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MANAGERIAL ECONOMICS An Analysis of Business Issues   Howard  Davies and Pun-Lee Lam Published by FT Prentice Hall
Chapter 1: The Definition and Scope of Managerial Economics Objectives: After studying the chapter, you should understand: 1. the subject matter of Managerial Economics 2. the analytical approach used in Managerial Economics
What is Managerial Economics? Douglas  -  “Managerial economics is .. the application of economic principles and methodologies to the decision-making process within the firm or organization.” Pappas & Hirschey  - “Managerial economics applies economic theory and methods to business and administrative decision-making.” Salvatore  - “Managerial economics refers to the application of economic theory and the tools of analysis of decision science to examine how an organisation can achieve its objectives most effectively.”
What is Managerial Economics? Howard Davies and Pun-Lee Lam -  “ It is the application of economic analysis to business problems; it has its origin in theoretical microeconomics.”
These Definitions Cover a Number of Different Approaches 1. Analysis based on the theory of the firm 2. Analysis based upon management sciences 3. Analysis based upon industrial economics  Related to, but not the same as management science and industrial economics.
The Process of Model-building ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Definitions & assumptions Predictions If predictions not supported by data, model is amended or discarded If predictions  borne out by  data, the model  is valid, for  the moment Theoretical analysis Predictions tested against data
Should Assumptions be Realistic? The assumption of profit- maximising  may be unrealistic or inaccurate However, what matters is the explanatory or predictive power of a theory (or model), not the descriptive realism of its assumptions. A model built on unrealistic assumptions may give good predictions. Assumptions are a necessary simplifying device Example: Overtaking
What Is A “Good” Model? ,[object Object],[object Object],[object Object]
The Use of Economic Models Positive Economics:- Derives useful theories with testable propositions about WHAT IS. Normative Economics:- Provides the basis for value judgements on economic outcomes.WHAT SHOULD BE
Managerial Economics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Economic Analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is the purpose of economic analysis? Why do we want to apply economic analysis to business problems? For the academic economist :  to understand, to make predictions about firm’s behavior   The “ positive ” approach to theory: What is? For the businessperson :  “to assist decision-making”, to provide decision-rules which can be applied  The “ normative ” approach to theory: What should be? These purposes are different, they can lead to misunderstanding, and economists are not always honest about the  limitations  of their approach for practical purposes.
What are these limitations? If the aim is prediction, unrealistic assumptions are acceptable and may be needed; for instance, the firm may be assumed to behave “as if” its managers had perfect knowledge of its environment If the aim is to produce decision-rules which can be applied by practising managers, unrealistic assumptions will produce decision-rules which are not operational for instance, set output and price by MC=MR
How Can Managerial Economics Assist Decision-Making? 1. Adopt a general perspective, not a  sample of one 2. Simple models provide stepping stone to more complexity and realism 3. Thinking logically has value itself and can expose sloppy thinking
Why Managerial Economics? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
In  industrial economics (or industrial organization) , the emphasis is (or was) upon the behavior of the whole industry, in which the firm is simply a component. In  managerial economics , the emphasis is upon the firm, the environment in which the firm finds itself, and the decisions which individual firms have to take. Links between Managerial Economics and Industrial Economics
What is Industrial Organization? It  studies how the performance of an industry is related to its structure, that is, to the number and size of firms it contains. It is the study of markets for goods and of the firms which produce them. It is the study of industry. It is more concerned with why markets are structured the way they are and behave the way they do.
[object Object],[object Object],[object Object],[object Object],[object Object]
The Structure-Conduct-Performance Paradigm: Basic Conditions : factors which shape the market of the industry, e.g. demand, supply, political factors Structure : attributes which give definition to the supply-side of the market, e.g. economies of scale, barriers to entry, industry concentration, product differentiation, vertical integration. Conduct : the behavior of firms in the market, e.g. pricing behavior advertising, innovation. Performance : a judgement about the results of market behaviour, e.g. efficiency, profitability, fairness/income distribution, economic growth. How can the government improve the performance in an industry?
Basic Conditions Structure Conduct Performance Government Policy
Management science:  is essentially concerned with techniques for the improvement of decision-making and hence it is essentially normative;firms are not assumed to find the optimal solutions for themselves. They are found by the researchers who then present them as prescriptions for what the firm should do.   Managerial economics:  is often concerned with finding optimal solutions to decision problems.However, the primary purpose of using models is to predict how firms will behave, not to advise them what ought to do. Managers are assumed to find the optimal solutions for themselves and that is how predictions are made. Links between Managerial Economics and Management Science

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M.e

  • 1. MANAGERIAL ECONOMICS An Analysis of Business Issues Howard Davies and Pun-Lee Lam Published by FT Prentice Hall
  • 2. Chapter 1: The Definition and Scope of Managerial Economics Objectives: After studying the chapter, you should understand: 1. the subject matter of Managerial Economics 2. the analytical approach used in Managerial Economics
  • 3. What is Managerial Economics? Douglas - “Managerial economics is .. the application of economic principles and methodologies to the decision-making process within the firm or organization.” Pappas & Hirschey - “Managerial economics applies economic theory and methods to business and administrative decision-making.” Salvatore - “Managerial economics refers to the application of economic theory and the tools of analysis of decision science to examine how an organisation can achieve its objectives most effectively.”
  • 4. What is Managerial Economics? Howard Davies and Pun-Lee Lam - “ It is the application of economic analysis to business problems; it has its origin in theoretical microeconomics.”
  • 5. These Definitions Cover a Number of Different Approaches 1. Analysis based on the theory of the firm 2. Analysis based upon management sciences 3. Analysis based upon industrial economics Related to, but not the same as management science and industrial economics.
  • 6.
  • 7. Definitions & assumptions Predictions If predictions not supported by data, model is amended or discarded If predictions borne out by data, the model is valid, for the moment Theoretical analysis Predictions tested against data
  • 8. Should Assumptions be Realistic? The assumption of profit- maximising may be unrealistic or inaccurate However, what matters is the explanatory or predictive power of a theory (or model), not the descriptive realism of its assumptions. A model built on unrealistic assumptions may give good predictions. Assumptions are a necessary simplifying device Example: Overtaking
  • 9.
  • 10. The Use of Economic Models Positive Economics:- Derives useful theories with testable propositions about WHAT IS. Normative Economics:- Provides the basis for value judgements on economic outcomes.WHAT SHOULD BE
  • 11.
  • 12.
  • 13. What is the purpose of economic analysis? Why do we want to apply economic analysis to business problems? For the academic economist : to understand, to make predictions about firm’s behavior The “ positive ” approach to theory: What is? For the businessperson : “to assist decision-making”, to provide decision-rules which can be applied The “ normative ” approach to theory: What should be? These purposes are different, they can lead to misunderstanding, and economists are not always honest about the limitations of their approach for practical purposes.
  • 14. What are these limitations? If the aim is prediction, unrealistic assumptions are acceptable and may be needed; for instance, the firm may be assumed to behave “as if” its managers had perfect knowledge of its environment If the aim is to produce decision-rules which can be applied by practising managers, unrealistic assumptions will produce decision-rules which are not operational for instance, set output and price by MC=MR
  • 15. How Can Managerial Economics Assist Decision-Making? 1. Adopt a general perspective, not a sample of one 2. Simple models provide stepping stone to more complexity and realism 3. Thinking logically has value itself and can expose sloppy thinking
  • 16.
  • 17. In industrial economics (or industrial organization) , the emphasis is (or was) upon the behavior of the whole industry, in which the firm is simply a component. In managerial economics , the emphasis is upon the firm, the environment in which the firm finds itself, and the decisions which individual firms have to take. Links between Managerial Economics and Industrial Economics
  • 18. What is Industrial Organization? It studies how the performance of an industry is related to its structure, that is, to the number and size of firms it contains. It is the study of markets for goods and of the firms which produce them. It is the study of industry. It is more concerned with why markets are structured the way they are and behave the way they do.
  • 19.
  • 20. The Structure-Conduct-Performance Paradigm: Basic Conditions : factors which shape the market of the industry, e.g. demand, supply, political factors Structure : attributes which give definition to the supply-side of the market, e.g. economies of scale, barriers to entry, industry concentration, product differentiation, vertical integration. Conduct : the behavior of firms in the market, e.g. pricing behavior advertising, innovation. Performance : a judgement about the results of market behaviour, e.g. efficiency, profitability, fairness/income distribution, economic growth. How can the government improve the performance in an industry?
  • 21. Basic Conditions Structure Conduct Performance Government Policy
  • 22. Management science: is essentially concerned with techniques for the improvement of decision-making and hence it is essentially normative;firms are not assumed to find the optimal solutions for themselves. They are found by the researchers who then present them as prescriptions for what the firm should do. Managerial economics: is often concerned with finding optimal solutions to decision problems.However, the primary purpose of using models is to predict how firms will behave, not to advise them what ought to do. Managers are assumed to find the optimal solutions for themselves and that is how predictions are made. Links between Managerial Economics and Management Science