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Average rates of return, working capital, and NPV-consistency in project appraisal: A sensitivity analysis approach
International Journal of Production Economics ( IF 9.8 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.ijpe.2020.107769
Carlo Alberto Magni , Andrea Marchioni

In project appraisal under uncertainty, the economic reliability of a measure of financial efficiency depends on its strong NPV-consistency, meaning that the performance metric (i) supplies the same recommendation in accept-reject decisions as the NPV, (ii) ranks competing projects in the same way as the NPV, (iii) has the same sensitivity to perturbations in the input data as the NPV. In real-life projects, financial efficiency is greatly affected by the management of the working capital. Using a sensitivity analysis approach and taking into explicit account the role of working capital, we show that the average return on investment (ROI) is not strongly NPV-consistent in accept-reject decisions if the working capital is uncertain and changes under changes in revenues and costs. Also, it is not strongly NPV-consistent in project ranking. We also show that the internal rate of return (IRR) is not strongly NPV-consistent and economic analysis may even turn out to be impossible, owing to possible nonexistence and multiplicity caused by perturbations in the input data, as well as to possible shifts in the financial meaning of IRR under changes in the project’s value drivers. We introduce the straight-line rate of return (SLRR), based on the notion of average rate of change, which overcomes all the problems encountered by average ROI and IRR: It always exists, is unique, strongly NPV-consistent for both accept-reject decisions and project ranking, and has an unambiguous financial nature.

中文翻译:

项目评估中的平均回报率、营运资金和 NPV 一致性:敏感性分析方法

在不确定性下的项目评估中,财务效率度量的经济可靠性取决于其强大的 NPV 一致性,这意味着绩效指标 (i) 在接受 - 拒绝决策中提供与 NPV 相同的建议,(ii) 对竞争项目进行排名以与 NPV 相同的方式,(iii) 对输入数据中的扰动具有与 NPV 相同的敏感性。在实际项目中,营运资金的管理极大地影响了财务效率。使用敏感性分析方法并明确考虑营运资金的作用,我们表明,如果营运资金不确定且收入变化导致变化,则平均投资回报率 (ROI) 在接受-拒绝决策中与 NPV 不一致和费用。此外,它在项目排名中与 NPV 不一致。我们还表明,内部收益率 (IRR) 与 NPV 不一致,经济分析甚至可能变得不可能,因为输入数据中的扰动可能不存在和多重性,以及可能的变化项目价值驱动因素变化下 IRR 的财务意义。我们引入了基于平均变化率概念的直线收益率 (SLRR),它克服了平均 ROI 和 IRR 遇到的所有问题:它始终存在,是唯一的,对于两者都具有很强的 NPV 一致性拒绝决策和项目排名,并具有明确的财务性质。由于输入数据中的扰动可能导致不存在和多重性,以及在项目价值驱动因素的变化下 IRR 的财务含义可能发生变化。我们引入了基于平均变化率概念的直线收益率 (SLRR),它克服了平均 ROI 和 IRR 遇到的所有问题:它始终存在,是唯一的,对于两者都具有很强的 NPV 一致性拒绝决策和项目排名,并具有明确的财务性质。由于输入数据中的扰动可能导致不存在和多重性,以及在项目价值驱动因素的变化下 IRR 的财务含义可能发生变化。我们引入了基于平均变化率概念的直线收益率 (SLRR),它克服了平均 ROI 和 IRR 遇到的所有问题:它始终存在,是唯一的,对于两者都具有很强的 NPV 一致性拒绝决策和项目排名,并具有明确的财务性质。
更新日期:2020-11-01
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