[Øyvind Snilsberg]

(maybe this isent Stata related, but for interpretation, do i have to remove the omitted variables from the model and run it again or?)

Running the model again without the omitted variables will not change anything.

[Anton Kusk]

Running the model without the omitted variables changed the variable i want to interpret, a lot.

reghdfe ln_trade begge_euro eu_o eu_d, abs(exp_time imp_time pair_id)
------------------------------------------------------------------------------
ln_trade | Coefficient Std. err. t P>|t| [95% conf. interval]
-------------+----------------------------------------------------------------
begge_euro | .0075438 .0355434 0.21 0.832 -.0621206 .0772082
eu_o | 0 (omitted)
eu_d | 0 (omitted)
_cons | 15.74563 .0016433 9581.98 0.000 15.74241 15.74885
------------------------------------------------------------------------------

[Øyvind Snilsberg]

That's strange, perhaps the omitted variables were omitted for some other reason than being collinear with the fixed effects?
Hopefully someone with more experience will come along...