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We propose and analyze a generalization of present value maximization, order dependent present value (ODPV), for income choice. The model is analagous to the rank dependent expected utility model (RDEU) for choice under risk. The main feature of interest in the model is the transformation function, which operates on proportions of a fixed total of payments just as the probability weighting function in RDEU operates on probabilities. The ODPV model can accomodate many choice patterns for choice, so we conduct experiments in an attempt to (i) measure the structure of preferences over income streams and (ii) test for stability of the payment transformation function over different choice sets. The design is based on manipulations of the intertemporal choice triangle. A disaggregated nonparametric analysis in which we classify subjects according to which transformation function is most consistent with their revealed choice behavior shows that a linear and a strictly concave transformation function are the most common. Direct estimation of the transformation function shows clear support for a strictly concave transformation function. We also test between the ODPV model and the Discounted Utility (DU) model, and clearly reject DU in favor of ODPV.
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