The price of a good or service (example of the price of a baguette of bread in Cotonou) is the result of a meeting mechanism between supply (production by enterprises, bakeries in the example of bread) and the demand for this good/service expressed by consumers. At the micro level, price control in an economy is very important. Indeed, the anticipations formulated by the companies on the prices make it possible to determine the optimal level of production, and on the side of the households its anticipations make it possible to optimize the behavior of consumption... (download to see the entire publication)