st: initial values in ivprobit

[xueliansharon <xuelianstata@gmail.com>]

Dear all,

I want to estimate an ivprobit model, and I need to specify the initial
values using a matrix coeff, I always got an error message as : "initial
vector: extra parameter r1 found", How can I deal with this problem? 

The following are my codes (using nlsw88 as an example):

est clear 
sysuse nlsw88, clear
matrix define coeff=(1\2)
ivprobit collgrad tenure (wage=smsa grade), from(coeff)

I know that in the "from" option, I could specify numbers for initial values
directly rather than a matrix, but in my own program, I need to use a matrix
as initial values.

Many thanks.

Best,
Sharon
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