The authors estimate the cost savings to the U.S. payment system resulting from implementing Check 21. This legislation initially permitted a paper substitute digital image of a check, and later an electronic digital image of a check, to be processed and presented for payment on a same-day...

The authors construct and simulate a model of check exchange to examine the incentives a bank (or a bank clearinghouse) has to engage in practices that limit access to its payment facilities, in particular delaying the availability of check payment. The potentially disadvantaged bank has the...