Answered: C� = 2.38 - 0.006153Q� +…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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Question

A study of 86 savings and loan associations in six northwestern states yielded the following cost function.

C�	=	2.38	-	0.006153Q�	+	0.000005359Q2�2	+	19.2X1�1
		(2.86)		(3.08)		(3.68)		(2.96)

where C� = average operating expense ratio, expressed as a percentage and defined as total operating expense ($ million) divided by total assets ($ million) times 100 percent.

Q� = output; measured by total assets ($ million)

X1�1 = ratio of the number of branches to total assets ($ million)

Note: The number in parentheses below each coefficient is its respective t-statistic.

Which of the variable(s) is (are) statistically significant in explaining variations in the average operating expense ratio? (Hint: t0.025,70=1.99�0.025,70=1.99.) Check all that apply.

Q�

Q2�2

X1�1

What type of average cost-output relationship is suggested by these statistical results?

Quadratic

Cubic

Linear

Based on these results, what can we conclude about the existence of economies or diseconomies of scale in savings and loan associations in the Northwest?

Diseconomies of scale at lower output levels and economies of scale at higher output levels

Economies of scale at lower output levels and diseconomies of scale at higher output levels

Diseconomies of scale at all output levels

Economies of scale at all output levels

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