The document discusses the evolution of industrial districts due to factors like market globalization, technology evolution, and network technologies. It states that market globalization imposes a planned approach to the market on companies and addresses economies of scale issues in research, engineering, marketing and financing. Technology evolution leads to new paradigms like e-commerce and new rules around quality, safety and the environment, impacting production cycles. This changing competitive context presents challenges for districts around human resources, training, internationalization, technological innovation and network technologies. The use of network technologies and e-commerce can change winners and losers among districts and alter local and global supplier networks.