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Improvement of Social Discount Rate of Public Investment Projects Considering Risk

Lee Eui-kyung 1

1대진대학교

Accredited

ABSTRACT

Social Discount Rate(SDR) is a key factor in the economic evaluation of public investment projects. The preceding studies have estimated the appropriate SDR from a time-series perspective. This study, on the other hand, sought ways to improve SDR from a cross-sectional perspective in consideration of risk. This study proposed a method to obtain a SDR by reflecting the risk of public investment project using CAPM, and revealed that beta of the industry to which the public investment belongs can be usefully used as beta of CAPM. This study proposed to divide public investment projects into three industrial sectors(SOC, environment & water resources, science & technology). To help understand this improvement, a specific case of calculating the SDR using industry beta is presented. In addition, this study explained the difference between the risks of benefits and costs within the same project needs different discount rates. As it is important to calculate the appropriate SDR considering the risk of public investment projects, this improvement can increase the logical robustness of economic evaluation of public investment projects.

Citation status

* References for papers published after 2023 are currently being built.