Which one of the following changes does not cause a demand curve shift?

Question

BlackTom AI · Accepted Answer

Question restatement: The prompt asks which of the following changes does not cause a demand curve shift.
Option 1: Change of prices of substitutes or complements. This affects demand because substitution and complement relationships change consumers' willingness to buy at each price, shifting the demand curve.
Option 2: Change of consumer preferences. A shift in what consumers prefer leads to more or less demand at every price, moving the entire demand curve.
Option 3: Consumer incomes change. For most goods, higher income increases quantity demanded at each price, shifting the demand curve (normal goods), while for inferior goods it can reduce demand; either way, the curve shifts.
Option 4: Production technology change. This primarily impacts the supply side: improved production technology lowers production costs, allowing more to be supplied at each price, which shifts the supply curve, not the demand curve.
In sum, options 1–3 describe factors that alter demand and thus shift the demand curve, whereas option 4 describes a factor that alters supply and does not shift the demand curve. The distinction hinges on whether the factor affects consumers' willingness to purchase at each price (demand) versus the seller’s ability to supply at each price (supply). Therefore, production technology change does not cause a demand curve shift; it affects the supply curve instead.

Which one of the following changes does not cause a demand curve shift? 单项选择题

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