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Graphing Production 1. Three Stages of Returns Total Product Quantity of Labor Marginal and Average Product Quantity of Labor Total Product Stage I: Increasing.

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Presentation on theme: "Graphing Production 1. Three Stages of Returns Total Product Quantity of Labor Marginal and Average Product Quantity of Labor Total Product Stage I: Increasing."— Presentation transcript:

1 Graphing Production 1

2 Three Stages of Returns Total Product Quantity of Labor Marginal and Average Product Quantity of Labor Total Product Stage I: Increasing Marginal Returns MP rising. TP increasing at an increasing rate. Why? Specialization. Average Product 2 Marginal Product

3 Three Stages of Returns Total Product Quantity of Labor Marginal and Average Product Quantity of Labor Total Product Stage II: Decreasing Marginal Returns MP Falling. TP increasing at a decreasing rate. Why? Fixed Resources. Each worker adds less and less. Average Product 3 Marginal Product

4 Total Product Quantity of Labor Marginal and Average Product Quantity of Labor Total Product Stage III: Negative Marginal Returns MP is negative. TP decreasing. Workers get in each others way Marginal Product Average Product 4 Three Stages of Returns

5 The Law of Diminishing Marginal Returns is NOT the results of laziness, it is the result of limited fixed resources. 5

6 With your partner calculate MP and AP then discuss what the graphs for TP, MP, and AP look like. Remember quantity of workers goes on the x-axis. # of Workers (Input) Total Product(TP) PIZZAS Marginal Product(MP) Average Product(AP) 00 110 225 345 460 570 675 7 870 6

7 # of Workers (Input) Total Product(TP) PIZZAS Marginal Product(MP) Average Product(AP) 00 -- 110 225 15 345 20 460 15 570 10 675 5 7 0 870 -5 With your partner calculate MP and AP then discuss what the graphs for TP, MP, and AP look like. Remember quantity of workers goes on the x-axis. 7

8 # of Workers (Input) Total Product(TP) PIZZAS Marginal Product(MP) Average Product(AP) 00 -- 110 225 1512.5 345 2015 460 15 570 1014 675 512.5 775 010.71 870 -58.75 With your partner calculate MP and AP then discuss what the graphs for TP, MP, and AP look like. Remember quantity of workers goes on the x-axis. 8

9 # of Workers (Input) Total Product(TP) PIZZAS Marginal Product(MP) Average Product(AP) 00 -- 110 225 1512.5 345 2015 460 15 570 1014 675 512.5 775 010.71 870 -58.75 Identify the three stages of returns 9

10 # of Workers (Input) Total Product(TP) PIZZAS Marginal Product(MP) Average Product(AP) 00 -- 110 225 1512.5 345 2015 460 15 570 1014 675 512.5 775 010.71 870 -58.75 Identify the three stages of returns 10

11 More Examples of the Law of Diminishing Marginal Returns Example #1: Learning curve when studying for an exam Fixed Resources-Amount of class time, textbook, etc. Variable Resources-Study time at home Marginal return-  1 st hour-large returns  2 nd hour-less returns  3 rd hour-small returns  4 th hour- negative returns (tired and confused) Example #2: A Farmer has fixed resource of 8 acres planted of corn. If he doesn’t clear weeds he will get 30 bushels. If he clears weeds once he will get 50 bushels. Twice -57, Thrice-60. Additional returns diminishes each time. 11

12 Costs of Production 12

13 Accountants vs. Economists Accounting Profit Total Revenue Accounting Costs (Explicit Only) Accountants look at only EXPLICIT COSTS Explicit costs (out of pocket costs) are payments paid by firms for using the resources of others. Example: Rent, Wages, Materials, Electricity Bills Economists examine both the EXPLICIT COSTS and the IMPLICIT COSTS Implicit costs are the opportunity costs that firms “pay” for using their own resources Example: Forgone Wage, Forgone Rent, Time Economic Profit Total Revenue Economic Costs (Explicit + Implicit) 13

14 Accountants vs. Economists Accounting Profit Total Revenue Accounting Costs (Explicit Only) Accountants look at only EXPLICIT COSTS Explicit costs (out of pocket costs) are payments paid by firms for using the resources of others. Example: Rent, Wages, Materials, Electricity Bills Economists examine both the EXPLICIT COSTS and the IMPLICIT COSTS Implicit costs are the opportunity costs that firms “pay” for using their own resources Example: Forgone Wage, Forgone Rent, Time Economic Profit Total Revenue Economic Costs (Explicit + Implicit) From now on, all costs are automatically ECONOMIC COSTS 14

15 Short-Run Production Costs 15

16 Definition of the “Short-Run” We will look at both short-run and long-run production costs. Short-run is NOT a set specific amount of time. The short-run is a period in which at least one resource is fixed. –Plant capacity/size is NOT changeable In the long-run ALL resources are variable –NO fixed resources –Plant capacity/size is changeable Today we will examine Short-run costs. 16

17 Total Costs FC = Total Fixed Costs VC = Total Variable Costs TC = Total Costs Per Unit Costs AFC = Average Fixed Costs AVC = Average Variable Costs ATC = Average Total Costs MC = Marginal Cost Different Economic Costs 17

18 Fixed Costs: Costs for fixed resources that DON’T change with the amount produced Ex: Rent, Insurance, Managers Salaries, etc. Average Fixed Costs = Fixed Costs Quantity Variable Costs: Costs for variable resources that DO change as more or less is produced Ex: Raw Materials, Labor, Electricity, etc. Average Variable Costs = Variable Costs Quantity Definitions 18

19 Total Cost: Sum of Fixed and Variable Costs Average Total Cost = Total Costs Quantity Marginal Cost: Marginal Cost = Change in Total Costs Change in Quantity Additional costs of an additional output. Ex: If the production of two more output increases total cost from $100 to $120, the MC is _____. Definitions $10 19

20 Calculating TC, VC, FC, ATC, AFC, and MC TPVCFCTCMCAVCAFCATC 00100 110 216 321 426 530 636 746 Draw this in your notes 20

21 Calculating TC, VC, FC, ATC, AFC, and MC TPVCFCTCMCAVCAFCATC 00100 110100 216100 321100 426100 530100 636100 746100 21

22 Calculating TC, VC, FC, ATC, AFC, and MC TPVCFCTCMCAVCAFCATC 00100 110100110 216100116 321100121 426100126 530100130 636100136 746100146 22

23 TOTAL COSTS GRAPHICALLY Quantity TC Fixed Cost VC FC Combining VC With FC to get Total Cost 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Costs (dollars) 800 700 600 500 400 300 200 100 0 23

24 Quantity Costs (dollars) TC Fixed Cost VC FC Combining VC With FC to get Total Cost 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 What is the TOTAL COST, FC, and VC for producing 9 units? TOTAL COSTS GRAPHICALLY 800 700 600 500 400 300 200 100 0 24

25 Per Unit Costs TPVCFCTCMCAVCAFCATC 00100 - 110100110 216100116 321100121 426100126 530100130 636100136 746100146 25

26 Per Unit Costs TPVCFCTCMCAVCAFCATC 00100 - 11010011010 2161001166 3211001215 4261001265 5301001304 6361001366 74610014610 26

27 TPVCFCTCMCAVCAFCATC 00100 -- 11010011010 21610011668 32110012157 42610012656.5 53010013046 63610013666 746100146106.6 Per Unit Costs 27

28 TPVCFCTCMCAVCAFCATC 00100 --- 11010011010 100 2161001166850 3211001215733.3 42610012656.525 5301001304620 6361001366616.67 746100146106.614.3 Asymptote Per Unit Costs 28

29 TPVCFCTCMCAVCAFCATC 00100 ---- 11010011010 100110 216100116685058 3211001215733.340.3 42610012656.52531.5 530100130462026 6361001366616.6722.67 746100146106.614.320.9 Per Unit Costs 29

30 TPVCFCTCMCAVCAFCATC 00100 ---- 11010011010 100110 216100116685058 3211001215733.340.3 42610012656.52531.5 530100130462026 6361001366616.6722.67 746100146106.614.320.9 Per Unit Costs 30

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