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New Goods and the Transition to a New Economy
The analysis concentrates on the development of new consumer goods associated with technological progress, and suggests that between 1800 and 2000 economic welfare grew by at least 1.5 percent a year, and maybe as much 10 percent annually, the exact number depending upon the metric preferred.
Link
http://www.econ.rochester.edu/Faculty/GreenwoodPapers/n2n.pdf