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.