Farmers make Gruyere cheese in the mountain pasture of 'Theraulaz d'en bas' in Switzerland.
Switzerland, ranked third last year, is prized for its policy stability and predictability.
Along with Sweden and Germany, IMD says that Switzerland is part of a group of European powerhouses that rely on diversified, export-driven economies and fiscal discipline to gain an edge.
Surveyed executives were less enthusiastic about cost competitiveness, the quality of corporate governance and the competency of government.