Two firms together employ 10 units of labor (l) and 10 units of capital (k). The marginal

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Two firms together employ 10 units of labor (l) and 10 units of capital (k). The marginal rate of technical substitution of each firm is given by: MRTS1lk = k1/l1 and MRTS2lk = 4k2/l2. Which of the following input allocations satisfy the condition of input efficiency?
a) Firm 1 uses 5 units of labor, 5 units of capital; Firm 2 uses 5 units of labor, 5 units of capital.
b) Firm 1 uses 5 unit of labor, 8 units of capital; Firm 2 uses 5 units of labor; 2 units of capital.
c) Firm 1 uses 9 units of labor, 9 units of capital; Firm 2 uses 1 unit of labor; 1 unit of capital.
d) Firm 1 uses 2 units of labor; 5 units of capital; Firm 2 uses 8 units of labor; 5 units of capital.
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Microeconomics

ISBN: 978-0073375854

2nd edition

Authors: Douglas Bernheim, Michael Whinston

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