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Cross-dynastic intergenerational altruism
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DOI：10.1016/j.jeem.2024.103059.png)
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Abstract
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Does saving behavior reveal socially relevant intertemporal preferences? People concerned about the next generation as such might assign welfare weights on other dynasties. These concerns are captured in a model of saving by decomposing the present generation's preference for the next into its dynastic and cross-dynastic components. With such preferences, saving for one's descendants benefits present members of other dynasties if they also care cross-dynastically. These preference externalities imply that socially relevant intertemporal preferences cannot be inferred from saving behavior and that utility discount rates revealed by saving behavior should be lowered. The external effect of present saving also decreases over time, implying that intertemporal preferences inferred from saving behavior are time-inconsistent.
Keywords:
Intergenerational altruism
Social discounting
Time-inconsistency
Declining discount rates
Interdependent utility
Isolation paradox
Climate policy
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