Public bad

Public bad

A public bad, in green economics, is a good that produces socially undesirable results.

Examples:
* Pollution is the most obvious example. There are less obvious examples.
* A public golf course could be seen as a public good insofar as it provides recreation to those who might not otherwise get it. On the other hand, if it takes away ecologically precious habitats or if it charges admission (which only a few can afford) to space that previously offered free access to everyone then it can be seen as a public bad.
* Deforestation, excess water use and pesticide use might well be seen as public bads, externalizing harms on future and current generations.

Most green economists advise measuring such impacts back to the present from the seventh generation. Thus in the golf course example, both the recreation and the negative impacts from deforestation, associated habitat and biodiversity loss, and pesticide toxicity would be estimated across those generations and some amortization applied to determine whether the golf course was a public benefit or a public bad from the point of view of that seventh generation.

Green economists argue that the costs of public bads are hidden as externalities from the businesses that cause them — meaning the market is not working correctly. The legal challenge is to create a system that takes into account these costs. The United States Environmental Protection Agency is an example of an attempt to make sure the costs of public bads are taken into account, although some groups on the right and left have criticized the value of its efforts.

ee also

*Waste
*social cost
*externality


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