We perform a growth accounting exercise using the whole neoclassical growth model for the u.s. economy during 1954-2017. Our growth accounting exercise reveals that the u.s. extraordinary economic growth in the 1960s has been mainly driven by the increase of the labor efficiency, whereas the growth slowdowns in the 19705 and the first decade of 21st century were mainly driven by the decline in the capital efficiency. However, the reduction of the distortions on the labor supply driven the subsequent recoveries in the 19805 and after the Great Recession.