comparing coefficients over different time units

[Willem van Bon]

hi,

we are trying to compare coefficients over 2 regression models but are not sure how we should do that.
this are our codes:
xtreg radical_right import_shock country_year if year < 2002, fe cluster(id)
xtreg radical_right import_shock country_year if year >= 2002, fe cluster(id)

is there someone who could help us with our problem?
we would like to compare the coefficients of import_shock.

regards,
Willem Berend van Bon

[Rich Goldstein]

if I understand you correct, see

h suest

be sure to read the help file carefully esp re: the use of "cluster" option

[Carlo Lazzaro]

Willem:
as an aside to Rich's helpful advice, I would create a two-level categorical variable -i.year_2022- and plug it as a predictor in the right-hand side of my -xtreg,fe- equation.
Then I would use:

mat list e(b)

to retrieve the coefficients and -test- and -lincom- to compare them.