A group of agents disagree about the appropriate inter temporal preferences to use when exploiting a common productive resource. They thus delegate decision making to a social planner who allocates consumption efficiently across heterogeneous individuals and over time. We define `policy...

A social time preference methodology derived from Feldstein (1965) is applied to calculate social discount rates across 167 countries and across time from 2005-2050 for a country case (Brazil). This attempt seeks to compute comparable figures from a homogeneous dataset and provides a...

This paper aims to estimate the social discount rate (SDR) rather than dig into its theoretical foundation. As SDRs can be derived by investigating both the rate of return on investment and the social time preference rate, we estimate the marginal productivity of both private and public capital...

In benefit-cost analysis, we accept that a future dollar is worth something less than a dollar today. However, we do not have a clear method to apply social discounting in retrospective benefit-cost analysis. In this note, we will first develop the case for using historical borrowing as the...

In a series of papers, Martin Weitzman has proposed a Dismal Theorem. The general idea is that, under limited conditions concerning the structure of uncertainty and preferences, society has an indefinitely large expected loss from high-consequence, low-probability events. Under such conditions,...

We explore steady-state inequality in an intergenerational model with altruistically linked individuals who experience privately observed taste shocks. When the welfare function depends only on the initial generation, efficiency requires immiseration: inequality grows without bound and...

This paper argues that “payback method” for evaluating alternative investment opportunities on the basis of their potential for future gain is superior to discounting in the perspective of allocation of resources in an Islamic zero-interest-rate economy