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Mic 13
1.
Microeconomics
All Rights Reserved © Oxford University Press Malaysia, 2008 13– 1
2.
CHAPTER 13
Labour and Wages Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 2
3.
INTRODUCTION
Cobb-Douglas production model that shows the relationship between inputs and outputs is formalized by a production function of the form Q = f (K,L,M), where • Q represents the firm’s output of a particular good during a period. • K represents capital. • L represents labour input. • M represents raw material. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 3
4.
FOUR FACTORS OF
PRODUCTION AND THEIR PAYMENTS • Land - Rent • Labour - Wages • Capital - Interest • Entrepreneurship - Profit Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 4
5.
PAYMENT FOR FACTORS
OF PRODUCTION • When a new Information Technology (IT) college is set up to produce graduates for human capital specializing in IT, it needs lecturers to teach IT courses (mental labour), the physical space on which a college sit (land), a building, class room furniture and teaching enable classroom (capital), and the head of college or the CEO to manage the college (entrepreneurship). Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 5
6.
TYPES OF DEMAND
FOR FACTORS OF PRODUCTION Derived Demand Firm’s demand for factors of production derived from its decision to supply a good in another market. Joint Demand Production needs more than one factor of production. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 6
7.
THEORY OF MARGINAL
PRODUCTIVITY The demand for a factor depends on its marginal revenue product. The greater the productivity of the factor, the greater will be the demand for that particular product, ceteris paribus. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 7
8.
CONCEPTS IN MARGINAL
PRODUCTIVITY Total Physical product (TPP): The total output produced by employing the factors of production. Marginal Physical Product (MPP): The additional of total product as a result of employing one more unit of a factor. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 8
9.
CONCEPTS IN MARGINAL
PRODUCTIVITY (CON’T) Total Revenue Product (TRP): Total revenue gained by employing factors of production. Marginal Revenue Product (MRP): The additional total revenue as a result of employing one more unit of an input. It is also the demand curve of the factor and it is a downward sloping because of the law of diminishing return. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 9
10.
CONCEPTS IN MARGINAL
PRODUCTIVITY (CON’T) Monopolistic competition: MRP = MPP X MR Perfect competition: MPP X P/AR/ MR Marginal value product (MVP): Marginal product of an input times the prices of the output. MVP = MPP X P Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 10
11.
DETERMINATION OF EQUILIBRIUM
PRICE OF A FACTOR Labour markets are determined by the forces of demand and supply. The supply and demand for tomato pickers will determine the price wage and the number of tomato pickers. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 11
12.
THE VERSATILITY OF
DEMAND AND SUPPLY Supply and demand for tomato pickers determine the wage of the tomato pickers Panel (a) shows how the supply and demand for tomatoes determine the prices of tomatoes Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 12
13.
THE VERSATILITY OF
DEMAND AND SUPPLY (CON’T) Panel (b) shows how the supply and demand for tomatoes determine the wage of the tomato pickers Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 13
14.
WAGES AND WAGE
DIFFERENTIAL According to the Oxford Dictionary of Economics, wage is a payment for work performed by an employee. Wage differential is the difference in wage rates between two types of worker. It may be on account of different levels of skill, formal qualifications, between unionized and non- unionized firms, or between workers of different age, sex, or ethnic groups. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 14
15.
CHANGE IN WAGE
RATE Will change the motivation of individual to work longer hours. For example, with higher wage, people will agree to work overtime, less entertainment or leisure hours, or might retire later. Positively sloped and positive relationship between wage rate and labour supply. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 15
16.
TERM OF WAGES
Nominal wages refer to the wage or salary in terms of the particular currency of a country, in case of Malaysia is RM. Real wages refer to the purchasing power. For example, if a singer earns RM5000 for each concert, in terms of real wages it means how much the singer can purchase with that amount of income. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 16
17.
DEMAND FOR LABOUR:
THE MARGINAL PRODUCTIVITY THEORY Question: How many tomato pickers will be employed by the owner? The firm will answer this question by weighing up the costs of employing an extra labour against the revenue. In the labour markets, the firm will maximize profits where the marginal cost of hiring an extra worker equals the marginal revenue that the worker’s output earns for the firm. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 17
18.
DEMAND FOR LABOUR:
THE MARGINAL PRODUCTIVITY THEORY (CON’T) The profit-maximizing approach MC labour = MR labour Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 18
19.
MEASUREMENT OF MARGINAL
COST AND REVENUE OF LABOUR Marginal factor cost (MFCL): The amount an additional unit of variable unit (L) adds to the total cost. MFCL = ∆ Q TC/ ∆ L Marginal revenue of labour (MRPL): The amount an additional unit of the variable input (L) adds to total revenue. MFLL = MPPL X MPQ Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 19
20.
OPTIMAL USE OF
VARIABLE INPUT (L) The optimal level occurs at the point where the marginal benefits are equal to the marginal costs. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 20
21.
THE PROFIT MAXIMIZING
LEVEL OF EMPLOYMENT FOR A FIRM • The profit maximizing level is at point a. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 21
22.
THE PROFIT MAXIMIZING
LEVEL OF EMPLOYMENT FOR A FIRM (CON’T) Average and marginal physical product Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 22
23.
DERIVATION OF THE
FIRM’S DEMAND CURVE FOR LABOUR Wage rate at three different levels Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 23
24.
FACTORS THAT AFFECT
THE POSITION OF THE DEMAND FOR LABOUR • Wage rate • Productivity of labour • Demand for the good Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 24
25.
DERIVATION OF THE
INDUSTRY DEMAND CURVE FOR LABOUR When more workers are being employed, the total industry output will increase, and hence P (and MR) will be pushed down Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 25
26.
LABOUR SUPPLY Labour
is provided to labour markets by individuals who choose among available employment opportunities. A rational individual will refuse to work long hours, take early retirement and choose to work freelance. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 26
27.
UTILITY MAXIMIZATION A
person maximizes utility by choosing H* hours of leisure and consumption of C* Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 27
28.
THE OPPORTUNITY COST
OF LEISURE People have to bear the cost for each hour they do not work and it should be the real wage. Real wage is that people can turn their earnings into actual consumer goods. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 28
29.
INCOME EFFECT OF
A CHANGE IN THE REAL WAGE Income Effect (IE): A rise in wage tends to increase leisure. Since leisure is a normal good, the higher income resulting from a higher w increases the demand for it. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 29
30.
SUBSTITUTION EFFECTS OF
A CHANGE IN THE REAL WAGE (CON’T) Substitution Effect (SE): Effect of increase in w on the hours of leisure is to reduce it. As leisure becomes more expensive, there is reason to consume less of it. Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 30
31.
EFFECT OF AN
INCREASE IN WAGE RATE Figure 13.7 illustrates two different reactions to an increase in w Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 31
32.
MARKET SUPPLY CURVE
FOR LABOUR • Labour supply curves will always have positive slopes if people are willing to assume that in most substitution effects of wage changes will be more important than income effects. • SE>IE Microeconomics All Rights Reserved © Oxford University Press Malaysia, 2008 13– 32
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