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배출권 가격 불확실성을 고려한 기업의 환경투자 실물옵션 연구

Real Options on Firms' Environmental Investment in the Presence of Uncertainty on Tradable Emission Permit Price

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참고문헌

키워드

주제분류경제학

초록

본 논문의 목적은 배출권거래제 하에서 배출권 가격의 불확실성이 존재할 때 기업의 환경투자 의사결정 모형을 연구하는데 있다. 환경투자의 비가역성과 배출권 가격의 불확실성을 반영하기 위해 실물옵션 모형을 이용하였으며, 배출권이 예치가능한 경우와 가능하지 않은 경우를 구분하여 분석하였다. 미국 산성비프로그램의 데이터를 활용해서 시뮬레이션 한 결과, 불확실성을 고려하지 않을 경우 투자의 옵션가치를 평가하지 않음으로써 성급한 환경투자를 유발할 수 있음을 보았다. 아울러 배출권의 예치가 허용될 때 기업의 환경투자 인센티브가 제고되는 것으로 나타났는데, 이는 예치가능한 배출권거래제에서는 환경투자를 통해 확보한 잉여배출권을 기업이 신축적으로 사용할 수 있기 때문인 것으로 판단된다.

Abstract

This paper analyzes an investment decision model under tradable emission permit (TEP) system. A firm may expand its environmental capital to abate pollutants or use emission permits to comply with the emission constraint imposed by TEP. Real option model is employed to consider the presence of investment irreversibility and price uncertainty. Option values for undertaking environmental investment is derived under non-bankable as well as bankable TEP. A simulation for power plant's option value is provided using ‘U.S. Acid Rain Program’ data.

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