ECON121 Final Word Scramble
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| Question | Answer |
| Market Structure | Classification system for key traits of market including # of buyers, sellers, product bought and sold and ease of entry or exit into/from market |
| Public Good | They are non-excludable and non-rival in consumption. An example is a street sign |
| Private Good | Rivalry and excludability. Typically traded in markets |
| Market Failure | Situation where unrestricted operation of free market yields a result that is not socially optimal |
| Information Asymmetry | Occurs when info about good varies in relevant ways between buyers and sellers |
| Moral Hazard | market inefficiency resulting from information asymmetry. Terms of transaction lead to different behavior |
| Public Good | They are non-excludable and non-rival in consumption. An example is a street sign |
| Private Good | Rivalry and excludability. Typically traded in markets |
| Market Failure | Situation where unrestricted operation of free market yields a result that is not socially optimal |
| Information Asymmetry | Occurs when info about good varies in relevant ways between buyers and sellers |
| Moral Hazard | market inefficiency resulting from information asymmetry. Terms of transaction lead to different behavior |
| Adverse Selection | Market inefficiency resulting frmo information asymmetry. When one party has been deceived about qualities. |
| Negative Externality | cost imposed on "third parties" not reflected in market system |
| Pigovian tax | Special tax levied on company that pollute enviornment or create excess social costs. In true market, best way to correct negative externality. |
| Monopoly | Firm that is only producer of good or service which there are no good substitutes |
| Oligopoly | market structure where small number of large firms dominate industry |
| Monopolistic Competition | market structure where large number of small firms produce similar, not identical, product |
| Barriers to entry | market conditions that prevent entry of new firms into industry |
| Price discrimination | charging different customers different prices not related to difference in cost |
| First degree price discrimination | when seller charges different price for each unit of output and price is always max price consumer will pay |
| Third degree price discrimination | when seller is able to partition market demand into 2 or more groups and charges different prices to different groups |
| Producer surplus | gap between price of good and opportunity cost of producing it. Area below eq. line and supply line. |
| Consumer surplus | Difference between what consumer would willingly pay and what they actually play. |
| Shutdown point | price equals minimum average variable cost. P<AVC, firm shuts down |
| Elasticity of Supply | measures responsiveness of sellers to change in market price. ΔQs/ΔP * P/Qs |
| Break-even point | TR=TC, Profit=0. P=AC if break even |
| Production function | expression of the relationship between inputs and outputs holding tech. constant. l(land), L(labor), K(capital), E(entrepreneurship). |
| Short-run equilibrium | economic profit may be 0 or negative (bad times). Economic profit may be positive (good times). |
| Diminishing marginal product | as a firm uses more of a variable resources with a fixed resource and fixed technology, MP of variable resource will fall. Holds in short-run due to fixed input. |
| fixed cost | payments to fixed inputs. Does not depend on quantity produced. |
| variable cost | payments to variable inputs. varies with level of output |
| perfectly competitive market | Many firms sells to many buyers. Identical products. Products are rival and excludable. NO restrictions on entry/exit. Sellers and buyers well informed about prices. |
| short run | period where one input is fixed |
| long run | period in which no input is fixed |
| Three stages of production | Stage 1: From 0 units to MP=AP. Stage 2: MP=AP to where MP=0. Stage 3: When MP is negative. |
| economies of scale | When firm increases plant size and labor by same percentages, output increases by larger percentage and LAC(long-run average cost) decreases. |
| diseconomies of scale | when firm increases plant size and labor by same percentages, output increases by smaller percentage and LAC increases |
| Increasing returns to sale | Firm increases all inputs proportionally, output increases more than proportionately. |
| decreasing returns to sale | firm increases all inputs proportionally, output increases less than proportionately. |
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