What level of education matters most for growth?: Evidence from Portugal
Economics of Education Review
Volume 28, Issue 1, February 2009, Pages 67-73
URL:[url=http://dx.doi.org/10.1016/j.econedurev.2007.12.001]http://dx.doi.org/10.1016/j.econedurev.2007.12.001


Comparing macroeconomic returns on human and public capital: An empirical analysis of the Portuguese case (1960–2001)

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Journal of Policy Modeling
Volume 27, Issue 5, July 2005, Pages 585-598
http://dx.doi.org/10.1016/j.jpolmod.2005.03.002[/url]