1. Estimate Demand
a. Suppose you are given this information from a consumer making rational, optimized decisions. Sketch a graph of demand for “theater movies” using the available data.
b. Estimate the linear demand curve (i.e., ??? = ? + ????) for “theater movies” that best approximates the data and add it to your graph.
c. What is the point (price and quantity) at which demand is “unit elastic”?
(a) Graph as follows.
(b) Using regression analysis, summary output as follows.
SUMMARY OUTPUT | ||||||
Regression Statistics | ||||||
Multiple R | 0.9113 | |||||
R Square | 0.8305 | |||||
Adjusted R Square | 0.7457 | |||||
Standard Error | 1.1916 | |||||
Observations | 4 | |||||
ANOVA | ||||||
df | SS | MS | F | Significance F | ||
Regression | 1 | 13.91027088 | 13.91027 | 9.7969 | 0.088702061 | |
Residual | 2 | 2.83972912 | 1.419865 | |||
Total | 3 | 16.75 | ||||
Coefficients | Standard Error | t Stat | P-value | Lower 95% | Upper 95% | |
Intercept | 9.2686 | 1.5618 | 5.9347 | 0.0272 | 2.5489 | 15.9883 |
Price | -0.3544 | 0.1132 | -3.13 | 0.0887 | -0.8416 | 0.1328 |
Estimated linear regression:
Price (P) = 9.2686 - 0.3544 x Quantity demanded (Qd)
(c) From demand function,
Qd = (9.2686 - P) / 0.3544
Point elasticity (E) = (dQd/dP) x (P/Qd) = -(1/0.3544) x [P / {(9.2686 - P) / 0.3544}]
E = - (1/0.3544) x [0.3544P / (9.2686 - P)]
E = - P / (9.2686 - P)
When demand is unit elastic, E = -1.
- P / (9.2686 - P) = -1
P / (9.2686 - P) = 1
P = 9.2686 - P
2P = 9.2686
P = 4.6343
Qd = (9.2686 - 4.6343) / 0.3544 = 4.6343 / 0.3544 = 13.0765
1. Estimate Demand a. Suppose you are given this information from a consumer making rational, optimized...
a. Suppose you are given this information from a consumer making rational, optimized decisions. Sketch a graph of demand for “theater movies” using the available data. Budget Price of Theater Movies Price of Home Videos Quantity of Theater Movies Quantity of Home Videos 100 20 2 3 25 100 15 2 3 25 100 10 2 5 25 100 6 2 8 25
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