Jaydon’s utility is estimated to be U(q1,q2)=20q1^0.5q2^0.5. Jaydon has an income of 500, p1 = 10, and p2 = 20. Suppose the price of good 2 decreased to 10, while p1 and income remain the same. Find the values of the total effect, the substitution effect, and the income effect of the change in p2 on the demand of good 1 and good 2.
Using marshellian std demand fn
q1 = a/a+b *m/p1
q2=b/a+b *m/p2
where a and b are powers attached to q1 and q2
q1 = 0.5/0.5+0.5 * m/p1 = 0.5* 500/10 = 25
q2 = 0.5/0.5+0.5 *m/p2 = 0.5* 500/20 = 12.5
now we we calculate m' ( orginal bundles with new prices)
m' = 25*10 + 12.5*10 = 375
now using above formulas for q1 and q2 at m' at new prices
q2'' = 0.5 *375/10 = 18.75
now finally calculating q2 at m and new price
q2' = 0.5* 500/10 = 25
T.e = q2' - q2 = 25 - 12.5 = 12.5
s.e = q2'' - q2 = 18.75 - 12.5 = 6.25
i.e = t.e - s.e = 12.5 - 6.25 = 6.25
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