What is perfect computation market ?what explain it please

Perfect competition is a market structure that leads to the Pareto-efficient allocation of economic resources.

Where are the following

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.