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st: The error "initial values not feasible, r(1400)" in mvtobit model
From
Nimanthika Lokuge <[email protected]>
To
[email protected]
Subject
st: The error "initial values not feasible, r(1400)" in mvtobit model
Date
Wed, 3 Apr 2013 18:44:53 +0530
I'm estimating the demand for several food items using Almost Ideal
Demand System. There, I have to do censoring using the Multivariate
Tobit model.
I'm using Stata/SE 11.2 and my data set consists of nearly 18,500 households.
I used the following code & it returned an error as "initial values
not feasible, r(1400)".
//homogeneity//
constraint define 1 [q1]lnp1+[q1]lnp2+[q1]lnp3=0
constraint define 2 [q2]lnp1+[q2]lnp2+[q2]lnp3=0
//symmetry//
constraint define 3 [q1]lnp2=[q2]lnp1
global demand1 "(q1: w1 lnp1 lnp2 lnp3 lnxp)"
global demand2 "(q2: w2 lnp1 lnp2 lnp3 lnxp)"
mvtobit $demand1 $demand2, const(1 2 3)
Is there a way to tackle this error?
Many thanks in advance.
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