Why do almost all models begin with assumptions?
What will be an ideal response?
Researchers develop a model that is a simplified description of reality to study a problem at hand. Real world phenomena are often very complex thus making them difficult to analyze in their true form. Therefore, assumptions are required to simplify complex phenomena and help researchers to make good predictions for the future.
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Refer to Table 14-2. Is the current strategy in which each firm charges the low price and earns a profit of $7,000 a Nash equilibrium? If not, why and what is the Nash equilibrium?
A) No, it is not a Nash equilibrium because each firm can do better by charging the high price. The Nash equilibrium occurs when each firm charges the high price and earns a profit of $10,000. B) No, the current situation is not a Nash equilibrium. The Nash equilibrium for each firm is to have the other charge a high price and for the firm in question charge a low price. C) Yes, the current situation is a Nash equilibrium. D) No, the current situation is not a Nash equilibrium; it is a dominant strategy equilibrium. There is no Nash equilibrium in this game.
The inauguration of a new President often increases the degree of optimism in foreign business firms and foreign households, causing net exports to
A) decrease and IS to shift right. B) decrease and IS to shift left. C) increase and IS to shift right. D) increase and IS to shift left.