“How did all this get started? Some of the first licensees…” — Freakonomics Radio at 9:56
“How did all this get started? Some of the first licensees were physicians. Licensing started out with medicine in the late 19th century, and it was limited to the learned professions so-called until about the 70s. Since then, it's just been a straight line up the number of licensed professions and the people covered…”
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