1. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com BAB 12 PASAR INPUT

2. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Topics to be Discussed u Competitive Factor Markets u Equilibrium in a Competitive Factor Market u Factor Markets with Monopsony Power u Factor Markets with Monopoly Power

3. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Characteristics 1)Large number of sellers of the factor of production 2)Large number of buyers of the factor of production 3)The buyers and sellers of the factor of production are price takers

4. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Demand for a Factor Input When Only One Input Is Variable – Demand for factor inputs is a derived demand… v derived from factor cost and output demand

5. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets Assume v Two inputs: Capital (K) and Labor (L) v Cost of K is r and the cost of labor is w v K is fixed and L is variable Demand for a Factor Input When Only One Input Is Variable Demand for a Factor Input When Only One Input Is Variable

6. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets – Problem v How much labor to hire Demand for a Factor Input When Only One Input Is Variable Demand for a Factor Input When Only One Input Is Variable

7. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Measuring the Value of a Worker’s Output – Marginal Revenue Product of Labor (MRP L ) – MRP L = (MP L )(MR) Demand for a Factor Input When Only One Input Is Variable Demand for a Factor Input When Only One Input Is Variable

8. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Assume perfect competition in the product market – Then MR = P Demand for a Factor Input When Only One Input Is Variable Demand for a Factor Input When Only One Input Is Variable

9. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Question – What will happen to the value of MRP L when more workers are hired? Demand for a Factor Input When Only One Input Is Variable Demand for a Factor Input When Only One Input Is Variable

10. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Marginal Revenue Product Hours of Work Wages ($ per hour) MRP L = MP L x P Competitive Output Market (P = MR) MRP L = MP L x MR Monopolistic Output Market (P < MR)

11. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Choosing the profit-maximizing amount of labor – If MRP L > w (the marginal cost of hiring a worker): hire the worker – If MRP L < w: hire less labor – If MRP L = w: profit maximizing amount of labor Demand for a Factor Input When Only One Input Is Variable Demand for a Factor Input When Only One Input Is Variable

12. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com w*SLSL In a competitive labor market, a firm faces a perfectly elastic supply of labor and can hire as many workers as it wants at w*. Hiring by a Firm in the Labor Market (with Capital Fixed) Quantity of Labor Price of Labor Why not hire fewer or more workers than L*. MRP L = D L L* The profit maximizing firm will hire L* units of labor at the point where the marginal revenue product of labor is equal to the wage rate.

13. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u If the market supply of labor increased relative to demand (baby boomers or female entry), a surplus of labor would exist and the wage rate would fall. u Question – How would this impact the quantity demanded for labor? Demand for a Factor Input When Only One Input Is Variable Demand for a Factor Input When Only One Input Is Variable

14. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com A Shift in the Supply of Labor Quantity of Labor Price of Labor w1w1 S1S1 MRP L = D L L1L1 w2w2 L2L2 S2S2

15. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Comparing Input and Output Markets

16. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Comparing Input and Output Markets – In both markets, input and output choices occur where MR = MC v MR from the sale of the output v MC from the purchase of the input

17. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Scenario – Producing farm equipment with two variable inputs: v Labor v Assembly-line machinery – Assume the wage rate falls Demand for a Factor Input When Several Inputs Are Variable Demand for a Factor Input When Several Inputs Are Variable

18. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u Question – How will the decrease in the wage rate impact the demand for labor? Demand for a Factor Input When Several Inputs Are Variable Demand for a Factor Input When Several Inputs Are Variable

19. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com MRP L1 MRP L2 When two or more inputs are variable, a firm’s demand for one input depends on the marginal revenue product of both inputs. Firm’s Demand Curve for Labor (with Variable Capital) Hours of Work Wages ($ per hour) 0 5 10 15 20 4080120160 When the wage rate is $20, A represents one point on the firm’s demand for labor curve. When the wage rate falls to $15, the MRP curve shifts, generating a new point C on the firm’s demand for labor curve. Thus A and C are on the demand for labor curve, but B is not. DLDL A B C

20. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Assume that all firms respond to a lower wage – All firms would hire more workers. – Market supply would increase. – The market price will fall. – The quantity demanded for labor by the firm will be smaller. Competitive Factor Markets Industry Demand for Labor

21. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com MRP L1 The Industry Demand for Labor Labor (worker-hours) Labor (worker-hours) Wage ($ per hour) Wage ($ per hour) 0 5 10 15 0 5 10 15 50100150L0L0 L2L2 D L1 Horizontal sum if product price unchanged 120 MRP L2 L1L1 Industry Demand Curve D L2 Firm Industry

22. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com The Industry Demand for Labor u Question – How would a change to a non- competitive market impact the derivation of the market demand for labor?

23. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com The Demand for Jet Fuel u Observations – Jet fuel is a factor (input) cost – Cost of jet fuel v 1971--Jet fuel cost equaled 12.4% of total operating cost v 1980--Jet fuel cost equaled 30.0% of total operating cost v 1990’s--Jet fuel cost equaled 15.0% of total operating cost

24. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com The Demand for Jet Fuel u Observations – Airlines responded to higher prices in the 1970’s by reducing the quantity of jet fuel used – Ton-miles increased by 29.6% & jet fuel consumed rose by 8.8%

25. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com The Demand for Jet Fuel u Observations – The demand for jet fuel impacts the airlines and refineries alike – The short-run price elasticity of demand for jet-fuel is very inelastic

26. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Short-run Price Elasticity of Demand for Jet Fuel American-.06Delta-.15 Continental-.09TWA-.10 Northwest-.07United-.10 AirlineElasticityAirlineElasticity

27. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com The Demand for Jet Fuel u Question – How would the long-run price elasticity of demand compare to the short-run?

28. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com The Short- and Long-Run Demand for Jet Fuel Quantity of Jet Fuel Price MRP LR MRP SR

29. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u The Supply of Inputs to a Firm – Determining how much of an input to purchase v Assume a perfectly competitive factor market

30. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com S Market Supply of fabric A Firm’s Input Supply in a Competitive Factor Market Yards of Fabric (thousands) Yards of Fabric (thousands) Price ($ per yard) Price ($ per yard) D Market Demand for fabric 100 ME = AE 10 Supply of Fabric Facing Firm 50 Demand for Fabric MRP Observations 1) The firm is a price taker at $10. 2) S = AE = ME = $10 3) ME = MRP @ 50 units

31. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u The Market Supply of Inputs – The market supply for physical inputs is upward sloping v Examples: jet fuel, fabric, steel – The market supply for labor may be upward sloping and backward bending

32. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u The Supply of Labor – The choice to supply labor is based on utility maximization – Leisure competes with labor for utility – Wage rate measures the price of leisure – Higher wage rate causes the price of leisure to increase

33. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u The Supply of Labor – Higher wages encourage workers to substitute work for leisure (i.e. the substitution effect) – Higher wages allow the worker to purchase more goods, including leisure which reduces work hours (i.e. the income effect)

34. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Competitive Factor Markets u The Supply of Labor – If the income effect exceeds the substitution effect the supply curve is backward bending

35. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Income Effect < Substitution Effect Income Effect > Substitution Effect Backward-Bending Supply of Labor Hours of Work per Day Wage ($ per hour) Supply of Labor

36. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com 12 C Worker chooses point A: 16 hours leisure, 8 hour work Income = $80 16 Q P A w = $10 Substitution and Income Effects of a Wage Increase Hours of Leisure Income ($ per day) 0 240 824 480 20 B w = $20 Suppose wages increase to $20 Substitution effect Income effect Increase wage to $20 worker chooses: 20 hour leisure, 4 hours work income = $80

37. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Labor Supply for One- and Two-Earner Households u Female Percent of Labor Force –1950 -- 29% –1999 -- 60%

38. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Elasticities of Labor Supply (Hours Worked) Head’s HoursSpouse’s HoursHead’s Hours with Respect towith Respect towith Respect to GroupHead’s WageSpouse’s WageSpouse’s Wage Unmarried males.026 (no children) Unmarried females.106 (with children) Unmarried females.011 (no children) One-earner family-.078 (with children) One-earner family.007 (no children) Two-earner family-.002-.086-.004 (with children) Two-earner family-.107-.028-.059 (no children)

39. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Equilibrium in a Competitive Factor Market u A competitive factor market is in equilibrium when the price of the input equates the quantity demanded to the quantity supplied.

40. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com S L = AE D L = MRP L P * MP L Labor Market Equilibrium Number of Workers Wage Competitive Output MarketMonopolistic Output Market wCwC LCLC wMwM LMLM vMvM A B

41. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Labor Market Equilibrium u Equilibrium in a Competitive Output Market – D L (MRP L ) = S L – w C = MRP L – MRP L = (P)(MP L ) – Markets are efficient u Equilibrium in a Monopolistic Output Market – MR < P – MRP = (MR)(MP L ) – Hire L M at wage w M – v M = marginal benefit to consumers – w M = marginal cost to the firm

42. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Labor Market Equilibrium u Equilibrium in a Competitive Output Market – D L (MRP L ) = S L – w C = MRP L – MRP L = (P)(MP L ) – Markets are efficient u Equilibrium in a Monopolistic Output Market – Profits maximized – Using less than the efficient level of input

43. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Economic Rent – For a factor market, economic rent is the difference between the payments made to a factor of production and the minimum amount that must be spent to obtain the use of that factor. Equilibrium in a Competitive Factor Market

44. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Total expenditure (wage) paid is 0w* x AL* Economic Rent Economic rent is ABW* B Economic Rent Number of Workers Wage S L = AE D L = MRP L w* L* A 0 The economic rent associated with the employment of labor is the excess of wages paid above the minimum amount needed to hire workers.

45. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Economic Rent u Question – What would be the economic rent if S L is perfectly elastic or perfectly inelastic?

46. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Land: A Perfectly Inelastic Supply – With land inelastically supplied, its price is determined entirely by demand, at least in the short run. Equilibrium in a Competitive Factor Market

47. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Economic Rent s1s1 Economic Rent s2s2 Land Rent Number of Acres Price ($ per acre) Supply of Land D2D2 D1D1

48. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Pay in the Military u During the Civil War 90% of the armed forces were unskilled workers involved in ground combat. u Today, only 16% are unskilled workers involved in ground combat.

49. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Pay in the Military u Shortages of skilled personnel has occurred? Why? – Hint: If there is a shortage, the wage must be below the…?

50. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com The Shortage of Skilled Military Personnel Number of Skilled Workers Wage SLSL D L = MRP L w* w0w0 Shortage

51. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Pay in the Military u Military pay is based on years of service not MRP. u MRP increases and the private sector pay is greater than military pay. u Many leave the military.

52. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Pay in the Military u Solution – Selective reenlistment bonuses – Base pay on MRP

53. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Factor Markets with Monopsony Power u Assume – The output market is perfectly competitive. – Input market is pure monopsony.

54. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com S L = Average Expenditure (AE) Marginal Expenditure (ME) Why is marginal expenditure greater than S L ? D = MRP L Marginal and Average Expenditure Units of Input Price (per unit of input) 0123465 5 10 15 20 w* = 13 L* wcwc LcLc C

55. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Factor Markets with Monopsony Power u Examples of Monopsony Power – Government v Soldiers v Missiles v B2 Bombers – NASA v Astronauts – Company town

56. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Monopsony Power in the Market for Baseball Players u Baseball owners created a monopsonistic cartel – Reserve clause prevented competition for players – 1975--Free agency after six years – 1969--Average salary was $42,000 ($200,000 in 1999 dollars) – 1997--Average salary was $1,383,578

57. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Baseball owners created a monopolistic cartel – 1975 salaries were 25% of team expenditures – 1980 salaries were 40% of team expenditures Monopsony Power in the Market for Baseball Players

58. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Teenage Labor Markets and the Minimum Wage u When the minimum wage rose in New Jersey in 1992 from $4.25 to $5.05, a survey conducted found a 13% increase in employment.

59. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Explanations – Reduction in fringe benefits – Lower pay for more productive workers – Monopsony market Teenage Labor Markets and the Minimum Wage

60. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Findings – None of the explanations are validated by the survey results – Indicates of the need for further study Teenage Labor Markets and the Minimum Wage

61. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Factor Markets with Monopoly Power u Just as buyers of inputs can have monopsony power, sellers of inputs can have monopoly power. u The most important example of monopoly power in factor markets involves labor unions.

62. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com SLSL DLDL MR When a labor union is a monopolist, it chooses among points on the buyer’s demand for labor curve. Monopoly Power of Sellers of Labor Number of Workers Wage per worker A L*L* w*w* The seller can maximize the number of workers hired, at L*, by agreeing that workers will work at wage w*.

63. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Economic Rent w1w1 L1L1 The quantity of labor L 1 that maximizes the rent that employees earn is determined by the intersection of the marginal revenue and supply or labor curves; union members receive a wage rate of w 1. SLSL DLDL MR Monopoly Power of Sellers of Labor Number of Workers Wage per worker A L2L2 w2w2 Finally, if the union wishes to maximize total wages paid to workers, it should allow L 2 union members to be employed at a wage rate of w 2 because the marginal revenue to the union will then be zero. L*L* w*w*

64. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u The primary determinant of controlling wage and economic rent is controlling the supply of labor Factor Markets with Monopoly Power

65. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u A Two-Sector Model of Labor Employment – Union monopoly power impacts the nonunionized part of the economy. Factor Markets with Monopoly Power

66. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Wage Determination in Unionized and Nonunionized Sectors Number of Workers Wage per worker DUDU D NU DLDL SLSL w* wUwU When a monopolistic union raises the wage rate in the unionized sector of the economy from w* to w U, employment in that sector falls. For the total supply of labor to remain unchanged, the wage in the nonunionized sector must fall from w* to w NU.. w NU

67. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Bilateral Monopoly – Market in which a monopolist sells to a monopsonist. Factor Markets with Monopoly Power

68. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Bilateral Monopoly Number of Workers Wage per worker D L = MRP L MR 5 10 15 20 25 102040 S L = AE ME 25 19 Wage Possibilities wCwC

69. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Bilateral Monopoly Number of Workers Wage per worker D L = MRP L MR 5 10 15 20 25 102040 S L = (AE) ME 25 19 wCwC u Observations – Hiring without union monopoly power v MRP = ME at 20 workers and w = $10/hr – Union’s objective v MR = MC at 25 workers and w = $19/hr

70. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Bilateral Monopoly u Who Will Win? – The union will if its threat to strike is credible. – The firm will if its threat to hire non-union workers is credible. – If both make credible threats the wage will be at w c.

71. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com The Decline of Private Sector Unionism u Observations – Union membership and monopoly power has been declining. – Initially, during the 1970’s, union wages relative to nonunion wages fell.

72. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Observations – In the 1980’s union wages stabilized relative to non-union wages. – In the 1990’s membership has been falling and wage differential has remained stable. The Decline of Private Sector Unionism

73. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com u Explanation – The unions have been attempting to maximize the individual wage rate instead of total wages paid. – The demand for unionized employees has probably become increasingly elastic as firms find it easier to substitute capital for skilled labor. The Decline of Private Sector Unionism

74. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Wage Inequality--Have Computers Changed the Labor Market? u 1950 - 1980 –Relative wage of college graduates to high-school graduates hardly changed u 1980-1995 –The relative wage grew rapidly

75. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Wage Inequality--Have Computers Changed the Labor Market? u In 1984, 25.1% of all workers used computers u 1993 -- 46.6% u 1999 -- nearly 60%

76. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Wage Inequality--Have Computers Changed the Labor Market? u Percent change in use of computers –College degrees v 1984 - 1993 -- 42 to 70% –Less than high school degree v 5 to 10% –With high school degree v 19 to 35%

77. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Wage Inequality--Have Computers Changed the Labor Market? u Growth in wages -- 1983 - 1994 –College graduates using computers - 11% –Non-computer users -- less than 4%

78. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Wage Inequality--Have Computers Changed the Labor Market? u 1993 - 1997 –High school dropouts out of school less than 10 years earned 29% less than high school graduates –1963 -- The differential was only 19%

79. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Wage Inequality--Have Computers Changed the Labor Market? u 1993 - 1997 –Average weekly wage for college graduates (out of school less than 10 years) was 96% higher than high school graduates. –College graduation premium has more than doubled.

80. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Summary u In a competitive input market, the demand for an input is given by the MRP, the product of the firm’s marginal revenue, and the marginal product of the input. u A firm in a competitive labor market will hire workers to the point at which the marginal revenue product of labor is equal to the wage rate.

81. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Summary u The market demand for an input is the horizontal sum of the industry demands for the input. u When factor markets are competitive, the buyer of an input assumes that its purchase will have no effect on the price of the input.

82. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Summary u The market supply of a factor such as labor need not be upward sloping. u Economic rent is the difference between the payments to factors of production and the minimum payment that would be needed to employ those factors.

83. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Summary u When a buyer of an input has monopsony power, the marginal expenditure curve lies above the average expenditure curve. u When the input seller is a monopolist such as a labor union, the seller chooses the point on the marginal revenue product curve that best suits its objective.

84. nuhfil hanani : web site : www.nuhfil.com, email : nuhfil@yahoo.com Summary u When a monopolistic union bargains with a monopsonistic employer, the wage rate depends on the nature of the bargaining process.