The four panels represent the automobile market as a result of assembly line adoption of new technology Panel (c).
A change in the price of the good or service is what drives a movement along the demand curve. Any non-price determinant of demand can change, resulting in a shift in the demand curve. The curve can go left or right. the tendency of a good's supply to rise in tandem with its price in a market.
Through the sale and maintenance of automobiles, auto manufacturing contributes $1.1 trillion to the economy annually and flows throughout the economy, from paychecks for assembly plant workers to income for auto-related small businesses to government revenue.
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