Hi Folks,

I was calling xtoverid, noi; and was thinking of what this means following a bootstrap analysis. I was a bit surprised that xtoverid, noi results were different after xtivreg2 with and without bootstrapping. I thought it would use the same ivreg command in both cases. I guess I am not clear of what is happening in xtoverid. Anybody able to explain it to me? Here is the code I was using.

Code:
clear all
use http://fmwww.bc.edu/ec-p/data/macro/abdata.dta
tsset id year
xtivreg2 ys k (n=l2.n l3.n), fe small


gen lag3n=l3.n
gen lag2n=l2.n
gen newid=id
tsset newid year
bootstrap, reps(20) cluster(id) idcluster(newid) : xtivreg2 ys k (n=lag2n lag3n), fe small
xtoverid, noi 

xtivreg2 ys k (n=lag2n lag3n), fe small
xtoverid, noi