For 1 $ invested the return is 8 $: what is this marvelous business?

http://www.minneapolisfed.org/publications_papers/pub_display.cfm?id=3832

http://www.ced.org/pdf/The-Productivity-Argument-for-Investing-in-Young-Children.pdf

http://www.nhsa.org/files/static_page_files/0610CCDD-1D09-3519-ADAF419AF96C38E0/Head_Start_Return_On_Investment_Brief_LAS-yv.pdf


Its name is young children education.