• Is Monotonicity in an IV and RD design testable? No, but you can still check it 

      Edwards, Ben; Fiorini, Mario; Stevens, Katrien; Taylor, Matthew
      Published 2013-04-01
      Whenever treatment effects are heterogeneous and there is sorting into treatment based on the gain, monotonicity is a condition that both Instrumental Variable and fuzzy Regression Discontinuity designs have to satisfy for ...
      Open Access
      Working Paper