Which of the following statements is correct? multiple choice between 1953 and 2015, increases in the quantity of labor account for more of the growth in u. s. real gdp than do increases in labor productivity. between 1953 and 2015, increases in labor productivity account for more of the growth in u. s. real gdp than do increases in the quantity of labor. between 1953 and 2015, increases in labor productivity and increases in the quantity of labor contributed equally to the growth in u. s. real gdp. between 1953 and 2015, all growth in u. s. real gdp can be attributed to increases in labor productivity.