Chapter 11 & 12 Flashcards
Explicit Costs
costs that require an outlay of money; paying for items/ services for firms; ie. rent, electricity, salary paid to workers
Implicit Costs
costs that do not require an outlay of money; opportunity costs; ie. labor and capital
Normal Rate of Return
rate of return just enough to keep owners and investors satisfied; two opportunity costs are equal and your economic profit is $0
Short Run
a period of time where at least one factor of production (LLK) is fized and there is no entry or exit to or from the industry
Long Run
a period of time where all factors of production (LLK) are variable and there is free entry or exit to and from the industry
Bases of a firm’s decisions
- market (output) price
- production techniques available
- input prices
Optimal Method of Production
some production techniques are more labor intensive and others are more capital intensive
Production Function
relationship between quantity of input used and quantity of output produced; in the short run constrained by the fixed factor of production; limited by resources and space
Marginal Product of Labor (MPL)
the additional product that an additional unit of labor will produce; MPL= change in TP/ change in L
Law of Diminishing Returns
Short run phenomenon; in the short run after a certain point (which varies) when additional inputs are added, the marginal product of that input declines; at some point a firm is constrained by a fixed factor of production in the s.r.
Average Product of Labor (APL)
average product produced by each variable unit of input; APL= TP/L
Fixed Costs (FC)
sum of all costs that do not vary with output even if output is 0; ie. rent, electricity, water
Variable Costs (VC)
the sum of all costs that do vary with output in the short run; to produce more output a firm requires more inputs
Total Cost
FC+VC
Average Fixed Cost (AFC)
AFC=FC/Q; steadily declining curve that approaches but never touches the quantity axis
Average Variable Cost (AVC)
AVC=VC/Q; U-shaped; decreases; reaches minimum then increases
Average Total Cost (ATC)
ATC=TC/Q or ATC=AFC+AVC; U-shaped gets closer and closer to AVC as Q increases
Marginal Cost
change in the total cost from producing an additional unit; MC=change in TC/change in Q; upside down version of MPL; after minimum diminishing returns set in
Long Run Average Cost Curve
graph that shows different scales on which a firm may choose to operate in the long run; shape differs; not every LRAC will increase
Economies of Scale
occurs when you increase the firm’s scale of production and the average cost per unit decreases
Constant Returns to Scale (CRS)
increase the scale of production and this leads to constant average costs
Diseconomies of Scale
increase scale of production which leads to an increase in average cost; the reason the firms experience diseconomies of scale in the long run is because they experience waste and mismanagement -> too top heavy; not because of diminishing returns; diminishing returns only occur in the short run because they are constrained by fixed factors of production
Long Run Equilibrium
at the point where P=MC=SRAC=LRAC (in perfect competition)
Market Power
the ability to raise prices without losing all of its quantity demanded for that product
Perfect Competition
an industry structure in which:
- there are many firms
- each firm is small, relative to the overall market
- products are homogeneous (identical)
- have no market power so they are price takers
- free entry and exit to and from the industry; there are no barriers to entry
Marginal Revenue
gives us the change in total revenue from producing an additional unit of output; MR= change in TR/change in Q; in perfect competition D=MR
Profit Maximizing Rule
as long as MR exceeds MC you want you keep on producing until you hit the profit-maximizing point of output= P=MR=MC
Perfect Competition Short Run Scenarios
- Positive economic profits
- Break Even
- Earning economic losses (can stay open or shut down)
Shutdown Rule
- if TR>VC stay open
- if TRAVC stay open
- if P
Long Run Scenarios
- making money in the short run you expand in the long run and firms enter
- breaking even stay as is
- if losing money in short run firms exit and contract
If new firms enter
supply shifts to right and prices go down; supply shifts tot he right so much until firms break even or Price equals the point where ATC crosses MC
In Perfect Competition in the Long Run
all firms break even; P=MC=MR=ATC