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Steven Polzin 《运输评论》2013,33(6):820-822
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Timing rules for major transportation investments 总被引:3,自引:0,他引:3
The timing decision for major transportation investments – when to build – typically is made without an objective approach
for considering the economic value of implementation at different times. This paper uses a model of benefit-cost analysis
and derives rules for timing major transportation investments. Three sets of conditions are considered, depending on whether
annual benefits of an investment are uncertain and whether the objective is to maximize net present value or simply to achieve
positive net present value. The timing rules under each set of conditions are stated in three forms: benefit-cost ratio, annual
benefits, and implementation time. The paper compares these timing rules analytically, discusses potential applications, and
illustrates them with a numerical example. Consequences of incorrectly using the timing rules are also examined with the example.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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