Perfectly Competitive Market

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Chapter 2 and 3 of ECON1101
Natalia Djohari
Flashcards by Natalia Djohari, updated more than 1 year ago
Natalia Djohari
Created by Natalia Djohari almost 9 years ago
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Question Answer
Market set of all consumers and suppliers who wants to buy or sell a good/service
Market Equilibrium When the price and quantity of a good is stable
Perfectly Competitive Markets 1. Consumer and Supplier are Price-Takers 2. Homogeneous Good 3. No externality 4. Goods are excludable 5. Full Information 6. Free Entry and Exit
Marginal Benefit Extra benefit of producing a unit of good
Marginal Benefit Extra cost of producing a unit of good
Cost-Benefit Principle Action is taken when MB >= MC
Economic Surplus difference between MB and MC of taking an action
Quantity Supplied Quantity of good or service that maximizes profit of supplier
Supply Curve relation between the price of a good or service and the quantity supplied of the good or service
Law of Supply producer offer more of a good or service when the price increases.
Horizontal Interpretation (of the Supply Curve) Start from a certain price and find the associated quantity. That is the quantity the supplier will supply for that price
Vertical Interpretation (of the Supply Curve) Start form a certain quantity and find the associated price. That is the minimum price the produce will accept
Producer Reservation Price minimum amount of money the producer is willing to accept to offer a certain good or service
Sunk Cost A cost that once paid cannot be recovered
Fixed Cost cost associated with a fixed factor of production
Short Run a period of time during which at least of one factor of production is fixed
Variable Cost a cost associated with a variable factor of production
Long Run Long Run denotes a period of time during which all factors of production are variable
Profit difference between the total revenues (TR) and the total costs (TC)
Shut Down Condition (short run) π (profit) production < −FC
Exit Condition (long run) π (profit) production < 0
Factors that shifts the supply curve Technology Input Prices Expectations Changes in pricing for other products Number of suppliers
Price Elasticity of Supply the percentage change in the quantity supplied re- sulting from a very small percentage change in price
Elasticity Formula for Two points ElasticityA = (∆Q/Qa) / (∆P/Pa)
Elastic Supply price elasticity of supply is greater than 1
Unit Elastic Supply price elasticity of supply is equal to 1
Inelastic Supply price elasticity of supply is less than 1
Elasticity Formula for one point ElasticityA = (Pa/Qa) × (1/slope)
Factors to increase supply price elasticity 1. large availability of raw materials 2. more mobile the factors of production 3. larger the amount of inventories and excess capacity 4. Longer time horizon
Utility satisfaction that an individual derives from consuming a given good or taking a certain action (measured in utils)
Decreasing Marginal Utility consuming an extra unit of a given good decreases the amount of utils
Quantity Demanded quantity of a given good or service that maximizes the utility experienced by the individual consuming it
Substitution Effect change in the quantity demanded of a given good following a change in its relative price
Income Effect changes in the quantity de- manded of a given good following the reduction in the consumer’s purchasing power
Law of Demand demand curves tend to be downward sloping
Giffen Goods an increase in price increases the quantity demanded
Demand Curve the relationship between the price of a good or service and the quantity demanded of that good or service
Horizontal Interpretation (of the Demand Curve) Start fromm a certain price and find associated quantity. This is how many units the consumer is willing to buy at that price.
Vertical Interpretation (of the Demand Curve) Start form a certain quantity and find the associated price. This price is the maximum amount of money the consumer is willing to pay for the marginal unit.
Substitutes Two goods are Substitutes when an increase in the price of one causes an increase in the quantity demanded of the other
Complements Two goods are Complements when a decrease in the price of one causes an increase in the quantity demanded of the other
Factors that shift the demand curve right (Hint: 8 points) 1. Successful marketing campaign 2. Decrease in the price of complements 3. An increase in the price of substitutes 4. An increase in income for a normal good 5. A decrease in income for an inferior good 6. A positive shift in consumers’ preferences towards a certain good 7. Expectations of an increase in future prices that push the buyers to try to purchase the goods early 8. Population growth
Price Elasticity of Demand the percentage change in quantity demanded resulting from a very small percentage change in price
Elastic Demand the price elasticity of demand is greater than 1
Unit Elastic Demand the price elasticity of demand is equal to 1
Inelastic Demand the price elasticity of demand is less than 1
Factors to make demand curve more elastic 1. large number of substitutes 2. a narrow definition 3. large share of income required to purchase a good (or service) 4. long time horizon
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