“…By most definitions the growth sectors are intuitively recognizable: electronics, Standard Industrial Classification (SIC) 36; that part of the machinery industry, SIC 35, defined as computing equipment; chemicals and plastics, SIC 28 and SIC 30; aerospace production, SIC 37; and scientific instruments, SIC 38. These amount to Estall's 'A type' growth industries during the period from 1947 to 1967 [7]; they are industries with aboveaverage growth rates in the Federal Reserve production index, when cyclically adjusted IS]. It is interesting to note that, of all the BEA sectors, the leading growth industry is electronics.…”