[발췌] Three kinds of economists (joke)

출처: http://www.barrypopik.com/index.php/new_york_city/entry/three_kinds_of_economists_joke

※ 발췌 (excerpt):

The old economics joke goes: “There are three kinds of economists: Those who can add/count and those who can’t.” (Also, “Those who know how to add/count and those who don’t.) The “three kinds of economists” joke has been cited in print since at least April 1992.

The joke has been cited in print since at least December 1990, when it described “three kinds of people.” In 1991, the joke involved “three kinds of actuaries;” in 1992, the joke involved “three kinds of mathematicians;” and in 1993, the joke involved “three kinds of computer scientists.”

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