Katrin Hussinger, "R&D and Subsidies at the Firm Level: An Application 
of Parametric and Semiparametric Selection Models", Journal of Applied 
Econometrics, Vol. 23, No. 6, 2008, pp. 729-747.

The data used in this paper are taken from several different sources, 
some of which are confidential. Detailed innformation about the data and 
how they may be obtained is provided in the file kh-data-info.pdf.

See also the file kh-data-sources.txt

Katrin Hussinger
k.hussinger [AT] os.unimaas.nl