Cost Benefit Analysis

Topics: Costs, Cost, Welfare economics Pages: 4 (1463 words) Published: August 25, 2011
Explain the principles behind cost benefit analysis. Is the use of cost benefit analysis essential in the appraisal of public spending? Discuss this in the light of a transport capital expenditure project with which you are familiar. Cost–benefit analysis is often used by governments to evaluate the desirability of a given intervention. It is an analysis of the cost effectiveness of different alternatives in order to see whether the benefits outweigh the costs. The aim is to gauge the efficiency of the intervention relative to the present circumstances. The costs and benefits of the impacts of an intervention are evaluated in terms of the public's willingness to pay for them (benefits) or willingness to pay to avoid them (costs). Inputs are typically measured in terms of opportunity costs - the value in their best alternative use. The guiding principle is to list all parties affected by an intervention and place a monetary value of the effect it has on their welfare as it would be valued by them. The process involves monetary value of initial and ongoing expenses vs. expected return. Constructing plausible measures of the costs and benefits of specific actions is often very difficult. In practice, analysts try to estimate costs and benefits either by using survey methods or by drawing inferences from market behavior. For example, a product manager may compare manufacturing and marketing expenses with projected sales for a proposed product and decide to produce it only if he expects the revenues to eventually recoup the costs. Cost–benefit analysis attempts to put all relevant costs and benefits on a common footing. A discount rate is chosen, which is then used to compute all relevant future costs and benefits in present-value terms. Most commonly, the discount rate used for present-value calculations is an interest rate taken from financial markets. This can be very controversial; for example, a high discount rate implies a very low value on the welfare of future...
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