[mac01021]

This is interesting. Clearly _something_ happened in the early 70s (noise in the signal makes it hard to be sure of the precise year - if even there is a single discrete event). I've seen the abrupt change in economic trends attributed to different causes by different people:

- The end of the Bretton Woods monetary system

- The occurrence of peak domestic oil production in the US

- (now) removing the ability of senators to vote privately

...