@article {13996,
	title = {Relative Productivity Levels, 1947-1973: An International Comparison},
	journal = {European Economic Review},
	volume = {16},
	number = {1},
	year = {1981},
	note = {Productivity 2, ch. 5, pp. 297-331. },
	pages = {61-94},
	author = {Dale Jorgenson and L. R. Christensen and D. Cummings}
}
