Individual-specific mortality is associated with how individuals evaluate future discounting decisions

Area of Science:

• Behavioral Economics
• Evolutionary Psychology
• Life-History Theory

Background:

• Future reward discounting is crucial for life-history strategies.
• Life-history theory posits that mortality cues may trigger accelerated life-history strategies.
• Evidence linking mortality cues to discounting in modern humans is limited.

Purpose of the Study:

• To investigate if country-level life expectancy predicts individual future discounting behavior.
• To explore the relationship between perceived mortality and intertemporal decision-making.

Main Methods:

• Cross-national study involving 13,429 participants from 54 countries.
• Assessment of intertemporal choice behavior using multiple decision-making tasks.
• Analysis correlating life expectancy data with individual discounting patterns.

Main Results:

• Lower life expectancy was associated with a stronger preference for immediate rewards.
• Higher life expectancy predicted greater willingness to delay gratification, particularly for larger relative gains or shorter delays.
• Age moderated willingness to wait, with middle-aged individuals showing increased future orientation.

Conclusions:

• Mortality cues, reflected in life expectancy, significantly influence intertemporal decision-making.
• Findings support the hypothesis that environmental factors shape life-history trade-offs via future discounting.
• Individual discounting behavior is adaptable and sensitive to perceived mortality risks.