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Key Terms
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economic profit  (pure profit) The total revenue of a firm less its economic costs (which includes both explicit costs and implicit costs); also called above normal profit.
(See page(s) p. 323)
economic rent  The price paid for the use of land and other natural resources, the supply of which is fixed (perfectly inelastic).
(See page(s) p. 315)
explicit costs  The monetary payments a firm must make to an outsider to obtain a resource.
(See page(s) p. 323)
implicit costs  The monetary income a firm sacrifices when it uses a resource it owns rather than supplying the resource in the market; equal to what the resource could have earned in the best-paying alternative employment (including a normal profit).
(See page(s) p. 323)
incentive function of price  The inducement that an increase in the price of a commodity gives to sellers to make more of it available (and conversely for a decrease in price), and the inducement that an increase in price offers to buyers to purchase smaller quantities (and conversely for a decrease in price).
(See page(s) p. 316)
insurable risks  An event that would result in a loss and whose occurrence is uncontrollable and unpredictable; insurance companies are not willing to sell insurance against such a loss.
(See page(s) p. 324)
loanable funds theory of interest  The concept that the supply of and demand for loanable funds determines the equilibrium rate of interest.
(See page(s) p. 318)
nominal interest rate  The interest rate expressed in terms of annual amounts currently charged for interest and not adjusted for inflation.
(See page(s) p. 322)
normal profit  The payment made by a firm to obtain and retain entrepreneurial ability.
(See page(s) p. 324)
pure rate of interest  An essentially risk-free, long-term interest rate not influenced by market imperfections.
(See page(s) p. 321)
real interest rate  The interest rate expressed in dollars of constant value (adjusted for inflation); equal to the nominal interest rate less the expected rate of inflation.
(See page(s) p. 322)
static economy  An economy in which factor supplies, technological knowledge, and consumer tastes are constant and unchanging.
(See page(s) p. 324)
uninsurable risks  An event that would result in a loss but whose frequency of occurrence can be estimated with considerable accuracy; insurance companies are willing to sell insurance against such losses.
(See page(s) p. 324)







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