Effect of hormonal reactivity to stress on time preference model parameters in the Stress groups.

Each column represents an OLS regression; the dependent variable is the column title, and the independent variables are shown as rows. They include i. an indicator variable for the delay condition (“Delay”), ii. Cortisol area under the curve for each individual subject in the Stress groups (minutes × nmol/L, divided by 1,000,000 for ease of readability), and iii. Alpha-amylase area under the curve for each individual subject in the Stress groups. The cells show the OLS regression coefficients, betas, which are to be interpreted such that a one-unit change in the independent variable is associated with a beta change in the dependent variable. P-values based on heteroskedasticity-robust standard errors are shown in parentheses. Asterisks denote statistical significance of the individual coefficients: *p**p