注）1-5
５ ハーバード大学戦略競争力研究所（The Institute for Strategy and Competitiveness, Harvard BusinessSchool, http : //www.isc.hbs.edu/）の定義によると以下のとおり。“A cluster is a geographically proximate group of interconnected companies and associated institutions in a particular field, including product producers, service providers, suppliers, universities, and trade associations. Clusters arise out of the linkages or externalities that span across industries in a particular location.”