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. 2015 Aug 11;3:292. Originally published 2014 Dec 1. [Version 2] doi: 10.12688/f1000research.5775.2

Figure 10. Publications (reviews excluded) per R&D expenditure of the 20 countries with the highest GDP in the 5-year period 2008–2012.

Figure 10.

The numbers of publications (reviews excluded) were divided by the R&D expenditure of 2012 expressed as GERD (Gross Expenditures on Research and Development) in billion US$ at Purchasing Power Parity (PPP). The data of R&D expenditures of countries were taken from the Battelle nonprofit private company ( http://www.battelle.org/docs/tpp/2014_global_rd_funding_forecast.pdf).

Criteria A.