Why governments should invest in early education.

By Barnett, W. S. (2008).

The fact that we can improve the learning, development, and life course of children through early educational investments does not mean that there is an economic rationale for such investments.  An  economic  case  for  such  investments  requires  estimates of  their  costs  and  benefits. Fortunately, three rigorous cost-benefit analyses have been conducted based on longitudinal studies through adulthood. These studies constitute a kind of Rosetta stone for interpreting the broader evidence on investments in early education.