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Positive externalities and public goods

2   Why invest in human capital?
2   Policy #1: government spending on research and development
3   Policy #2: tax breaks for research and development
4   Policy #3 cooperative research

Source:  OpenStax, Principles of economics. OpenStax CNX. Sep 19, 2014 Download for free at http://legacy.cnx.org/content/col11613/1.11