Supply and demand make up the market for goods and services. If more consumers are buying a particular product, there is a higher demand, and if more firms are producing the product, there is a higher supply.
Its a body of knowledge and examines the developments of the jointly constructed understanding of the world on the basis of the shared assumptions of reality. Theory centers on the notion that they are manged are developed and coordinated with other rather than separately within each and every individual and thus can be based on society.
