Two goods have a cross-price elasticity of demand of +1.2 (a) would you describe the
goods as substitutes or complements? (b) If the price of one of the goods rises by 5 per
cent, what will happen to the demand for the other good, holding other factors constant?
(a) The goods are substitute goods since they have a positive cross-price elasticity of demand.
(b) If the price of one of the two goods increases by 5 per cent, it will be substituted by the other good so that the quantity demanded of this other good will increase. With positive cross-price elasticity being equal to 1.2, the quantity demanded of the other good will increase by 1.2\*5\%=6\%1.2×5%=6%
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