Goods X and Y are perfect compliments (left and right shoes, computers and operating systems, etc.). Show graphically the substitution and income effects for a price increase in X
In case of perfect complements the goods are consumed in fixed proportions and the indifference curves are L shaped and we operate at the kink. Under perfect complements, the substitution effect is 0 and the entire price effect is made up by the income effect. This is given in the figure below. Thus the price increase causes the budget line to swing inwards and we move from the point A to the point B. As we operate on the kink the substitution effect is 0 and the entire change from X2 to X1 is due to the income effect.
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