Labor quality change, especially educational attainment, contributes positively to U.S. agricultural growth

Agricultural output in the United States nearly tripled between 1948 and 2017, with average annual output growth at 1.53 percent. While reduction of labor hours worked has contributed negatively, changes in labor quality have contributed positively to output growth over the years. Labor quality includes shifts in composition of demographic attributes, such as gender, age, educational attainment, employment type and other factors. ERS researchers group the study period into 12 sub-periods in accordance with U.S. economic business cycles (from peak to peak). Most of the contraction in total hours worked occurred between 1948 and 1969, during the expansionary period after World War II. By the 2007–17 economic business cycle, the decline in labor hours had its lowest negative effect on output growth, -0.16 percentage points. ERS researchers found that total labor quality had a positive effect on output growth in all economic business cycles except the 1979-81 period. The effects of labor quality on agricultural output growth were especially prominent before 1969. It accounted for nearly 25 percent of total output growth per year in the 1948–53, 1953–57, and 1960–66 subperiods, and 14 percent of annual output growth in the 1966-69 subperiod. Except for the period immediately after WWII, the major source of labor quality changes was an increase in educational attainment among farmworkers. On average, the increase in educational attainment accounted for more than 90 percent of the changes in labor quality between 1948 and 2017. Nevertheless, since 1969, the rise in educational attainment has slowed, and the overall influence of labor quality on output growth has diminished. This chart is drawn from the USDA, Economic Research Service report “Farm Labor, Human Capital, and Agricultural Productivity in the United States,” published Feb. 15, 2022.

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