Top countries to visit in the world for A cluster of companies producing automotive parts has developed in the wider region around Detroit, with various forms of ties to the Big Three automobile firms. In Europe, small firms are frequently parts of regional networks (industrial districts), specialized in particular industries, that together attempt to achieve external economies of scale in RESEARCH AND DEVELOPMENT (R&D), production, and marketing. There is, for example, a fashion network (clothing, shoes, accessories, etc.) in northern Italy and a precision-machinery network in Germany, operating as horizontal clusters of equals rather than dependent suppliers to large firms. The Italian experience with, and theoretical work on, industrial districts built on ideas of the economist Alfred MARSHALL, has become a major point of reference in the international debate on regional policy promoting endogenous development. Entrepreneurship. Entrepreneurship and small business are not synonymous concepts, though it appears that the second implies the first. Top countries to visit in the world 2016.