Understanding “Public Goods”

International Liberty

I wrote last month about “anarcho-capitalists” who think we don’t need any government because markets can provide everything.

Most people, though, think that there are certain things (such as national defense and the rule of law) that are “public goods” because they won’t exist if they’re not provided by government.

Academics tell us, if we want to be rigorous, that there are two characteristics that define public goods.

  1. They are goods that people won’t buy because they can reap the benefit without paying (economists say this means the good is “non-excludable” while normal people refer to this as the free-rider problem).
  2. They are goods that can be universally shared since one person’s consumption of the good doesn’t limit another person’s consumption of the good (economists say such goods are “non-rival”).

That’s a bit wonky, so let’s consider the example of national defense.

In a world with bad…

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