Table 1.

The fixed effects for the mixed effect models predicting whether the future reward was chosen over the immediate reward using overall country life expectancy (left) and individual-specific life expectancy (right). (*p < 0.05; **p < 0.01; ***p < 0.001.)

	overall country life expectancy			individual-specific life expectancy
	estimate (std error)	z value	p value	estimate (std error)	z value	p value
intercept	−0.67 (0.66)	−1.00	0.316	−0.71 (0.29)	−2.50	0.013*
k-parameter	3.11 (0.62)	5.03	<0.001***	5.40 (0.23)	23.16	<0.001***
life expectancy	0.74 (0.15)	4.86	<0.001***	0.28 (0.11)	2.60	0.009**
GDP	0.15 (0.12)	1.28	0.202	0.20 (0.12)	1.69	0.092
participant sex	0.04 (0.12)	0.33	0.738	0.42 (0.17)	2.50	0.013*
participant age	0.22 (0.04)	5.36	<0.001***	0.20 (0.04)	5.02	<0.001***
participant age2	−0.02 (0.02)	−0.91	0.360	−0.01 (0.02)	−0.36	0.716
k-parameter * life expectancy	0.94 (0.36)	2.58	0.010**	0.59 (0.24)	2.46	0.014*
k-parameter * GDP	0.09 (0.07)	1.23	0.218	0.12 (0.04)	3.18	0.001**
k-parameter * participant sex	0.22 (0.42)	0.53	0.597	1.14 (0.49)	2.34	0.019*
k-parameter * participant age	0.22 (0.06)	3.78	<0.001***	0.22 (0.05)	4.63	<0.001***
k-parameter * participant age2	−0.19 (0.02)	−8.83	<0.001***	−0.10 (0.04)	−2.60	0.009**