I believe the answer is; a<span> leader-exchange theory
The theory suggest that every time leaders make interactions with their subordinates, those subordinates would become more understanding of the leader's expectation and vision, which make them become more responsible and trustworthy for the leaders.</span>
In a free market economy, the price and distribution of goods and services is governed by the law of supply and demand. Producers or firms produce those services and goods that consumers are willing and able to pay for in the market.