st: help with margins syntax

["Sergio I Prada" <sprada1@umbc.edu>]

Sorry, here a correction on the code

x is binary and it is the variable of interest in a causal model

tobit y x a b, ll(0)
predict phi, pr(0,.)
summ phi if x==1
scalar define scale = _result(3)
gen effect = _b[x]*scale


-- 
Sergio

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