Education, Participation, and the Revival of US Economic Growth. Dale Jorgenson, October 1, 2015, Paper. "Labor quality growth represents the upgrading of the labor force through higher educational attainment and greater experience. While much attention has been devoted to the aging of the labor force and the ongoing retirement of the baby boomers, the looming plateau in average educational attainment of U.S. workers has been overlooked. The educational attainment of people emerging from the educational system, while high, has been nearly constant for the past several decades. Rising average educational attainment is about to become part of U.S. economic history. We define the participation rate for each age-sex group as the number of employed as a proportion of the population of that age group. This rate could also be called the employment participation rate." Link