structural:summarization
Sunk cost effect

Another example is different payment schedules for gym members may result in different levels of potential sunk costs and affect the frequency of gym visits by consumers. That is to say, the payment schedule with other less frequent (e.g., quarterly, semi-annual or annual payment schedule), compared to a month pay the fee to the gym in a larger, these factors to reduce the cost and reduce the psychological sunk costs, more vivid sunk costs significantly increased people's gym visits. In summary, the behaviour of consumers in these two examples can be characterised by their ideal that losses loom larger than gains.