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.

Is Inequality the Price to Pay for Higher Growth in Middle-Income Countries?: Revisiting the Kuznets Hypothesis in the Event of Skill-Biased Technological Change
Gianluca Grimalda , Marco Vivarelli
Journal Of Evolutionary Economics, vol. 20, 2010, p. 265-306.