In addition, a few countries have pursued active industrial policies, promoting sectors where they can expect to have a dynamic comparative advantage. Small developing countries may in turn rely on FDI as a vehicle of industrial policy, as in Costa Rica. A third approach is microeconomic in nature, relying on a long-term alliance between the public and private sector to support the generation of sector-specific research and knowledge and public infrastructure in areas with a potential comparative advantage. This has been effective in Chile in the case of wood, fresh fruit, wine and salmon.