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Nevertheless, some services sectors, in particular international finance and maritime transport, have been largely open for centuries as the natural complements to merchandise trade. Other large sectors have undergone fundamental technical and regulatory changes in recent decades, opening them to private commercial participation and reducing, even eliminating, existing barriers to entry. The emergence of the Internet has helped to create a range of internationally tradeable product variants from e-banking to tele-health and distance learning that were unknown only two decades ago, and has removed distance-related barriers to trade that had disadvantaged suppliers and users in remote locations (relevant areas include professional services such as software development, consultancy and advisory services, etc.). A growing number of governments has gradually exposed previous monopoly domains to competition; telecommunication is a case in point.
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