Over millennia, mankind has used hard cash in various forms ranging from shells to gold coins and paper. More recently, cash has become unpopular in political circles, as it effectively restricts states’ power to tax (explicitly or via negative interest rates) or to survey and potentially...

he economic concept of networks refers to the structure of agents` interaction as well as to the economic property of positive externalities. This book describes the economics of networks from various perspectives among which are¤ classical approaches, methods derived from physics, theory of...