Harrison, G., Lau, M., Rutström, E., & Sullivan, M. (2005). Eliciting Risk and Time Preferences Using Field Experiments: Some Methodological Issues. In J. Carpenter, G. Harrison, & J. List (Eds.), Field experiments in economics (125-218). (Research in Experimental Economics.). Emerald. https://doi.org/10.1016/s0193-2306%2804%2910005-7