Hi Statalist,
I have a quick question regarding exclusion restrictions when using Heckman Twostep. I'm investigating the impact of various player statistics on auction values of football players sold at auction.
I regress:
Code:
ln(auctionprice) age nationality experience (various player statistics)
Due to potential bias from the unsold portion of my sample, I ran a probit regression of whether players were sold/unsold on the variables above along with factors that effect selection in order to establish my exclusion restrictions.
Would I be right in regressing
Code:
ln(auctionprice) age nationality experience (various player statistics) (exclusion restrictions) to see if my exclusion restrictions have no effect on auction price?
Kind Regards,
Marco
(Stata 16.0 SE)
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