In 2002, I heard an economist characterizing this figure as containing a valuable economic insight. He wasn’t sure what the insight was. I have my own answer.
The economist talked of the figure as a sort of treasure map, which would lead us to the insight. “X” marks the spot. Dig here.
The graphic below tells three stories.
First, we see two distinct historic periods since World War II. In the first period, workers shared the gains from productivity. In the later period, a generation of workers gained little, even as productivity continued to rise.
The second message is the very abrupt transition from the post-war historic period to the current one...[+]