Official statistics show that US real consumer wages have developed weakly over a longer part of the post WW-II period than is commonly believed. For example, in 2016, the median male wage earner has a lower wage in real terms than forty years ago, U.S. Census Bureau data shows.
Econometric modelling can give some clues to how the evalution of real wages in the US has lost track with the productivity trend.
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There is an version in Norwegian as well, it is here.