Answer to Question #160941 in Microeconomics for Albert

Question #160941

The price of oil is $30 per barrel and the price elasticity is constant and equal to-0.5. An oil embargo reduces the quantity available by 20 percent. Use the arc elasticity formula to calculate the percentage increase in the price of oil.


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Expert's answer
2021-02-04T14:46:48-0500

Price  elasticity=Q2Q10.5×(Q1+Q2)P2P10.5×(P2+P1)0.5=0.2P2300.5×(P2+30)P230P2+30=0.2×0.50.5P230P2+30=0.2P230=0.2P2+60.8P2=36P2=45Price \; elasticity = \frac { \frac{Q_2 – Q_1}{0.5 \times (Q_1 + Q_2)} }{ \frac{P_2 – P_1}{0.5 \times (P_2 + P_1)} } \\ -0.5 = \frac {-0.2} { \frac{P_2 – 30}{0.5 \times (P_2 + 30)} } \\ \frac{P_2 - 30}{P_2 + 30} = \frac{0.2 \times 0.5}{0.5} \\ \frac{P_2 - 30}{P_2 + 30} = 0.2 \\ P_2 - 30 = 0.2P_2 + 6 \\ 0.8P_2 = 36 \\ P_2 = 45

Hence price is increased to $45

In terms of arc elasticity, price is increased by 33.33% and in terms of absolute change, price is increased by 50%.


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