems) Statistical inference Treatment effects Unemployment duration