id	keyword
bae-8464	treatment
bae-8464	effect
bae-8464	time
bae-8464	group
bae-8464	treatment effect
bae-8464	policy
bae-8464	heterogeneity
bae-8464	time treatment
bae-8464	pdo
bae-8464	estimator
bae-8464	agricultural
bae-8464	effect heterogeneity
bae-8464	analysis
bae-8464	covariates
bae-8464	farm
bae-8464	impact
bae-8464	certification
bae-8464	european