The study by Dawes (1988), on whether to return from a holiday or not, is an example of:

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The study by Dawes (1988) on whether to return from a holiday or not is an example of the sunk-cost effect. The sunk-cost effect refers to the tendency to persist with a course of action even when it no longer has any payoff, simply because effort or resources have already been invested in it. In the case of this study, individuals who had already invested time and money in their holiday were less likely to cut it short and return home, even if the remainder of the holiday was unlikely to be enjoyable or fulfilling.

The Study by Dawes (1988), on Whether to Return from a Holiday