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Wages in salt mining
| Although the existence of wage labour dates back at least four millennia, ‘free labour’ regulated by employment contract has reached its peak coverage of about 90 percent of the working population in Western countries only in the last century. Yet, recent historical research suggests that forms of wage labour have been more prominent in the early economic development of North Western Europe than used to be recognized. The types of employment relations, however, are manifold and the ways in which they were regulated diverged strongly per region and trough time.
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