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    Author(s): Mo Zhou; Joseph Buongiorno
    Date: 2019
    Source: Canadian Journal of Forest Research
    Publication Series: Scientific Journal (JRNL)
    Station: Southern Research Station
    PDF: Download Publication  (749.0 KB)

    Description

    The common assumption of risk neutrality in forest decision making is generally inadequate because the stakeholderstend to be averse to fluctuations in the return criteria. In Markov decision processes (MDPs) of forest management, risk aversionand standard mean-variance analysis can be readily dealt with if the criteria are undiscounted expected values. However, withdiscounted criteria such as the fundamental net present value of financial returns, the classic mean-variance optimization isnumerically intractable. In lieu of this, this paper (i) presents a linear-programming method to calculate the variance ofdiscounted criteria conditional on any specific policy and (ii) adopts, as an alternative to the variance measure of risk, the “discount normalized variance” (DNV), an economically meaningful criterion consistent with income-smoothing behavior. The DNV is then used in procedures analogous to mean-variance analysis and certainty-equivalent optimization tractable by quadratic programming. The methods are applied to the management of uneven-aged, mixed-species forests in the southern United States. The results document the trade-off between the expected net present value and risk of financial returns, as well as the consequences for selected ecological criteria.

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    Citation

    Zhou, Mo; Buongiorno, Joseph. 2019. Optimal forest management under financial risk aversion with discounted Markov decision process models. Canadian Journal of Forest Research. 49(7): 802-809. https://doi.org/10.1139/cjfr-2018-0532.

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    Keywords

    uneven-aged management, risk aversion, economics, multiple criteria, Markov decision process, quadratic programming.

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https://www.fs.usda.gov/treesearch/pubs/58257