Guest post by Azizonomics.
Well, my intuition says one thing — the change in trajectory correlates very precisely with the end of the Bretton Woods system. My intuition says that that event was a seismic shift for wages, for gold, for oil, for trade. The data seems to support that — the end of the Bretton Woods system correlates beautifully to a rise in income inequality, a downward shift in total factor productivity, a huge upward swing in credit creation, the beginning of financialisation, the beginning of a new stage in globalisation, and a myriad of other things.
Some, including Peter Thiel and James Hamilton, have suggested that there is data to suggest that an oil shock may have been the catalyst that put us into a new trajectory.