The Low-Hanging Fruit Theory of Innovation Is Only Half Right
A familiar theory of innovation says that progress becomes harder because the low-hanging fruit is picked first. Early discoveries lie close at hand; later advances require larger machines, larger teams, deeper specialisation and more money. Nicholas Bloom, Charles I. Jones, John Van Reenen and Michael Webb developed an influential empirical version of this argument in “Are Ideas Getting Harder to Find?” . Across semiconductors, agriculture, medicine and firm-level innovation, they found research effort rising substantially while measured research productivity declined. Their most striking example is Moore’s Law: maintaining the historical rate of improvement in chip density requires far more researchers than it did in the early 1970s. There is considerable truth in this. Mature fields accumulate technical difficulty. Once obvious routes have been explored, the remaining work often requires greater precision, more infrastructure and command of a much larger body of knowledge. The m...