[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: Inverse Mills ratio

From   Seema Bhatia <>
Subject   st: Inverse Mills ratio
Date   Tue, 14 Aug 2007 15:46:15 +0100

Hello there

This is probably a very stupid question but in the STATA help manual,

nshazard(newvar) and mills(newvar) are synonyms; either will create a new 
variable containing the nonselection hazard -- what Heckman (1979) referred 
to as the inverse of the Mills' ratio -- from the selection equation.  The 
nonselection hazard is computed from the estimated parameters of the 
selection equation.

So why would I have to calculate the Inverse Mills ratio instead of just 
using the Mills Lamda value reported with the regression results?

Many Thanks


*   For searches and help try:

© Copyright 1996–2015 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index