ABSTRACT
This part introduction presents an overview of the key concepts discussed in the subsequent chapters. The part presents a question in the framework of the setting up by experimental economics of technical devices orienting the choice of actors towards more rational decisions on the meaning of economic theory. It focuses on the construction of financial reality by the Black-Scholes-Merton equations on the Chicago stock exchange in the 1970s. The model has never really sculpted the world in its image, so it comes up against a financial phenomenon imposing changes: the financial crash of 1987. If the theory can stumble on the validity of a mechanism, the part explores the way in which existing conventional facts can block performative phenomena. It also explores the constitutive convention of a representation of the organ which calls into question the establishment of the market as a matching structure.
