Social exchange theory is a sociological and psychological theory that studies the social behavior in the interaction of two parties that implement a cost-benefit analysis to determine risks and benefits. The theory also involves economic relationships—the cost-benefit analysis occurs when each party has goods that the other parties value.[1] Social exchange theory suggests that these calculations occur in romantic relationships, friendships, professional relationships, and ephemeral relationships as simple as exchanging words with a customer at the cash register.[2] Social exchange theory says that if the costs of the relationship are higher than the rewards, such as if a lot of effort or money were put into a relationship and not reciprocated, then the relationship may be terminated or abandoned.[3]