We obtain laboratory evidence that suggests that (i) promisors are more likely to keep promises the more they were relied upon by a promisee; (ii) this effect is anticipated by promisees, who accordingly strategically overinvest to lock promisors into keeping their promises (“psychological...

Promising serves as an important commitment mechanism by operating on a potential cheater’s internal value system. We present experimental evidence on what motivates people to keep their promises. First, they feel that they are duty-bound to keep their promises regardless of whether promisees...