whenever it is endangered. Theoretical models Temporal model of escalation Groups engage in temporal comparisons, which means that you compare actions and behaviors at "different points in time." This is a form of social identity scenario. This type of comparison can be made when a decision seems unproductive and forces team members to consider any threat to the group. Aggregate model "The aggregate model's emphasis is upon the accumulation and balance of forces rather than the ordering of effects over time." The model is general and can provide an ideal view as to how the effects whether positive or negative are defined by micro and macro forces. This model goes by situation rather than what researchers have defined as the norm. There is no process to follow, which makes it very useful for researchers because they can understand a situation more clearly as well as see the bigger picture of the situation. Determinants The main drivers of the tendency to continue investing in losing propositions are project, psychological, social, and structural. Project Project determinants are those that refer to the original commitments and decisions made at a project's beginning. This includes general project characteristics and initial financial costs. Among them, decision risk, opportunity cost information, and information acquisition have been found to have negative relationships with escalation of commitment. Decision uncertainty, positive performance trend information, and expressed preference for initial decision have been found to have positive relationships. High costs of ending a project or changing its course, potential financial gain upon completion, and extensive structure can factor in to escalation of commitment, making it difficult to walk away from the project. Preventing future monetary loss, potential savings, and having clearly available alternatives can allow for avoidance of the behavior. In studies by Teger and later Ross and Staw, situations where ending an action costs more than completing it resulted in decision makers being trapped in their current, costly behaviors. Psychological Psychological determinants are those that refer to internal views on the actions and information involved in a project. This can include cognitive factors, personality, and emotions as they relate to project elements. Of these, sunk costs, time investment, decision maker experience and expertise, self-efficacy and confidence, personal responsibility for the initial decision, ego threat, and proximity to project completion have been found to have positive relationships with escalation of commitment, while anticipated regret and positive information framing have been