The Time Path of the Saving Rate: Hyperbolic Discounting and Short-Term Planning

Arbeitspapier

The standard neoclassical growth model with Cobb-Douglas production predicts a monotonically declining saving rate, when reasonably calibrated. Ample empirical evidence, however, shows that the transition paths of most countries’ saving rates exhibit a statistically significant hump-shaped pattern. Prior literature shows that CES production may imply a hump-shaped pattern of the saving rate (Goméz, 2008). However, the implied magnitude of the hump falls short of what is seen in empirical data. We introduce two non-standard features of preferences into a neoclassical growth model with CES production: hyperbolic discounting and short planning horizons. We show that, in contrast to the commonly accepted argument, in general (except for the special case of logarithmic utility) a model with hyperbolic discounting is not observationally equivalent to one with exponential discounting. We also show that our framework implies a hump-shaped saving rate dynamics that is consistent with empirical evidence. Hyperbolic discounting turns out to be a major factor explaining the magnitude of the hump of the saving rate path. Numerical simulations employing a generalized class of hyperbolic discount functions, which we term regular discount functions, support the results.

Object Details

• Language: Englisch

References and Relationships

• Bibliographic citation: Series: Nota di Lavoro ; No. 63.2014

Classification and Topics

• Classification: Wirtschaft ; Micro-Based Behavioral Economics: Role and Effects of Psychological, Emotional, Social, and Cognitive Factors on Decision Making‡ ; Macroeconomics: Consumption; Saving; Wealth ; Economic Growth and Aggregate Productivity: General
• Subject: Saving Rate Dynamics ; Non-Monotonic Transition Path ; Hyperbolic Discounting ; Regular Discounting ; Short-Term Planning ; Neoclassical Growth Model

Contributors, Places and Time

• Event: Geistige Schöpfung
• (who): Farzin, Y. Hossein ; Wendner, Ronald
• Event: Veröffentlichung
• (who): Fondazione Eni Enrico Mattei (FEEM)
• (where): Milano
• (when): 2014

Further information

• Handle: http://hdl.handle.net/10419/101998
• Last update: 10.03.2025, 11:42 AM CET