The authors follow the new growth theory and develop and compare indicators for the educational and R&D systems of the U.S. and Germany.
Link
http://econpapers.repec.org/scripts/redir.pl?u=http%3A%2F%2Fwww.bwl.tu-darmstadt.de%2Fvwl%2Fforsch%2Fveroeff%2Fpapers%2Fddpie_138.pdf;h=repec:tud:ddpiec:138