Demand for the goods or services will change depending on the expectations, the expectations of consumers. People have expectations about income, tastes, the number of consumers, ... All the expectations are impacting demand. For example, consumers expect that in the future the price of goods will increase, they will buy more goods that than now. The expectations also depends heavily on the subjective wishes of the people, on their receiving information as to how and what we have to handle the review, finally giving the decision to maximize its benefits.
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