Note: This is an old post, reproduced today in honor of American Senator and presidential candidate Bernie Sanders

In the previous installment:

I explained how the general standard of living in America, denoted by real income, grew a great deal between 1975 and a recent date, specifically, 2007. This, in spite of a widespread rumor to the contrary. The first installment touched only a little on the following problem: It’s possible for overall growth to be accompanied by some immobility and even by some regress. Here is a made-up example:

Between the first and the second semester, grades in my class have, on the average, moved up from C to B. Yet, little Mary Steady’s grade did not change at all. It remained stuck at C. And Johnny Bad’s grade slipped from C to D.

Flummoxed by the sturdiness, the blinding obviousness of the evidence regarding general progress in…