Safe Assets, Risky Assets, and Dynamic Inefficiency in Overlapping-Generations Economies

57 Pages Posted: 30 Apr 2021 Last revised: 12 May 2021

See all articles by Martin F. Hellwig

Martin F. Hellwig

Max Planck Institute for Research on Collective Goods; University of Bonn - Department of Economics; European Corporate Governance Institute (ECGI)

Date Written: May 12, 2021

Abstract

The paper gives conditions for dynamic inefficiency of laissez-faire allocations in an overlapping-generations model with safe and risky assets. If the rate of population growth is certain, the conditions given depend only on how the rate of return on safe assets compares to the growth rate. If no safe assets are held, the implicit relative price for non-contingent intertemporal exchanges takes the place of the safe rate of return. Returns on risky assets do not enter the comparison. The conclusion holds regardless of whether welfare assessments are made from an interim perspective, taking account of the information that people have, or from an ex ante perspective. If a laissez-faire allocation is dynamically inefficient, a Pareto improvement can be implemented by a suitable fiscal policy intervention, which includes specific taxes or subsidies that neutralize incentive effects on risky investments and the price effects they induce.

Keywords: Dynamic Inefficiency, overlapping-generations models, safe asset shortages, macro risk allocation, public debt

JEL Classification: D15, D61, E21, E22, E62, H30

Suggested Citation

Hellwig, Martin F., Safe Assets, Risky Assets, and Dynamic Inefficiency in Overlapping-Generations Economies (May 12, 2021). MPI Collective Goods Discussion Paper, No. 2021/10, Available at SSRN: https://ssrn.com/abstract=3835685

Martin F. Hellwig (Contact Author)

Max Planck Institute for Research on Collective Goods ( email )

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Germany

University of Bonn - Department of Economics

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D-53113 Bonn
Germany

European Corporate Governance Institute (ECGI) ( email )

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1000 Brussels
Belgium

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