Question: Take themodel e S=1{X'y+u>0} Y = { X'+e if S=1 missing if S=0 02 021 (u) ~ N(0, (021 Show E[Y | X,S=1]=X'B+021(X'y). 1 })

Take themodele S=1{X'y+u>0} Y = { X'+e if S=1 missing if S=0 02

e S=1{X'y+u>0} Y = { X'+e if S=1 missing if S=0 02 021 (u) ~ N(0, (021 Show E[Y | X,S=1]=X'B+021(X'y). 1 })

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