Economics Flashcards
Law of Supply
When the selling price does not provide revenues sufficient to cover all costs and provide a profit, the item is not supplied.
This leads us to the law of supply, which states that as the price of a product moves higher, more of that product will be supplied. The higher price will make it more attractive for producers to produce and deliver more of the product.
Cross-price elasticity is positive:
Goods are substitutes
As one good’s price goes up, the other good’s quantity demanded goes down
Cross-price elasticities is negative:
Good are compliments
As one good’s price goes up, the other good’s quantity demanded goes down
Positive substitution effect & Positive income effect
Normal goods
the substitution and the income effects reinforce one another to cause the demand curve to be negatively sloped
When price decreases, consumption increases, leading to increases levels of unspent income
A decrease in the price of a good that a consumer purchases, leaving consumer with unspent income:
Income Effect
Giggen Good
The positive substitution effect < negative income effect, causing a positively sloped demand curve, where a drop in prices decreases consumption
When the positive substitution effect < negative income effect , consumption:
Consumption will decrese
Giffen good
When prices decrease, consumption is not pushed towards the good
A normal profit is best described as:
Zero economic profit;
Normal profit is the level of accounting profit such that implicit opportunity costs are just covered; thus, it is equal to a level of accounting profit such that economic profit is zero
A company will stay in the market in the long term if:
A company will stay in the market in the short term if:
Total revenue (price) >= total costs
the company is exceeding it’s variable costs
Revenue > variable costs
Profit is maximized when:
marginal revenue = marginal cost
Total revenue - total cost = is maximized
Output increases in the same proportion as input increases occur at:
Constant returns to scale
Demand and Supply: The Demand Curve
QDX = f (Px, I, Py,…)
Quantity demanded is a function of:
Price of Px
Individuals income i
Price of related products (Py)
Many other factors may be added
Law of Demand: Typically, quantity increases as price decreases
Demand and Supply: The Supply Function
QSX = f (Px, Cx, …)
Quantity supplied is a function of:
Price of good Px
Cost of production Cx
Labor cost
Material cost
Production overheads
Technology
Many other factors may be added
Demand and Supply: Types of Market
Factor markets: Factors of production
Raw materials, labor, etc.
Firms are buyers
Product Markets: Services and Finished Goods
Firms are Sellers
Intermediate Markets: One firm’s finished products (components) used in the production of another firm’s output.
Demand and Supply: Shifts and Movements
Changes in price (Px) cause movements along the supply and demand curves.
Demand and Supply: Aggregating Demand and Supply Curves
Market supply = aggregate of the supply functions of the firms in the market
The same approach can be used to formulate market demand
Example: 50 firms in the market
Supply function: Qs = -250 +2.5Px
Market supply = Qs = -(50 x 250) + (50 x 2.5 Px)
Qs = -12,50 + 125Px
Invert function: Px = 0.008Qs + 100
0.008 = slope coefficient of supply curve
Inferior good
Positive substitution effect > negative income effect:
Occurs when a business charges the maximum possible price a consumer is willing to pay
First-degree price discrimination (perfect price discrimination)
Second degree: invovles using the quantity purchased as the basis for the pricing of a particular good
Economic profits is different from accounting because it includes:
Opportunity Cost
Economic Profit = accounting profit - opportunity costs
Oligopoly firms are said to be:
Interdependent
All firms will increase output when:
MR > MC
MR= Market price (perfect competition) & will stop production when Price = MR = MC
For all firms, profits are maximized where:
MR = MC
(Maximizes profits, not revenue)
Int’l Trade/Cap Flows: GNP & GDP
Gross Domestic Product (GDP): Value of goods and servies produced in a country
Gross National Product (GNP): Value of good and servies produced by a country’s citizens
Differences:
Income of citizens working abroad, non-citizens working in country
Income to capital owned by foreigners, foreign capital owned by citizens
GDP is better for measuring domestic activity
Int’l Trade/Cap Flows: Benefits/Costs of International Trade
Benefits:
Lower cost to consumers of imports
Higher employment, wages, and profits in export industries
Costs:
Displacement of workers and lost profit in industries competing with imported goods
Economists: Benefits outweigh costs
Aggregate Output: GDP
Market value of all final goods and services produced in a country/economy.
Produced during the period
Only goods that are valued in the market
Final goods and services only (not intermediate)
Rental value for owner occupied housing (estimated)
Government services (at cost)-not transfers
Int’l Trade/Cap Flows: Absolute vs. Comparative Advantage
Absolute advantage refers to lower cost in terms of resources used
Comparative advantage refers to lower opportunity cost to produce a product
Law of comparative advantage:
Trade makes all countries better off
Each country specializes in goods they produce most efficiently and trades for other goods
Outcome: Increased worldwide output and wealth with no country being worse off
Aggregate Output: Calculating GDP - Income Approach
Earnings of all households + businesses + government
Expenditures Approach
Sum the market values of all final goods and services produced in the economy
OR
Sum all the increases in value at each stage of the production process.
Absolute Advantage
A country’s ability to produce a good or service at a lower absolute cost than its trading partner.
Aggregate Demand
The total quantity of goods and services demanded within an economy.
Aggregate demand curve
Shows the relationship between the total quantity of goods and services demanded in an economy and the overall price level. It represents the total spending or demand for all goods and services in an economy at different price levels.
Aggregate income
The value of all the payments earned by the suppliers of factors used in the production of goods and services.
Aggregate outcome and aggregate income must be equal
Aggregate output
The value of all the goods and services produced in a period of time.
Aggregate outcome and aggregate income must be equal
Aggregate supply
The quantity of goods and services produced at any given level of price.
Aggregate supply curve
The level of domestic output produced at each price leve
Balance of payments
Summarizes a country’s economic transactions with the rest of the world over a period of time.
Double-entry bookkeeping
Balance of trade deficit
When an economy is spending more on foreign goods and services than foreign economies are spending on the domestic country’s goods and services.
It is like the domestic country is “spending more than it’s making”
Balanced Budget
Government budget where spending = revenue
Revenue primarily from taxation
Capital account
The capital account is one of the major components of a country’s balance of payments, alongside the current account and financial account. It tracks the flow of capital* between a country and the rest of the world.
*includes debt forgiveness, migrant transfers and assets, and the sale of non produced/non financial assets like natural resources or intangible assets.
Capital market expectations
Expectations regarding the risk and return prospects of asset classes.
Capital restrictions
Controls placed on movement of capital in or out of a coutry. May impact foreigners’ ability to own domestic assets and/or domestic residents’ ability to own foreign assets.
Closed economy
An economy that is self sufficient and does not trade with other countries.
aka autarkic economy
Comparative advantage
A country’s ability to produce a good or service at a lower relative cost (opportunity cost) than its trading partner.
as opposed to an absolute advantage
Complements
The downswing of a business cycle after the peak and before the trough
Recession or depression
Contractionary fiscal policy
Fiscal policy with the objective being a contraction of the real economy. Government spending may be reduced and taxes raised.
Cost-push
Inflation caused by rising costs (wages).
Core inflation
The inflation rate based on a price index of goods and services except food and energy.
Cross-price elasticity of demand
% Change in Quantity Demanded / % Change in the Price of a different good
theory of the consumer
deals with consumption (the demand for goods and services) by utility-maximizing individuals (i.e., individuals who make decisions that maximize the satisfaction received from present and future consumption).
theory of the firm
deals with the supply of goods and services by profit-maximizing firms. The theory of the consumer and the theory of the firm are important because they help us understand the foundations of demand and supply. Subsequent readings will focus on the theory of the consumer and the theory of the firm.
Os mercados podem dividir-se em :
Factor Markets are markets for the purchase and sale of factors of production. In capitalist private enterprise economies, households own the factors of production (the land, labor, physical capital, and materials used in production)
Good Markets are markets for the output of production. From an economics perspective, firms, which ultimately are owned by individuals either singly or in some corporate form, are organizations that buy the services of those factors. Firms then transform those services into intermediate or final goods and services.
when the quantity that buyers are willing and able to purchase at a given price is just equal to the quantity that sellers are willing to offer at that same price, we say the market has discovered ….
the equilibrium price
If, at a given quantity, the highest price that buyers are willing to pay is equal to the lowest price that sellers are willing to accept
the quantity is at equilibrium