Understanding Supply, Cost, and Revenue in Economics
Supply Fundamentals
- Supply indicates the amount of a good a seller is willing and able to produce at each price point.
- The quantity supplied and supply are distinct concepts. The quantity supplied is the specific amount a firm is willing and able to produce at a particular price.
- The Law of Supply states that the quantity supplied increases as the price rises. This demonstrates a direct relationship between price and quantity supplied.
- Movements along the supply curve are caused exclusively by a change
Core Concepts and Econometrics in Labor Market Analysis
Section 1: Labor Demand Basics
- Firms hire workers up to the point where the wage equals the Value of Marginal Product (VMP).
- VMP = P × MP (where P = price of output, MP = marginal product of labor)
- Downward-sloping labor demand due to diminishing marginal returns to labor.
Section 2: Labor Supply and Elasticity
- Labor supply reflects the tradeoff between leisure and work.
- Reservation wage: the minimum wage a person is willing to accept for a job.
- Effects of wage increase:
- Substitution effect: work is more
Industrial Organization: Monopoly, Competition, and Strategy
Early Models of Industrial Organization
- Cournot (1838): Used mathematics to study economics, price formation with a single supplier (monopoly), and oligopoly with simultaneous quantity setting.
- Bertrand (1883): Analyzed oligopoly with simultaneous price setting.
- Stackelberg (1934): Studied sequential setting of quantities in an oligopoly.
- Hotelling (1929) and Chamberlin (1933): Introduced the concept of product differentiation.
Schools of Thought in Industrial Organization
The Harvard School (1940s)
Key
Read MoreMicroeconomics Practice Questions: Trade, Utility, and Externalities
Microeconomics Practice: Trade, Utility, and Market Failure
1. Comparative Advantage and Trade (Refer to Figure 1)
Refer to Figure 1. From the figure, it is apparent that:
- New Zealand will experience a shortage of wool if trade is not allowed.
- New Zealand will experience a surplus of wool if trade is not allowed.
- New Zealand has a comparative advantage in producing wool, relative to the rest of the world. (C)
- Foreign countries have a comparative advantage in producing wool, relative to New Zealand.
2.
Read MoreMarket Structures: Perfect Competition vs. Monopoly Profit Analysis
Profit Functions and Market Differences
The general profit function is defined as Profit = Total Revenue (TR) – Total Cost (TC).
For a perfectly competitive firm, the profit function is: π = p · y – c(y). Here, p represents the market price, and y is the quantity produced. The firm is a price taker, meaning the price is independent of its output.
For a monopolist, the profit function is: π = p(y) · y – c(y). In this case, p(y) signifies that the price is a function of the quantity produced.
Read MoreEssential Economic Concepts: Supply, Demand, and Market Dynamics
Key Economic Concepts Defined
Economy: Basic Principles
The economy is the science that deals with the study of the satisfaction of human needs with scarce resources that have alternative uses, from which choices are made.
Economics: A Political Science
Economics is the political science that studies the laws governing the production, distribution, circulation, and consumption of material goods to satisfy human needs.
Bid: Buyer’s Willingness to Purchase
Bid: The amount of goods that buyers are willing
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