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. Author manuscript; available in PMC: 2010 Apr 6.
Published in final edited form as: Judgm Decis Mak. 2009 Feb 1;4(1):1–19.

Table 3.

Mean discount rate, by selected self-reported behavioral variables

Kruskal Wallis test of difference between groups

N Arithmetic mean SDR Geometric mean SDR Median SDR χ2 df p
Planning Behavior

Plan ahead all the time 145 0.036 0.015 0.020 1.425 1 0.2326
Live from day to day 30 0.059 0.023 0.027

Savings behavior

Prefer saving money 148 0.037 0.016 0.019 3.901 1 0.0482
Prefer spending money 25 0.063 0.026 0.043

Planning horizon

Next few months 58 0.054 0.024 0.043 5.433 2 0.0661
Next year 71 0.033 0.018 0.019
Next few years or longer 46 0.034 0.010 0.013

Saving horizon

Next few months 35 0.068 0.034 0.043 11.239 2 0.0036
Next year 79 0.034 0.015 0.020
Next few years or longer 61 0.033 0.013 0.008