[dredmorbius]

True, though there are studies from elsewhere, which provide also a sampling of methodologies for determining a minimum living wage, dating to the early 19th century.

A living wage means just that: what is required to support a worker, their family, including children, and educate them, to provide the next generation of workers. Adam Smith discusses this at length in Wealth of Nations (Book 1, Chapter 8: https://en.m.wikisource.org/wiki/The_Wealth_of_Nations/Book_...)

You'll find other examples in Richard Meier, Science and Economic Development, 1966, dating to California during the Great Depression.