Services industry sees less rapid productivity gains.
Therefore, services are an increasingly larger share of the economy.
This is an important fact, because some deindustrialization is needed.
Baumol, William J. 1967. “Macroeconomics of Unbalanced Growth: The Anatomy of Urban Crisis.” The American Economic Review 57 (3): 415–26. https://www.jstor.org/stable/1812111.
Baumol, William J., and William G. Bowen. 1968. Performing Arts, the Economic Dilemma: A Study of Problems Common to Theater, Opera, Music and Dance. M.I.T. Press.