2sls by hand vs. 2sls EViews

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joff
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Joined: Thu Jan 04, 2018 4:20 am

2sls by hand vs. 2sls EViews

Postby joff » Fri Aug 10, 2018 8:25 am

Attached is my replication of the example from Wooldridge textbook. I am puzzled because I get different coefficient estimates (EViews vs. by hand). If anybody has an explanation for this I would be grateful. I am sure it is something trivial but I just dont see it.
Attachments
2sls_green.prg
(289 Bytes) Downloaded 32 times
2sls_green.wf1
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EViews Gareth
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Re: 2sls by hand vs. 2sls EViews

Postby EViews Gareth » Fri Aug 10, 2018 8:37 am

Make sure you're using the same sample in each estimation. LWAGE has NA values so observations are dropped from the TSLS equation, but is not included in the 1stage regression, so observations are not being dropped.
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joff
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Joined: Thu Jan 04, 2018 4:20 am

Re: 2sls by hand vs. 2sls EViews

Postby joff » Sun Aug 12, 2018 6:07 am

I was right that it is trivial:) Thank you.


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