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Microeconomics
Test 3
27
Economics
Undergraduate 3
11/12/2008

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Term
Isoquant
Definition
Curve showing all possible combinations of inputs that yield the same output.
Term
Isoquant Map
Definition
Graph combining a number of isoquants, used to describe a production function.
Term
Marginal Rate of Technical Substitution (MRTS)
Definition
Amount by which the quantity of one input can be reduced when one extra unit of another input is used, so that output remains constant.
Term
Production Function - Special Case - Perfect Substitutes
Definition
When the isoquants are straight lines, the MRTS is constant. Thus the rate at which capital and labor can be substituted for each other is the same no matter what level of inputs is being used.
Term
Production Function - Special Case - Fixed-Proportions
Definition
When the isoquants are L-shaped, only one combination of labor and capital can be used to produce a given output.
Term
Returns to Scale
Definition
Rate at which output increases as inputs are increased proportionately.
Term
Increasing returns to scale
Definition
Situation in which output more than doubles when all inputs are doubled.
Term
Constant returns to scale
Definition
Situation in which output doubles when all inputs are doubled.
Term
Decreasing returns to scale
Definition
Situation in which output less than doubles when all inputs are doubled.
Term
Accounting Cost
Definition
Actual expenses plus depreciation charges for capital equipment.
Term
Economic Cost
Definition
Cost to a firm of utilizing economic resources in production, including opportunity cost. (Both Explicit and Implicit)
Term
Sunk Cost
Definition
Expenditure that has been made and cannot be recovered. Because it cannot be recovered it should not influence the firms decisions. No alternative use = No opportunity cost. (Ex. R & D)
Term
Total Cost (TC)
Definition
Total economic cost of production, consisting of fixed and variable costs. (TFC + TVC)
Term
Fixed Cost (FC)
Definition
Cost that does not vary with the level of output and that can be eliminated only be shutting down.
Term
Variable Cost (VC)
Definition
Cost that varies as output varies.
Term
Amortization
Definition
Policy of treating a one-time expenditure as an annual cost spread out over some number of years.
Term
Marginal Cost (MC)
Definition
Increase in cost resulting from the production of one extra unit of output.
Term
Average Total Cost (ATC)
Definition
Firm's total cost divided by its lever of output. (TC / Q)
Term
Average Fixed Cost (AFC)
Definition
Fixed cost divided by the level of output. (TFC / Q)
Term
Average Variable Cost (AVC)
Definition
Variable cost divided by the level of output. (TVC / Q)
Term
Isocost Line
Definition
Line showing all possible combinations of labor and capital that can be purchased for a given total cost.
Term
Expansion Path
Definition
Curve passing through points of tangency between a firm's isocost lines and its isoquants.
Term
Production with two variables
Definition
Producing the same output using labor and capital as variables.
Term
Implicit Cost
Definition
Does not require actual money payment, usually cause the resources are owned by the firms themselves.
Term
Explicit Costs
Definition
Requires actual money payment, usually cause resrouces are owned by outsiders.
Term
Accounting Profit
Definition
TR - (explicit + depreciation) = Profit
Term
Economic Profit
Definition
TR - (explicit + implicit + depreciation) = Profit
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