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In the second model [42], we used the logit regression to estimate the probability of the participant choosing the first gamble, as a function of the difference in EV (dEV) and standard deviation (a measure of risk) between the first and second lottery: The variables dEV and risk are defined as follows:where x1, y1 and x2, y2 are the two possible outcomes of the first and the second lotteries respectively, with x1>y1, and x2>y2.
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