“…Services play an increasingly important role in today's world economy, as observed, for example, by the growing share in employment, pro-duction, exports, and foreign direct investment, see e.g. OECD (1993), UNCTAD and World Bank (1994) and Van Marrewijk, Stibora and De Vaal (1996). This growing importance of services in domestic economies and international trade, acknowledged by the political forum as testified by the inclusion of services in the Uruguay Round negotiations, is largely due to an increase in the production of producer services, see Grubel andWalker (1989), andOECD (1992).…”