Data on the total number of persons who are mainly or partially employed in R&D. This includes staff employed both full-time and part-time. Headcount data reflect the total number of persons employed in R&D, independently from their dedication. These data allow links to be made with other data series, such as education and employment data, or the results of population censuses. They are also the basis for calculating indicators analysing the characteristics of the R&D workforce with respect to age, gender or national origin.
OECD (2002), Frascati Manual: Proposed Standard Practice for Surveys on Research and Experimental Development, §326-327.