The demand and supply functions for three interdependent commodities are QD1 = 15 - P1 + 2P2 + P3 QD2 = 9 + P1 - P2 - P3 QD3 = 8 + 2P1 - P2 - 4P3 QS1 = -7 + P1 QS2 = -4 + 4P2 QS3 = -5 + 2P3 where QDi, QSi and Pi denote the quantity demanded, quantity supplied and price of good i, respectively. Determine the equilibrium price and quantity for this three-commodity model.
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The demand and supply functions for three interdependent commodities are
QD1 = 15 - P1 + 2P2 + P3
QD2 = 9 + P1 - P2 - P3
QD3 = 8 + 2P1 - P2 - 4P3
QS1 = -7 + P1
QS2 = -4 + 4P2
QS3 = -5 + 2P3
where QDi, QSi and Pi denote the quantity demanded, quantity supplied and price of good
i, respectively. Determine the equilibrium price and quantity for this three-commodity
model.
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- 23. Consider a simple economy with just two industries: farming and manufacturing. Farming consumes 1/2 of the food and 1/3 of the manufactured goods. Manufacturing consumes 1/2 of the food and 2/3 of the manufactured goods. Assuming the economy is closed and in equilibrium, find the relative outputs of the farming and manufacturing industries.2. Suppose that in Example 2.27, 400 units of food A, 500 units of B, and 600 units of C are placed in the test tube each day and the data on daily food consumption by the bacteria (in units per day) are as shown in Table 2.7. How many bacteria of each strain can coexist in the test tube and consume all of the food? Table 2.7 Bacteria Strain I Bacteria Strain II Bacteria Strain III Food A 1 2 0 Food B 2 1 3 Food C 1 1 1Determine the equilibrium prices of three interdependent commodities that satisfyP1 + 3P2 + 3P3 = 32P1 + 4P2 + 3P3 = 37P1 + 3P2 + 4P3 = 35
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