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sampleSelection: Limited Dependent Vari.
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[#6017] 2-step estimator in tobit5 is wrong
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Date:
2015-01-20 04:58
Priority:
3
State:
Open
Submitted by:
Ott Toomet (
otoomet
)
Assigned to:
Nobody (None)
Hardware:
None
Product:
None
Operating System:
None
Component:
None
Version:
None
Severity:
minor
Resolution:
None
URL:
Summary:
2-step estimator in tobit5 is wrong
Detailed description
Found piece of code in heckit5fit.R:
sigma1 <- sqrt( se1^2 + ( betaL1*delta1)^2)
sigma2 <- sqrt( se2^2 + ( betaL2*delta2)^2)
It should be
sigma1 <- sqrt( se1^2 + betaL1^2*delta1)
sigma2 <- sqrt( se2^2 + betaL2^2*delta2)
heckit2fit should also be checked.
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