Corporate R&D and Firm Efficiency: Evidence from Europe`s Top R&D Investors
Subal C. Kumbhakar,
Raquel Ortega-Argilés,
Lesley Potters,
Marco Vivarelli,
Peter Voigt
Journal Of Productivity Analysis,
vol. 37, 2012, p. 125-140.
R&D and Productivity: Testing Sectoral Peculiarities Using Micro Data
Raquel Ortega-Argilés,
Lesley Potters,
Marco Vivarelli
Empirical Economics,
vol. 41, 2011, p. 817-839.