Public funds additionality in R&D expenditure in presence of essential heterogeneity: an empirical investigation using the Italian CIS3 data
2012 ◽
Vol 9
(2/3/4)
◽
pp. 221
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1994 ◽
Vol 55
(3)
◽
pp. 407-431
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1979 ◽
Vol 12
(2)
◽
pp. 82-86