The search for the least costly way of providing a desired public good is:

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Cost-effectiveness analysis is a method of comparing the costs and benefits of different approaches to achieving the same goal, such as providing a public good. It aims to identify the option that achieves the desired outcome at the least cost. Contingent valuation involves asking individuals how much they are willing to pay for a public good, while revealed preference looks at how people behave in relation to the availability of the public good. Social discounting considers the future costs and benefits of a policy or project, and how they should be valued relative to present costs and benefits. While these methods can be useful in certain contexts, cost-effectiveness analysis is the most directly relevant to identifying the least costly way of providing a public good.

The Search for the Least Costly Way of Providing a Desired