Empirical evidence on productivity spillovers - a concept that embodies the fact that foreign enterprises own intangible assets which can be transmitted to domestic firms, thus raising their productivity level - is ambiguous. With a panel data set at the firm level for the Portuguese manufacturing industry, we aim to uncover the possibility that the choice of statistical techniques will have profound effects on evidence of spillovers diffusion. We will consider the panel data models commonly used in the literature and the recent and more robust Extended GMM technique, specially devised for panels with a small number of time periods. We find that positive spillovers occur only when the technologic gap between domestic and foreign firms is moderate. Though all methods agree on this result. there are differences worth to be noted, revealing that the traditional estimates can sometimes be misleading.
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Paper provided by Department of Economics at the School of Economics and Management (ISEG), Technical University of Lisbon. in its series Working Papers with number
2002/06.
Length: Date of creation: 2002 Date of revision: Handle: RePEc:ise:isegwp:wp62002
Contact details of provider: Postal: Department of Economics, School of Economics and Management (ISEG), Technical University of Lisbon, Rua do Quelhas 6, 1200-781 LISBON, PORTUGAL Web page: http://www.iseg.utl.pt/departamentos/economia/
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Find related papers by JEL classification: F21 - International Economics - - International Factor Movements and International Business - - - International Investment; Long-Term Capital Movements F23 - International Economics - - International Factor Movements and International Business - - - Multinational Firms; International Business O52 - Economic Development, Technological Change, and Growth - - Economywide Country Studies - - - Europe
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Frank Barr & Maria Paula Fontoura & Nuno Crespo, 2003.
"EU Enlargement and the Portuguese Economy,"
Working Papers
2003/06, Department of Economics at the School of Economics and Management (ISEG), Technical University of Lisbon..
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