Which of the following events could shift both the demand curve and the supply curve for a good?

a. A technological advance pertaining to the production of the good is observed. 

b. Incomes of all buyers of the good increase. 

c. The number of sellers of the good increases. 

d. Everyone revises upward their expectation of next month’s price of the good.


Answer: d. Everyone revises upward their expectation of next month’s price of the good.

Economics

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