Abstract
Since the beginning of the last century, the interest of economic science has been drawn to corporate interconnections, their connection with the financial system, the formation of alliances, and their relationship with political power. With the development of mathematics, especially graph theory, this interest was boosted. This chapter is intended as an introduction to matters related to the interconnection of corporates. Firstly, graph theory is analyzed at a rudimentary level, and its several forms are described that have been employed by economics, and social sciences in general. Two basic kinds of relationships are distinguished, which are then further specialized: interlocking directorate and interlocking ownership. An analysis is offered of these two aspects and their significance, along with an overview of the bibliography. The several forms of corporate interlocks existing worldwide are then presented in a broad outline. Following this, we focus on the cases found in Greek business networks. The lowest level of interconnections obtains, compared to the rest of Europe, and the similarities with the rest of the European countries are noted in the logic of the network’s articulation. Finally, the chapter concludes with the possibilities and prospects of research into social network analysis in business.