Carvalho, Carlos Viana de; Masini, Ricardo; Medeiros, … - 2016
aggregate data when a "treated" unit suffers an intervention, such as a policy change, and there is no obvious control group … intervention estimator diverges resulting in the rejection of the hypothesis of no intervention effect regardless of its existence …. Whereas, for the case when at least one cointegration relation exists, we have a T-consistent estimator for the intervention …