Agri 2312 chapter 6 introduction to production and resource use
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Transcript of Agri 2312 chapter 6 introduction to production and resource use
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Introduction toProduction and
Resource Use
Chapter 6
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Topics of Discussion
Conditions of perfect competitionClassification of inputsImportant production relationships
(assume one variable input in this chapter)
Assessing short run business costsEconomics of short run decisions
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Conditions for Perfect Competition
Homogeneous productsNo barriers to entry or exitLarge number of sellersPerfect information
Page 86
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Classification of Inputs
Land: includes renewable (forests) and non-renewable (minerals) resources
Labor: all owner and hired labor services, excluding management
Capital: manufactured goods such as fuel, chemicals, tractors and buildings
Management: production decisions designed to achieve specific economic goal
Pages 86-87
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Production Function
Output = f(labor | capital, land, and management)
Start withone variable
input
Start withone variable
input
Page 88
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Production Function
Output = f(labor | capital, land, and management)
Start withone variable
input
Start withone variable
input
assume all other inputsfixed at their currentlevels…
assume all other inputsfixed at their currentlevels…
Page 88
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Coordinates of input andoutput on the TPP curve
Coordinates of input andoutput on the TPP curve
Page 89
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 89
Total Physical Product (TPP) Curve
Variable inputVariable input
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Law of DiminishingMarginal Returns
“As successive units of a variableinput are added to a production process with the other inputs heldconstant, the marginal physicalproduct (MPP) eventually declines”
Page 93
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Other Physical RelationshipsThe following derivations of the TPP curve playAn important role in decision-making:
MarginalPhysical = Output ÷ InputProduct
Page 90
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Other Physical RelationshipsThe following derivations of the TPP curve playAn important role in decision-making:
MarginalPhysical = Output ÷ InputProduct
AveragePhysical = Output ÷ InputProduct
Pages 90-91
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Change in output asyou increase inputs
Change in output asyou increase inputs
Page 89
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 89
Total Physical Product (TPP) Curve
outputoutput
inputinput
Marginal physical product is .45 as labor is increased from 16 to 20
Marginal physical product is .45 as labor is increased from 16 to 20
4.8
3
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 89
Output per unitinput use
Output per unitinput use
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 89
Total Physical Product (TPP) Curve
outputoutput
inputinput
Average physical product is .31 if labor use is 26
Average physical product is .31 if labor use is 26
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Plotting the MPP curvePlotting the MPP curve
Page 91
Change in outputassociated with achange in inputs
Change in outputassociated with achange in inputs
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Marginal Physcial ProductMarginal Physcial Product
Page 91
Change from point A to point B on the production function is an MPP of 0.33
Change from point A to point B on the production function is an MPP of 0.33
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 91
Plotting the APP CurvePlotting the APP Curve
Level of outputdivided by the levelof input use
Level of outputdivided by the levelof input use
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 91
Average Physical ProductAverage Physical Product
Output dividedby labor use is equal to 0.19
Output dividedby labor use is equal to 0.19
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 91
Three Stages of ProductionThree Stages of Production
Average physicalproduct (yield) is
increasing in Stage I
Average physicalproduct (yield) is
increasing in Stage I
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 91
Three Stages of ProductionThree Stages of Production
Marginal physicalproduct falls below the
average physicalproduct in Stage II
Marginal physicalproduct falls below the
average physicalproduct in Stage II
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 91
Three Stages of ProductionThree Stages of Production
MPP goes negativeas shown on Page 89…
MPP goes negativeas shown on Page 89…
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 91
Three Stages of ProductionThree Stages of Production
Why are Stage I andStage III irrational?
Why are Stage I andStage III irrational?
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 114
Three Stages of ProductionThree Stages of Production
Productivity rising so why stop???
Productivity rising so why stop???
Output falling
Output falling
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Three Stages of ProductionThree Stages of Production
The question therefore is where should I operate in Stage II?
The question therefore is where should I operate in Stage II?
Page 114
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Economic DimensionWe need to account for the price of
the product.We also need to account for the cost
of the inputs.Total Cost of production is the costs
associated with the use of all inputs – Fixed costs
– Variable costs
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Key Cost RelationshipsThe following cost derivations play a keyrole in decision-making:
Marginal cost = total cost ÷ output
Page 94-96
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Key Cost RelationshipsThe following cost derivations play a keyrole in decision-making:
Marginal cost = total cost ÷ output
Averagevariable = total variable cost ÷ output cost
Page 94-96
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Key Cost RelationshipsThe following cost derivations play a keyrole in decision-making:
Marginal cost = total cost ÷ output
Averagevariable = total variable cost ÷ output cost
Average total = total cost ÷ output cost
Page 94-96
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
From TPP curve onpage 89
From TPP curve onpage 89
Page 94
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Fixed costs are$100 no matter
the level ofproduction
Fixed costs are$100 no matter
the level ofproduction Page 94
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Column (2)divided bycolumn (1)
Column (2)divided bycolumn (1)
Page 94
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 94
Costs that varywith level of production
Costs that varywith level of production
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 94
Column (4) divided by column (1)
Column (4) divided by column (1)
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 94
Column (2) plus
column (4)
Column (2) plus
column (4)
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 94
Change in column (6) associated with a
change in column (1)
Change in column (6) associated with a
change in column (1)
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 94
Column (6) divided by column (1) or
Column (6) divided by column (1) or
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 94
or column (3) pluscolumn (5)
or column (3) pluscolumn (5)
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Let’s graph the cost series in this table
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Plotted cost relationshipsfrom table 6.3 on page 94
Plotted cost relationshipsfrom table 6.3 on page 94
Page 95
OSDO BE
Plotting costs for levels of outputPlotting costs for levels of output
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Marginal and Average Revenue
• Marginal revenue = ∆total revenue ÷ ∆output
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Now let’s assume this firm can sell its
product for $45/unit
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Key Revenue ConceptsKey Revenue Concepts
Notice the price in column (2) is identical to marginal revenue in column(7). What about average revenue, or AR? What do you see if you divide total revenue in column (3) by output in column (1)? Yes, $45. Thus, P = MR = AR under perfect competition.
Notice the price in column (2) is identical to marginal revenue in column(7). What about average revenue, or AR? What do you see if you divide total revenue in column (3) by output in column (1)? Yes, $45. Thus, P = MR = AR under perfect competition.
Page 98
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Let’s see this in graphical form
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 99
Profit maximizinglevel of output,where MR=MC
Profit maximizinglevel of output,where MR=MC
P=MR=AR $45$45
11.211.2
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 99
AverageProfit = $17, or AR – ATC
AverageProfit = $17, or AR – ATC
P=MR=AR
$45-$28$45-$28
$28$28
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Grey area representstotal economic profitif the price is $45…
Grey area representstotal economic profitif the price is $45…
Page 99
P=MR=AR
11.2 ($45 - $28) = $190.4011.2 ($45 - $28) = $190.40
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Zero economic profitif price falls to PBE.Firm would only produceoutput OBE . AR-ATC=0
Zero economic profitif price falls to PBE.Firm would only produceoutput OBE . AR-ATC=0 Page 99
P=MR=AR
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Economic lossesif price falls to PSD.Firm would shut downbelow output OSD
Economic lossesif price falls to PSD.Firm would shut downbelow output OSD Page 99
P=MR=AR
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Where is the firm’ssupply curve?
Where is the firm’ssupply curve?
Page 99
P=MR=AR
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Page 99
P=MR=AR
Marginal cost curveabove AVC curve?
Marginal cost curveabove AVC curve?
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
© 2010 Pearson Higher Education,Upper Saddle River, NJ 07458. • All Rights
Reserved.
Key Revenue ConceptsKey Revenue Concepts
Page 98
The previous graph indicated that profit is maximized at 11.2units of output, where MR ($45) equals MC ($45). This occursbetween lines G and H on the table above, where at 11.2 unitsof output profit would be $190.40. Let’s do the math….
The previous graph indicated that profit is maximized at 11.2units of output, where MR ($45) equals MC ($45). This occursbetween lines G and H on the table above, where at 11.2 unitsof output profit would be $190.40. Let’s do the math….
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Doing the math….Produce 11.2 units of output (OMAX on p. 99)Price of product = $45.00Total revenue = 11.2 × $45 = $504.00
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Doing the math….Produce 11.2 units of outputPrice of product = $45.00Total revenue = 11.2 × $45 = $504.00
Average total cost at 11.2 units of output = $28Total costs = 11.2 × $28 = $313.60Profit = $504.00 – $313.60 = $190.40
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Doing the math….Produce 11.2 units of outputPrice of product = $45.00Total revenue = 11.2 × $45 = $504.00
Average total cost at 11.2 units of output = $28Total costs = 11.2 × $28 = $313.60Profit = $504.00 – $313.60 = $190.40
Average profit = AR – ATC = $45 – $28 = $17Profit = $17 × 11.2 = $190.40
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Profit at Price of $45?
28
P =45
$
Q11.2
MC
ATC
AVC
Revenue = $45 11.2 = $504.00Total cost = $28 11.2 = $313.60Profit = $504.00 – $313.60 = $190.40
Since P = MR = ARAverage profit = $45 – $28 = $17Profit = $17 11.2 = $190.40
Revenue = $45 11.2 = $504.00Total cost = $28 11.2 = $313.60Profit = $504.00 – $313.60 = $190.40
Since P = MR = ARAverage profit = $45 – $28 = $17Profit = $17 11.2 = $190.40
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Profit at Price of $45?
28
P =45
$
Q11.2
MC
ATC
AVC
Revenue = $45 11.2 = $504.00Total cost = $28 11.2 = $313.60Profit = $504.00 – $313.60 = $190.40
Since P = MR = ARAverage profit = $45 – $28 = $17Profit = $17 11.2 = $190.40
Revenue = $45 11.2 = $504.00Total cost = $28 11.2 = $313.60Profit = $504.00 – $313.60 = $190.40
Since P = MR = ARAverage profit = $45 – $28 = $17Profit = $17 11.2 = $190.40
$190.40
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Price falls to $28.00….Produce 10.3 units of output (OBE on p. 99)Price of product = $28.00Total revenue = 10.3 × $28 = $288.40
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Price falls to $28.00….Produce 10.3 units of output Price of product = $28.00Total revenue = 10.3 × $28 = $288.40
Average total cost at 10.3 units of output = $28Total costs = 10.3 × $28 = $288.40Profit = $288.40 – $288.40 = $0.00
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Price falls to $28.00….Produce 10.3 units of outputPrice of product = $28.00Total revenue = 10.3 × $28 = $288.40
Average total cost at 10.3 units of output = $28Total costs = 10.3 × $28 = $288.40Profit = $288.40 – $288.40 = $0.00
Average profit = AR – ATC = $28 – $28 = $0Profit = $0 × 10.3 = $0.00
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Profit at Price of $28?
P=28
45
$
Q11.210.3
MC
ATC
AVC
Revenue = $28 10.3 = $288.40Total cost = $28 10.3 = $288.40Profit = $288.40 – $288.40 = $0
Since P = MR = ARAverage profit = $28 – $28 = $0Profit = $0 10.3 = $0 (break even)
Revenue = $28 10.3 = $288.40Total cost = $28 10.3 = $288.40Profit = $288.40 – $288.40 = $0
Since P = MR = ARAverage profit = $28 – $28 = $0Profit = $0 10.3 = $0 (break even)
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Price falls to $18.00….Produce 8.6 units of output (OSD on p. 99)Price of product = $18.00Total revenue = 8.6 × $18 = $154.80
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Price falls to $18.00….Produce 8.6 units of outputPrice of product = $18.00Total revenue = 8.6 × $18 = $154.80
Average total cost at 8.6 units of output = $28Total costs = 8.6 × $28 = $240.80Profit = $154.80 – $240.80 = – $86.00
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Price falls to $18.00….Produce 8.6 units of outputPrice of product = $18.00Total revenue = 8.6 × $18 = $154.80
Average total cost at 8.6 units of output = $28Total costs = 8.6 × $28 = $240.80Profit = $154.80 – $240.80 = – $86.00
Average profit = AR – ATC = $18 – $28 = – $10Profit = – $10 × 8.6 = – $86.00
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Profit at Price of $18?
28
P=18
45
$
Q11.210.38.6
MC
ATC
AVC
Revenue = $18 8.6 = $154.80Total cost = $28 8.6 = $240.80Profit = $154.80 – $240.80 = $0
Since P = MR = ARAverage profit = $18 – $28 = –$10Profit = –$10 8.6 = –$86 (Loss)
Revenue = $18 8.6 = $154.80Total cost = $28 8.6 = $240.80Profit = $154.80 – $240.80 = $0
Since P = MR = ARAverage profit = $18 – $28 = –$10Profit = –$10 8.6 = –$86 (Loss)
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Price falls to $10.00….Produce 7.0 units of output (below OSD on p. 99)Price of product = $10.00Total revenue = 7.0 × $10 = $70.00
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Price falls to $10.00….Produce 7.0 units of output Price of product = $10.00Total revenue = 7.0 × $10 = $70.00
Average total cost at 7.0 units of output = $28Total costs = 7.0 × $28 = $196.00Profit = $70.00 – $196.00 = – $126.00
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Price falls to $10.00….Produce 7.0 units of output Price of product = $10.00Total revenue = 7.0 × $10 = $70.00
Average total cost at 7.0 units of output = $30Total costs = 7.0 × $30 = $210.00Profit = $70.00 – $210.00 = – $140.00
Average variable costs = $19 Total variable costs = $19 × 7.0 = $133.00 Revenue – variable costs = –$63.00 !!!!!
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Profit at Price of $10?
28
P=10
18
45
$
Q11.210.38.6
MC
ATC
AVC
7.0
Revenue = $10 7.0 = $70.00Total cost = $30 7.0 = $210.00Profit = $70.00 – $210.00 = $140.00
Since P = MR = ARAverage profit = $10 – $30 = –$20Profit = –$20 7.0 = –$140
Average variable cost = $19Variable costs = $19 7.0 = $133.00Revenue – variable costs = –$63Not covering variable costs!!!!!!
Revenue = $10 7.0 = $70.00Total cost = $30 7.0 = $210.00Profit = $70.00 – $210.00 = $140.00
Since P = MR = ARAverage profit = $10 – $30 = –$20Profit = –$20 7.0 = –$140
Average variable cost = $19Variable costs = $19 7.0 = $133.00Revenue – variable costs = –$63Not covering variable costs!!!!!!
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The Firm’s Supply Curve
28
P=10
18
45
$
Q11.210.38.6
MC
ATC
AVC
7.0
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Now let’s look at the demand for a single
input: Labor
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Key Input RelationshipsThe following input-related derivations also play a key role in decision-making:
Marginal value = marginal physical product × price product
Page 100
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Key Input RelationshipsThe following input-related derivations also play a key role in decision-making:
Marginal value = marginal physical product × price product
Marginal input = wage rate, rental rate, etc. cost
Page 100
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Page 101
5
B
C
D
E
FG
HI
J
Wage rate representsthe MIC for labor
Wage rate representsthe MIC for labor
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Page 101
5
B
C
D
E
FG
HI
J
Use a variable input likelabor up to the point where the value received from the market equals the cost of another unit of input, or MVP=MIC
Use a variable input likelabor up to the point where the value received from the market equals the cost of another unit of input, or MVP=MIC
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Page 101
5
The area below thegreen lined MVPcurve and above thegreen lined MICcurve representscumulative net benefit.
The area below thegreen lined MVPcurve and above thegreen lined MICcurve representscumulative net benefit.
B
C
D
E
FG
HI
J
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Page 100MVP = MPP × $45MVP = MPP × $45
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Page 100Profit maximized where MVP = MICor where MVP =$5 and MIC = $5
Profit maximized where MVP = MICor where MVP =$5 and MIC = $5
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Page 100
Marginal net benefit in column (5)is equal to MVP in column (3) minusMIC of labor in column (4)
Marginal net benefit in column (5)is equal to MVP in column (3) minusMIC of labor in column (4)
=–
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Page 100
The cumulative net benefit in column (6) is equal to the sum of successive marginal net benefit in column (5)
The cumulative net benefit in column (6) is equal to the sum of successive marginal net benefit in column (5)
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Page 100
For example…$25.10 = $9.85 + $15.25$58.35 = $25.10 + $33.25
For example…$25.10 = $9.85 + $15.25$58.35 = $25.10 + $33.25
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Page 100
=–
Cumulative net benefitis maximized whereMVP=MIC at $5
Cumulative net benefitis maximized whereMVP=MIC at $5
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Page 101
5
If you stopped at point E on the MVP curve, for example, you would be foregoing all of the potential profit lying to the right of that point up to where MVP=MIC.
If you stopped at point E on the MVP curve, for example, you would be foregoing all of the potential profit lying to the right of that point up to where MVP=MIC.
B
C
D
E
FG
HI
J
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Page 101
5
If you went beyond the point where MVP=MIC, you begin incurring losses.
If you went beyond the point where MVP=MIC, you begin incurring losses.
B
C
D
E
FG
HI
J
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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A Final ThoughtOne final relationship needs to be made. The levelof profit-maximizing output (OMAX) in the graph on page 99 where MR = MC corresponds directly withthe variable input level (LMAX) in the graph on page 101 where MVP = MIC.
Going back to the production function on page 88,this means that:
OMAX = f(LMAX | capital, land and management)
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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In Summary…Features of perfect competitionFactors of production (Land, Labor,
Capital and Management)Key decision rule: Profit maximized at
output MR=MCKey decision rule: Profit maximized
where MVP=MIC
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Introduction to Agricultural Economics, 5th edPenson, Capps, Rosson, and Woodward
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Chapter 7 focuses on the choice of inputs to use and products to produce….