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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: J Dev Econ. 2015 Aug 19;117:151–170. doi: 10.1016/j.jdeveco.2015.07.008

Table 2.

Stability of Time Preferences

Paper Population Time Corr Sig Inc
Meier and Sprenger (2015) 250 US low-income 2 years 0.40 yes inc
Krupka and Stephens Jr (2013) 1194 Americans 1 year ? ? hyp
Harrison et al. (2006) 97 Danes 3 – 17 months ? yes inc
Kirby et al. (2002) 95–123 Bolivian Amerindians 3 –12 months 0.004–0.46 yes inc
Kirby (2009) 46–81 US students 1 – 12 months 0.57–0.75 yes inc
Li et al. (2013) 336–516 Americans 1 week – 14 months 0.33–0.68 yes hyp
Wölbert and Riedl (2013) 53 Dutch students 5–10 weeks 0.61–0.68 yes inc
Dean and Sautmann (2014) 961 peri-urban Malians 1 week 0.61–0.67 yes inc

Corr - the correlation of time preferences over time. Sig - whether time preferences are significantly related over time. Inc - whether the experiment was incentivized rather than hypothetical.