Interrupted Times Series (ITS)

ITS, or Interrupted Times Series expands the time series model to evaluate the impact of interruptions or events, like ad campaigns or the introduction of a competitor, on the time series.  ITS models identify and describe how events impact the time series; whether the impacts are immediate or gradual, persistent or decaying, and their magnitudes.  ITS is especially useful for analyzing quasi-experimental research on naturally occurring interventions.