@techreport{NBERw5049,
 title = "Trade in Ideas: Patenting and Productivity in the OECD",
 author = "Jonathan Eaton and Samuel Kortum",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "5049",
 year = "1997",
 month = "May",
 URL = "http://www.nber.org/papers/w5049",
 abstract = {We develop and estimate a model of technological innovation and its contribution to growth at home and abroad.  International patents indicate where innovations come from and where they are used. Countries grow at a common steady-state rate.  A country's relative productivity depends upon its capacity to absorb technology.  We estimate that, except for the United States, OECD countries derive almost all of their productivity growth from abroad.},
}