The Condition for SRD ·The Local Randomization Assumption(局部随机化假设)： Randomized assignment around cutoff point: (Y:,Yo)LD:|X:∈6(xo) 6(x0)=(x-8,xo十8) 8>0 16
• The Local Randomization Assumption (局部随机化假设): • Randomized assignment around cutoff point: 16 The Condition for SRD
The Condition for SRD 。The Causal effect: If the assumptions all hold: X=小=分务 ti=Yii-Yoi (x）=E[Y:|X;=x],Y;=Y+xD; a+=lima(x),μ=limu(x） x+0 0 17
• The Causal effect: • If the assumptions all hold: 17 The Condition for SRD