Demand for a commodity, the service also can depend on the speculation about the price of consumer goods in the future. The people rushed to buy the iphone in recent times because of demand or run under the era but also many people after a while they just bought is do they predict the iphone price 6 plus will decrease in the coming time when demand for it will gradually decrease. Typically, consumers will buy more goods, more services when they predict the future price of commodities, services that increase and vice versa.
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