Volume 1 - Economics Flashcards
Firms and Market Structures
determine and interpret breakeven and shutdown points of production, as well as how economies and diseconomies of scale affect costs under perfect and imperfect competition
describe characteristics of perfect competition, monopolistic competition, oligopoly, and pure monopoly
explain supply and demand relationships under monopolistic competition, including the optimal price and output for firms as well as pricing strategy
explain supply and demand relationships under oligopoly, including the optimal price and output for firms as well as pricing strategy
identify the type of market structure within which a firm operates and describe the use and limitations of concentration measure
Firms that operated in perfectly competitive markets are price takers, meaning that they have no pricing power and must accept the market price for any units they produce. A firm’s marginal revenue (MR) is equal to the market price (P) for each unit produced. As a result, the demand curve is horizontal and total revenue (TR) increases linearly as a function of the number of units sold.
Firms in imperfectly competitive industries have at least some pricing power, which creates a downward-sloping demand curve. Firms can choose to sell for a lower price, which will increase the number of units they sell. In this environment, the total revenue curve takes the shape of an arch because the benefits of selling at a lower price disappear beyond a certain point
By contrast, the price in an imperfectly competitive market (e.g., monopoly) is equal to a firm’s average revenue (AR) with the marginal revenue from each incremental unit produced plotting on a separate but also downward-sloping curve.
Profit-Maximization :
The short-term marginal cost (SMC), average variable cost (AVC). and average total cost (ATC) start out high and then fall before rising again as output increases. This is true whether a firm operates under perfect competition or some form of imperfect competition. The difference is that, under perfect competition, the demand curve is flat with the market price representing the firm’s marginal revenue at all levels of production. By contrast, the price in an imperfectly competitive market (e.g., monopoly) is equal to a firm’s average revenue (AR) with the marginal revenue from each incremental unit produced plotting on a separate but also downward-sloping curve.
a firm will maximize its profit by setting its production quantity ( Q* ) at the point where marginal revenue equals the short-term marginal cost (MR = SMC), assuming that SMC is rising.
Breakeven Analysis :
To earn an economic profit, a firm’s revenue must be greater than the sum of its explicit accounting costs and its implicit costs, such as the opportunity cost of capital (i.e., the rate of return required by investors).
Market price > ATC
Impossible to earn economic profits over the long-run under perfect competition because the lack of barriers to entry will allow new competitors to enter the market.
On the long-run, in perfect competition, firms earn just enough revenue to cover their economic costs (accounting + implicit costs, such as the opportunity cost of capital (i.e., the rate of return required by investors).
The short run is defined as a period during which at least one factor of production is fixed, such as plant size, physical capital, and/or technology.
Firms are continually operating in the short-run while simultaneously planning for the long-run.
Short- and Long-Run Cost Curves :
- The short-run average total cost (SATC) curve defines the per-unit cost in the short-run. Dependent on the choice of technology, physical capital, and plant size.
- The long-run average total cost (LRAC) curve is derived from the SATCs available to the firm (formed by fitting a curve tangent to the SATCs).
- A firm can gain economies of scale by growing provided the output increases faster than the inputs.
- Diseconomies of scale emerge if the increase in output is slower than the increase in input.
Q3 is where a firm must operate to minimize its per unit cost. This low point on the LRAC is called the minimum efficient scale (MES). In the short run, maximum profit (or minimal loss) is determined where marginal cost equals marginal revenue.
Long run in perfect competition: MES point maximize profit
Economies of scale can come from factors such as:
- Increasing returns to scale (increases in output are proportionately larger than increases in inputs)
- Specialization in functions
- Purchasing more expensive but more efficient equipment
- Reducing waste
- Better use of market information
- Obtaining discounted prices on inputs from bulk purchases
Diseconomies of scale can come from factors such as:
- Decreasing returns to scale (increases in output are proportionately smaller than increases in inputs)
- Cumbersome management
- Duplication of business functions
- Higher resource prices due to supply constraints
Companies experience diseconomies of scale if they grow too large to be managed efficiently.
Economic profit = Accounting Profit - total implicit opportunity costs (required rate of return)
Normal profit = Economic profit = 0
ROE = RRR
Abnormal profit : Economic profit > 0
ROE > RRR
Result of : technology, efficiency, cost advantage
Effect on equity of economic profit :
> 0 ; positive effect
= 0 ; no effect
< 0 ; negative effect
In perfect competition, firms are price takers, all face horizontal demand curves.
P = Marginal Revenu (MR) = Average Revenue (AR) = Demand curve (D)
In imperfect competition:
- Individual firms can influence price
- Smaller number of firms in the market (only one = monopoly)
- Firms face downward sloping demande curves
Total Revenue (TR) maximized at the peak MR = 0
If Average Variable Cost (AVC) are decreasing, Marginal Cost (MC) < AVC
If AVC are increasing, MC > AVC
MC intersects both AVC and ATC at their minimum
Short Run Cost : At least one of the factors of production are fixed
Long run Cost : All factors are variable
Until Long Run Average Cost touches the minimum Short Run Average Cost
curve ; Economies of scale
Diseconomies of scale :
- Poor management control / oversight
- Overlap/Duplication
- Greater stress on local supply
- Big targets — Unions, antitrust legislation, litigation
Economic Profit (MC > SRATC) : Encourages market entry since ROE > RRR –> Downward pressure on Price
Economic Loss (MC < SRATC) : Encourages market exit since ROE < RRR –> Upward pressure on Price
The minimum point of LRATC ; Settle a price –> Economic profit = 0
Oligoply market demand characteristics on pricing (With the assumption of no collusion/cartel between the firms )
1 - Pricing Interdependence : If you up prices, competition will not act and the demande will become elastic. Lowering price –> Price war and nobody wins
2- Cournot Assumption: Firms set output simultaneously and let the market determine price. Assumption ; each firm chooses its profit maximizing output assuming the output of the other firms will not change. Making the peace with competition by finding the best price.
(Ex: In order words, looking last year of other firms and only thinking in our output.)
3- Nash Equilibrium: No firm can obtain a higher payoff, holding all other firms strategies constant, by choosing a different strategy.
In Oligoply ; The followers firms, follow the price and their quantity of demande is set by that price.
Concentration Ratio: Market Share of N largest firms
0% - Perfect competition
100% - Oligopoly/Monopoly
Quantifies size, but not market power
May be unaffected by M&A among top N firms
Herfindahl - Hirschman Index (HHI):
Market Share of N largest firms **2
1–> Monopoly
1/M –> M firms with equal market share
Does not take possibility of entry into account
Does not consider elasticity of demand
The Ricardian and Heckesher-Ohlin models focus on countries developing specialization based on absolute and comparative advantages.
4 Phases of the Business Cycle:
1- Recovery
2- Expansion
3- Slowdown
4- Contraction
Fiscal Policy (Gouvernement –. Economy) : Taxation and Spending
Monetary Policy (Central Banks –> Banking) :
- Activities related to the levels of money supply and credit (interest rates)
- Typically act idenpendtly of gouvt.
The Fiscal and Monetary policies are used to regulate/influence economic activity over time - to accelerate or slown down the economy
Goal:
- Create an economic environment where growth is stable and positive and inflation is low and stable (Prices stability, Full employement).
- Attempt to avoid boom/bust scenarios in the economy
Keynesians: Fiscal policy can have a significant effect on Aggregate Demand (AD), Y (GDP), and Employement WHEN there is an output gap
In recession: Increase spending to raise employement and Y
Rev < Exp –> Budget deficit –> issue debt
In expansions: Lower spending, raise taxes
Rev > Exp –> Budget surplus–> pay down debt
Monetarist: Fiscal changes have only a temporary effect on AD.
No long lasting effect
Surplus = Contractionary
Deficit = Expansionary
The gouvernment policy tools for outflows; Transfer payment (B): Welfare, pensions, housing benefit, tax credits, child benefits, unemployement, etc –> are not considered spending by G so they are included in the GDP by C.
Desirable attributes of a tax policy:
1- Simplicity
2- Efficiency :
Taxes should interfere as little as possible in choices
Should discoruage work and investment as little as possible
Often Broken (alchool, tabacco)
3- Fairness :
Horizontal equity -> ppoeple in similar situations should pay the same tax
Vertical equity-those who earn more should pay more
4- Revenue sufficiency : May conflict with other attributes
Issues:
May reduce incentives to work/save, including people who would leave the country (Capital flight)
Fairness is subjective -> Depends on your position
Tax reform vs Spending reform : If the gouv. always run for taxes for revenue, maybe they have a spending problem and not revenue problem.
GDP (y) = C + I + G + (X-N)
G ( Gouv Spending) - T (revenue) + B (transfer payement) = Budget deficit
YD (Disposable income) = Y - NT (taxes less transfer PMT -> net taxes) = ( I- t (tax rate)) Y
Fiscal multiplier : How much output changes for a change in taxation or spending.
1 / 1- Marginal propensity to consume (MPC)(1-t)
1 / 1- MPC : Without tax
Automatic Stabilizers:
-Affect deficit/surplus unrelated to fiscal policy
-What may then appear to be expansionary/contractionary policy may only be the result of non-discretuonary reactions
Therefore: The level of surplus/deficit may not be a good indicator of fiscal policy stance
rpoblem originates –> Reconition lag –> Problem Detected –> Action lag –> Action implemented –> Impact lag –> Effect on the economy
Action will often:
Target employement or/and inflation
Central Bank:
Bnaker to the Gouv
Banker’s bank –> lender of last resort to the banks in its jurisdiction
Regulator/Supervisor of the payment system
Banking system supervisor
Manage the country’s foreign currency reserves and gold reserves
Conduct Monetary policy
Objectives;
Maintain the stability of the financial system
Promote full employement
Promote price stability (most common mandate)
Tools:
1- Open market Operations: Purchase/Sale of gouv bonds from/to commercial banks and designated market makers (secured loans -> REPO and Reverse REPO)
2- Policy Rate: Federal funds rate –> US
Upper Bound - Rate willing to lend at (banks)
Lower Bound - Rate willing to borrow at
Hike in policy rate meant to increase lending rates and constrict credit growth
3- Reserve Requirements; How much each banks deposits have to be held at the central bank
A market is a group of buyers and sellers that agree on a price to exchange goods and services.
Analysis of Market Structures :
1- Perfect Competition :
Markets with perfect competition have homogeneous (i.e., identical) products with no producer large enough to influence the price. Profits are driven to the minimum required to raise capital.
2- Monopolistic Competition:
This type of market also has a large number of firms, but the products are differentiated. Soft drinks and cosmetics fall into this category.
3- Oligopoly:
The oligopoly market structure has only a few firms supplying the market. Retaliatory strategies must be considered when changing prices or production levels. The airline industry is an oligopoly.
4- Monopoly:
Least competitive market structure. There is a single seller and no substitutes for the product. The seller has much control over the prices, but often regulated by governments. Local utility companies often fall into this category.
5 forces of Porter :
1- Threat of substitutes
2- Threat of entry
3- Intensity of competition among incumbents
4- Bargaining power of customers
5- Bargaining power of suppliers
Firms that operate under monopolistic competition typically direct considerable resources to advertising and branding in order to maintain or increase their pricing power.
Demand, Supply, and Optimal Output for monopolistic competition :
Firms operating under monopolistic competition face a downward-sloping demand curve, meaning that they can increase the demand for their product by charging a lower price. Demand for products in monopolistically competitive markets is more elastic at higher price levels. In the short-run, firms maximize their profits by producing at the point where marginal revenue equals marginal cost.
Long-Run Equilibrium for monopolistic competition :
Because barriers to entry are relatively low, economic profits will fall to zero in a monopolistically competitive market over the long-run as economic profits attract new competitors. This will put downward pressure on prices and, in the long-run, total cost (including opportunity cost) will match total revenue (C = P)
In the long-run, production in a monopolistically competitive market will be set at the point where marginal revenue intersects with long-run marginal cost.
In a perfectly competitive market, the long-run equilibrium is reached at the point where MR intersects with both LRMC and long-run average cost.
Level of production in a monopolistically competitive market is lower than it would be under perfect competition
Demand Analysis and Pricing Strategies for Oligopoly :
With price collusion, the aggregate demand curve is divided up among the individual participants. Individual demand curves are present for non-colluding markets, which are dependent upon the pricing strategies adopted by the firms.
There are three pricing strategies.
1- Pricing Interdependence : This situation exists in any market with price wars. A common example is airlines that serve the same cities. It is common to assume competitors will match price reductions and ignore price increases. This means market share will increase when competitors increase their prices. This implies the elasticity is greater for price increases than decreases. Two demand functions are applicable – one for a price increase and one for a price decrease. The two demand curves will intersect at the current price. This kink in the demand curve also causes a discontinuous marginal revenue structure. Multiple cost structures are consistent with the current price.
2- Cournot Assumption : Under the Cournot assumption, each firm determines its profit-maximizing production level assuming all the other firms will not change their output. In the long run, the equilibrium output and price are stable.
3- Game Theory/Nash Equilibrium : Under a Nash equilibrium, the pricing strategy is set when no firm has an incentive to change. Each firm does the best it can given the reaction of its rivals. This approach assumes each firm is acting in their own best interest without price collusion. The resulting market equilibrium may not maximize the total profits for all firms.
Open collusive agreements are called cartels and more likely to be successful under the following conditions:
- There are just a few firms or one of the firms is dominant.
- Firms should not all have similar market shares. Otherwise, the competitive forces would overshadow the benefits of collusion.
- Products are homogeneous.
- Firms have similar cost structures.
- Order sizes are small and deliveries are frequent.
- There is a threat of severe retaliation from competitors for breaking a collusive agreement.
- Collusion among incumbent firms is likely to be a barrier to new entrants.
A cartel is less likely to successfully execute a collusion strategy if, as in this example, the firms have similar market shares. In such circumstances, the incentive to compete is greater than would be the case if one firm’s market share was significantly larger than the market shares of other firms in the industry.
The Stackelberg model is another potential strategy based on game theory. This theory assumes moves are made sequentially, whereas Cournot assumes they are made simultaneously. Under the Stackelberg model, the leader firm has a distinct advantage.
Optimal Price, Output, and Long-Run Equilibrium for Oligopoly :
Dependent on the demand conditions and the competitor’s strategies. Profit is still maximized when marginal revenue equals marginal cost.
The dominant (or leader) firm generally is the price maker. Typically, the dominant firm has a lower cost structure, which makes it unlikely other firms will start a price war. The total market demand curve will have a steeper slope than for the leader because the leading firm will capture a larger percentage of the total market at lower prices.
There is no single optimum price and output analysis for all oligopoly markets. It is most clear when one firm is dominant.
Factors Affecting Long-Run Equilibrium :
Over time, the market share of the dominant firm typically declines as other firms become more efficient. Pricing wars should be avoided because they only lead to temporary market share gains.
Innovation is key for dominant position
Market structures are generally inefficient for consumers if firms have an incentive to reduce output in order to increase prices.
Elasticity could be used to measure market concentration. Highly elastic demand implies good competition, while inelastic demand could indicate too much market concentration.
Simpler Measures :
The concentration ratio is the sum of the market shares of the N largest firms. The result will be a number between 0 and 1. However, a high concentration ratio does not necessarily imply market power. Just the threat of new entrants could force a firm to act in a competitive manner. Also, the ratio is not affected by the mergers of the top players in the market.
The Herfindahl-Hirschman index (HHI) attempts to fix some of the issues with the concentration ratio. The HHI is the sum of the squared market shares of the N largest firms. The HHI still does not take into account the possibility of new entrants. So only take the TOP firms !!!
Understanding Business Cycles
describe the business cycle and its phases
describe credit cycles
describe how resource use, consumer and business activity, housing sector activity, and external trade sector activity vary over the business cycle and describe their measurement using economic indicators
The classical cycle refers to fluctuations in the level of economic activity, which can be measured by GDP in volume terms. Usually, the contraction phases are short and the expansion phases are long.
Rarely used because it does not allow the breakdown of movements between short-term fluctuations and long-run trends.
The growth cycle refers to fluctuations in economic activity around the long-term potential or trend growth level. The peak of the growth cycle corresponds to the largest positive gap between actual GDP and the trend GDP. Compared to the classical cycle, the peaks of the growth cycle generally happen earlier and troughs later in time. The growth cycle is most commonly used by economists because it captures both the changes driven by long-run trends and changes due to short-term fluctuations.
The growth rate cycle refers to fluctuations in the growth rate of economic activity. The peaks and troughs of a growth rate cycle typically occur earlier than those of a classical cycle and a growth cycle.
Market Conditions and Investor Behavior :
1- Recovery Phase
When an expansion is expected, risky assets will be repriced upward as the markets start incorporating higher profit expectations into the prices. Equity values typically bottom out three to six months before the overall economy reaches its trough.
2- Expansion Phase
The later part of an economic expansion is called the boom phase, during which the economy is operating at above full capacity and prices of risky asset are rising. Companies compete for qualified workers by raising wages and continue to expand capacity through strong cash flows and borrowing. Central banks may raise interest rates to reduce the inflationary pressure caused by an overheating economy.
3- Slowdown Phase
As the economy begins to slow after the boom phase, prices of risky assets come down from their peak levels. Investors focus on relatively safe assets, such as government bonds and high-quality corporate bonds. Concern over higher inflation drives higher nominal yields.
4- Contraction phase
Investors turn to safer assets and shares of companies with steady positive cash flows, such as producers of staple goods. The marginal utility of a safe income stream increases when employment is falling.
When the spread between 10-year US Treasury yields and the federal funds rate narrows and at the same time the prime rate stays unchanged, this mix of indicators most likely forecasts future economic:
A
growth.
B
decline.
C
stability.
A weakening economy and activity measures that are below potential signal the beginning of the contraction phase of the business cycle. After achieving its fastest rate of growth during the slowdown phase, inflation eventually begins to decelerate during the contraction phase, but with a lag
The prime rate is the interest rate that commercial banks charge their most creditworthy customers, typically large corporations. It is often used as a reference or base rate for many types of loans, including personal loans, home equity lines of credit, and credit cards.
During an economic expansion, lenders are more willing to extend credit, usually on favorable terms. When the economy is weak or weakening, lenders “tighten” credit by making it less available and more expensive. This often leads to decline in real estate values and higher default rates, which further weakens the economy.
Applications of Credit Cycles :
It is now widely accepted that the credit cycle is closely linked to the business cycle, although they are not always synchronized with each other.
Key observations include:
- Loose private sector often leads to bubbles in asset prices and real estate valuation that eventually burst due to capital withdrawals prompted by weaking economic conditions.
- A recession is likely to be deeper and last longer if it accompanied by collapses in real estate and equity valuations.
- Conversely, economic recoveries tend to be stronger when they are combined with rapid growth in credit to support a rising real estate market.
- Compared to business cycles, credit cycles are usually longer, deeper, and sharper.
- A typical credit cycle reaches its peak just before the overall economy moves into a recessionary phase.
Consequences for Policy :
- Understanding developments in the housing and construction markets
- Assessing the extent of business cycle expansions and contractions
- Anticipating policy changes
Unlike monetary and fiscal policies, which are designed to minimize the volatility of business cycles, macro-prudential stabilization policies aim to dampen financial booms.
The Workforce and Company Costs :
Companies are reluctant to fire employees during temporary economic downturns because they may need them back soon and there is some implicit loyalty. If the downturn continues, companies will try to cut all non-essential costs (consultants and advertising). Companies will try to liquidate inventories. Banks will reduce lending as bankruptcy risks are perceived to be higher.
The decreases in prices and interest rates will make goods cheaper and borrowing less expensive, so businesses and individuals will begin to spend more. This is the turning point of the business cycle, where aggregate demand starts to increase and economic activity increases.
Business and credit cycles are closely linked, but not perfectly synchronized. Compared to a business cycle, a typical credit cycle lasts longer, peaks sooner, and follows a steeper path as it moves between its peak and its trough.
Fluctuations in Capital Spending :
1- Recovery:
- Low but increasing, with a focus on efficiency rather than capacity
- Light producer equipment and equipment with a high rate of obsolescence are reinstated first
2- Expansion:
- Focused on capacity expansion
- New types of equipment needed to meet demand
- Purchase of heavy and complex equipment
- Companies expand warehouse space to new locations
3- Slowdown:
- New orders continue to be placed as companies operate at or near capacity
4- Contraction:
- Existing orders are canceled and companies stop placing new orders
- Technology and light equipment with short lead times get cut first, then cutbacks in heavy equipment and construction follow
- Scale back on maintenance
Types of Indicator :
1- Leading indicators are useful for predicting the future state of the economy.
2- Coincident indicators help identify the current economic state.
3- Lagging indicators help identify past economic conditions.
Fluctuations in Inventory Levels :
Inventories can be used as a gauge for the position of the economy in a business cycle because they go up and down quickly and frequently. The inventory-sales ratio is a key indicator. Sales slow faster than production when the economy is in the slowdown phase, causing a spike in inventory-sales ratio.
Economic indicators provide information on the state of the overall economy. Help understand the position of an economy in a cycle predict the future performance of the market.
Composite indicators include several different variables that tend to move together. For example, a composite indicator may measure the financial stability of a company using variables such as its total asset value, debt ratio, and other important metrics.
An analyst may use lagging and coincident indicators to determine the current cycle phase, then seek confirmation using leading indicators. If all indicators produce the same result, the analyst can design an investment strategy based on this conclusion.
Other Composite Leading Indicators :
The Organisation for Economic Co-operation and Development (OECD) publishes the OECD Composite Leading Indicator (CLI) to allow comparison of the business cycle across different countries.
- Economic sentiment index
- Residential building permits
- Capital goods orders
- Euro Stoxx Equity Index
- M2 money supply
- An interest rate spread
- EurozoneEuro area Manufacturing Purchasing Managers Index (PMI)
- EurozoneEuro area Service Sector Future Business Activity Expectations Index
Don’t forget surveys
Nowcasting is the process of estimating the current state (think “now” + “forecasting”), and the produced estimate is known as a nowcast. This is important because certain data are subject to publications delays.
While different nowcasts are produced by different institutions, the Atlanta Fed publishes a running estimate of real GDP growth for the current quarter known as GDPNow. GDPNow is useful because the current GDP data is usually not available until the end of the quarter.
Commonly used to estimate the current GDP growth, inflation rate, and unemployment rate.
In the US, the diffusion index consists of different leading, coincident, and lagging indicators. This index shows the components that are moving consistently with the overall index.
A higher diffusion index value signifies a broader movement in the economy.