In most cases mathematical models of economics abstract from the influence of the information factors. The real supervision show, that the price of the information can render serious influence on many base economics laws, for example law of a uniform price. It is obvious, that in the real market there is a not price point, and we have some price interval, inside which each of the consumers carries out the choice. The similar situation becomes possible for want of their various awareness. Then the classical model of consumer choice

In this case price of each good develops of the actually price of this good plus of the price of the conjuncture information about this good. Thus, the informed consumer actually reduces the price of the consumed good that increases his budget and can change optimal choice. The researches of the modified with allowance of the information price the model of consumer choice conducted for a individual kinds of the utility functions (linear, Leontieff, Cobb-Douglas, Stone) have enabled to evaluate character and degree of influence of the conjuncture information on structure and volumes of consumption of the acquired goods.