Economics: Firms and Markets for Goods and Services - Module 3 Notes

Module Objectives

  • Understanding Firm Types: Differentiate between price-taking firms (e.g. perfectly competitive firms) and price-setting firms (e.g. monopolies).

  • Demand and Supply Curve Analysis: Identify factors that lead to shifts in demand and supply curves in competitive markets.

  • Supply and Demand Model Analysis: Analyze interactions in supply and demand under competitive conditions where no firm holds market power.

Introduction to Markets

  • Definition of Market: A market consists of buyers and sellers of particular goods or services.

  • Key Questions in Economics:

    • Why are there many firms in some markets but few in others?

    • Should government intervene in markets?

  • Characteristics of a Market:

    • Product: The goods and services exchanged.

    • Buyers and Sellers: Engaged in voluntary exchange.

Competitive Equilibrium: Key Concepts

  • Demand Curve: Reflects the total quantity that consumers are willing to purchase at various prices.

    • Willingness to Pay (WTP): Represents the maximum price a consumer is willing to pay for a good.

    • Example: Second-hand textbook market.

  • Supply Curve: Reflects the total quantity that producers are willing to sell at various prices.

    • Willingness to Accept (WTA): Represents the minimum price a seller is willing to accept for a good.

    • The relationship between price and quantity supplied is positive.

Equilibrium Price

  • Characteristics of Equilibrium:

    • Occurs when quantity supplied equals quantity demanded.

    • At this price, resources are allocated efficiently (Pareto efficiency).

    • Price-taking firms cannot influence market price; they must accept the equilibrium price.

Factors Affecting Equilibrium

  • Demand Shifters: Three main factors that shift demand include:

    • Income: Income increases tend to shift the demand for normal goods to the right.

    • Tastes/Preferences: Changes in consumer preferences can increase or decrease demand.

    • Population: An increase in population usually leads to an increase in market demand.

  • Supply Shifters: Three main factors that shift supply include:

    • Prices of Inputs: A decrease in input costs typically increases supply.

    • Technological Advancements: Innovations that improve production efficiency can shift supply rightward.

    • Number of Sellers: An increase in the number of firms can lead to an increase in total supply.

Demand and Supply Analysis: Market Shocks

  • Exogenous Shocks: External factors that cause shifts in demand or supply.

    • Example: Improved baking technology shifts the supply curve for bread rightward, reducing prices.

  • Simultaneous Shifts: When both demand and supply curves shift simultaneously, the effect on price can be indeterminate, but quantity will increase.

    • Example: If demand increases faster than supply, equilibrium price increases; if supply increases more than demand, equilibrium price decreases.

Case Studies of Market Applications

  • World Quinoa Market: Factors affecting price fluctuations, demand increase from health trends, and supply constraints in production regions.

  • Australian Avocado Market: Examination of price dynamics from 2016 to 2021 influenced by both increasing demand and fluctuating supply.

Summary

  • Modeling Firm Types: Understand price-taking vs. price-setting firms and the implications for market operations.

  • Competitive Equilibrium Analysis: Analyze equilibrium conditions, the efficiency of resource allocation, and the impact of market shocks.

  • Real-World Applications: Apply theoretical concepts to current market instances like quinoa and avocados to illustrate concepts of demand and supply changes.