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The productivity paradox : evidence from indirect indicators of service sector productivity growth
Wolff, Edward N., (1997)
Wolff, Edward N., (1999)
Measuring knowledge spillovers in manufacturing and services : an empirical assessment of alternative approaches
Kaiser, Ulrich, (1999)
Technologische kennis als economisch goed
Verspagen, Bart, (1999)
European 'regional clubs': do they exist, and where are they heading? : On economic and technological differences between European regions
Growth and structural change : trends, patterns and policy options
Verspagen, Bart, (2000)