Escalation of commitment is a human behavior pattern in which an individual or group facing increasingly negative outcomes from a decision, action, or investment nevertheless continue the behavior instead of altering course. The actor maintains behaviors that are irrational, but align with previous decisions and actions. Economists and behavioral scientists use a related term, sunk-cost fallacy, to describe the justification of increased investment of money or effort in a decision, based on the cumulative prior investment ("sunk cost") despite new evidence suggesting that the future cost of continuing the behavior outweighs the expected benefit. In sociology, irrational escalation of commitment or commitment bias describe similar behaviors. The phenomenon and the sentiment underlying them are reflected in such proverbial images as "Throwing good money after bad", or "In for a penny, in for a pound", or "It's never the wrong time to make the right decision", or "If you find yourself in a hole, stop digging." Early use Escalation of commitment was first described by Barry M. Staw in his 1976 paper, "Knee deep in the big muddy: A study of escalating commitment to a chosen course of action". Researchers, inspired by the work of Staw, conducted studies that tested factors, situations and causes of escalation of commitment. The research introduced other analyses of situations and how people approach problems and make decisions. Some of the earliest work stemmed from events in which this phenomenon had an effect and help explain the phenomenon. Research and analysis Over the past few decades, researchers have followed and analyzed many examples of the escalation of commitment to a situation. The heightened situations are explained in three elements. Firstly, a situation has a costly amount of resources such as time, money and people invested in the project. Next, past behavior leads up to an apex in time where the project has not met expectations or could be in a cautious state of decline. Lastly, these problems all force a decision-maker to make choices that include the options of continuing to pursue a project until completion by adding additional costs, or canceling the project altogether. Researchers have also developed an argument regarding how escalation of commitment is observed in two different categories. Many researchers believe that the need to escalate resources is linked to expectancy theory. "According to such a viewpoint, decision makers assess the probability that additional resource allocations will lead to goal attainment, as