"I've got to admit it's getting better, a little better all the time," sang Paul McCartney, in 1967. Sgt. Pepper's Lonely Hearts Club Band landed squarely in the middle of one of the most rapid periods of technological progress in all of human history, punctuated by the first human moon landing two years later.
But man last set foot on the moon 46 years ago. As easy as it is to assume economic progress is inevitable, the many endlessly long pit-stops of stagnation along human history tell otherwise, and today's economists are increasingly scrutinizing a stalling rate of innovation.
