Stata Panel Data !!link!! Online

Fixed effects removes all time-invariant unobserved heterogeneity by de-meaning the data. It answers: Within a worker, how does changing union status affect wage?

Or use xtreg, fe vce(cluster country) for cluster-robust inference. stata panel data

New Stata commands like hdidregress (for synthetic DiD) and xthdidregress (for panel data with staggered adoption) are game-changers. But they require Stata 18. Most users are still on 17, so they default to old diff . stata panel data

(Install: ssc install xtcd )