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elastic demand
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A situation in which consumer demand is sensitive to changes in price
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inelastic demand
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A situation in which an increase or a decrease in price will not significantly affect demand for the product
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unit elastic demand
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demand is unit elastic when the percentage change in quantity demanded is equal to the percentage change in price, so the price elasticity is equal to 1 in absolute value
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elasticity of demand formula
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elastic, horizontal leaning graph (luxury)
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Ed > 1
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inelastic, vertical leaning graph (necessity)
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Ed < 1
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unit elastic, curve graph
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Ed = 1
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perfectly inelastic, vertical graph
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Ed = 0
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perfectly elastic, horizontal graph
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Ed = infinity
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Price x Quantity
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total revenue
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Inelastic - price increases then total revenue increase vice versa. Elastic - price increase then total revenue decreases vice versa.
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total revenue test
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substitutability, proportion of income, luxuries vs necessities, time, durability
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determinants of price elasticity of demand
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quantity supplied by producers is relatively responsive to price changes
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elastic supply
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quantity supplied by producers when it is relatively insensitive to price changes
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inelastic supply
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inelastic good
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what type of good would the government want to tax
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perfectly inelastic
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elasticity of supply in the short run
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elastic
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elasticity of supply in the long run
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substitute good
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cross elasticity of demand
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complementary good
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cross elasticity of demand +/+ = +
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normal good
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cross elasticity of demand -/+ = -
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inferior good
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income elasticity of demand
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MUx/Price x = MUy/Price y
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income elasticity of demand +/+ = +
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land, labor, capital, and entrepreneurship cost
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income elasticity of demand -/+ = -
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opportunity cost
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utility is maximized when
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explicit cost + implicit cost
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explicit cost
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explicit cost ONLY
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implicit cost
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total revenue - explicit cost
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economic cost
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rent
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accounting cost
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total revenue - explicit cost - implicit cost
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accounting profit
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zero economic profit
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fixed cost
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the cost of producing one more unit of a good
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economic profit
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total cost/quantity (TC/Q)
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normal profit
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total cost - fixed cost
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marginal cost
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variable cost/quantity (VC/Q)
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average total cost (ATC)
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starts when average total cost starts to become more expensive
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variable cost
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stays the same
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average variable cost
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increases
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diminishing returns
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increases
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as output increases, fixed cost
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decreases then increase with a "U" shape
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as output increases, total cost
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the change in total revenue associated with one additional unit of input
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as output increases, variable cost
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MRP is greater than or equal to MRC (wages)
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as output increases, average variable cost
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the change in output from hiring one additional unit of labor
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marginal revenue product
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the additional output produced by one more unit of capital
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Continue to hire until...
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the percentage change in price exceeds the percentage change in quantity demanded of a good
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marginal product of labor
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always maximized at the midpoint of any demand curve
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marginal product of capital
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undefined
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demand is said to be inelastic when
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undefined
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total revenue is
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undefined