Principles of Macroeconomics (MindTap Course List)
Principles of Macroeconomics (MindTap Course List)
8th Edition
ISBN: 9781305971509
Author: N. Gregory Mankiw
Publisher: Cengage Learning
Question
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Chapter 2, Problem 1CQQ
To determine

The definition of an economic model.

Expert Solution & Answer
Check Mark

Answer to Problem 1CQQ

Option “c” is correct.

Explanation of Solution

Option (c):

The economic model can be defined as the simplified representation of some aspects of an economy or a simplified framework of a real, complex world. The economist uses the models for the generation of different economic ideas, new concepts, formulation of new principles, solving the questions in the economy, forecasting demand patterns, and so forth. Sometimes, economists use an existing model to analyze a real world problem or issues, but in other cases, they have to develop new models. Thus, option “c” is correct.

Option (a):

An economic model is not a mechanical machine that replicates the functioning of the economy but is just model of a real situation of economy that is made by an economist. Thus, option “a” is incorrect.

Option (b):

An economic model is not a fully-detailed, realistic description of the economy,  as it is a representation of a real, complex situation. But, it can’t describe the reality precisely. Thus, option “b” is incorrect.

Option (d):

A model is not a computer program for predicting the future of the economy. It is a small, simplified version of different economic aspects. Thus, option “d” is incorrect.

Economics Concept Introduction

Concept introduction:

Economic model: Economic models are the simplified versions of reality used to analyze real-world economic situation and issues.

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a) Assume there are two firms, 1 and 2, competing as Cournot duopolists in a market, selling a homogeneous product. Demand is given by p = 36 – (q1 + q2), where p is price and q1 and q2 are the outputs of firms 1 and 2 respectively. Each firm faces a marginal cost of 6 per unit of output and no fixed cost. Find each firm’s optimal output, the price at which they sell, each firm’s profit , and consumer surplus.  b) Now assume that the firms face the same costs, but horizontally differentiate their product, so that firm 1 faces demand p1 = 36 – (q1 + q2/2) and firm 2 faces demand p2 = 36 – (q1/2 + q2). Assume Cournot competition. Calculate the new equilibrium prices and outputs for each firm, consumer surplus and profits.  c) Now assume that rather than facing a given degree of product differentiation, the firms can choosehowdifferentiatedtheirproductsare.Thisisequivalenttoinversedemandequationsp1 =36 –(q1 +θq2)andp2 =36–(θq1 +q2),0≤θ≤1,withθdeterminedbythefirms’choicesofproduct…
Assume there are two firms, 1 and 2, competing as Cournot duopolists in a market, selling a homogeneous product. Demand is given by p = 36 – (q1 + q2), where p is price and q1 and q2 are the outputs of firms 1 and 2 respectively. Each firm faces a marginal cost of 6 per unit of output and no fixed cost. Find each firm’s optimal output, the price at which they sell, each firm’s profit , and consumer surplus.
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