. T.. & Wilson, T. D. (2008). A wrinkle in time: Asymmetric valuation of past and future events. Psychological Science. 19 (8). 796-801. Chen, T.. Kalra, A., & Sun• B. (2009). Why do consumers buy extended service contracts? Journal of Consumer Research. 36(4), 611-623. Diener, E., & Biswas-Diener, R. (