Austan Goolsbee writes,

Perhaps the greater amount of uncertainty and churn in the world economy in the 1990s is the new norm. Perhaps the 21st century will continually favor those who adjust best to changes. As Professor Van Reenen put it, “If the world has become one in which everyone is trying to hit a moving target, it certainly helps to be the best at changing one’s aim.”

That neatly summarizes the concept of adaptive efficiency that I was trying to explain the other day.