Performs a placebo (permutation) test by re-estimating the synthetic control for each donor unit as a pseudo-treated unit. The p-value is the rank of the treated unit's RMSPE ratio among all units.
Performs a placebo (permutation) test by re-estimating the synthetic control for each donor unit as a pseudo-treated unit. The p-value is the rank of the treated unit's RMSPE ratio among all units.