3Hall E R, Jones I C. Why do some countries produce so much more output per worker than others [J]. The Quarterly Journal of Economics, 1999, 114(1) : 83-116.
4Cubas G, Ravikumar B, Ventura G. Talent, labor quality and economic development[EB/OL]. (2013-04-01)[2014-04-14], http:// www.philadelphiafed, o rg/re s e arch- and-data/eve n ts/2013/macroe c on omic s-acro s s-time- and-space/papers/V e ntura0430, p dr.
