但是，泰勒·柯万（Tyler Cowen）在其《大停滞 》 （ The Great Stagnation）一书中指出，这些“低处的果实”被摘取殆尽后，进入20世纪70年代以来，提振增长就变得日益困难了。
But, as Tyler Cowen has argued in his book The Great Stagnation, once these “low-hanging fruit” were plucked, it became much harder to propel growth from the 1970’s onward.