The authors generalize traditional event-study techniques to allow for event-induced parameter shifts, shifting variances, and firm-specific event periods. Their method, which nests traditional methods, also permits systematic risk to change gradually during the event period and exit the period...

Each year, hundreds of millions of credit and debit cardholders make billions of transactions worth trillions of dollars. Yet few consumers are aware that such transactions travel through, and are made possible by a highly evolved group of intermediaries that sign up merchants to accept cards,...

The authors generalize traditional event-study techniques to allow for event-induced parameter shifts, shifting variances, and firm-specific event periods. Their method, which nests traditional methods, also permits systematic risk to change gradually during the event period and exit the period...