Answers to Assignment Ten
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1 Answers to Assignment Ten 1. The table below shows the total production a firm will be able to obtain if it employs varying amounts of factor X while the amounts of the other factors the firm employs remain constant. Compute the marginal product of each of the seven units of factor X and enter these figures in the table. Assume the product the firm produces sells in the market for $3.00 per unit. Compute the total revenue of the firm at each of the eight levels of output and the marginal revenue product of each of the seven units of factor X. Enter these figures in the table below. Quantity of factor X Total Total revenue employed product product of X revenue product of X 0 0 $ 1 24 $ On the basis of your computations complete the firm s demand schedule for factor X by indicating in the table below how many units of factor X the firm would employ at the given prices. Quantity of Price of X X demanded $
2 Quantity of factor X Total Total revenue employed product product of X revenue product of X 0 0 $ $ Quantity of Price of X X demanded $ Use the following total-product schedule for a factor to answer the next three questions. Assume that the quantities of other factors the firm employs remain constant. Units of Total factor product (a) If the firm s product sells for a constant $2 per unit, what is the marginal revenue product of the third unit of the factor? (b) If the firm s product sells for a constant $2 per unit and the price of this factor is $8, how many units of the factor will the firm employ? (c) If the firm can sell 12 units of output at a price of $1.00 per unit and 21 units of output at a price of $0.80 per unit, what is the marginal revenue product of the second unit of the factor?
3 (a) $12. The third worker increases TP by 6 units. 6 x $2 = $12. (b) 5 units. The marginal product of the fifth factor is 4 units of output (4 x $2 = $8). Thus, MRP = $8 and MFC = $8 when the fifth factor is employed. (c) $4.80. The total revenue from 1 unit of factor is $12.00 (12 x $1.00). The total revenue with 2 units of factor is $16.80 (21 x $0.80). The difference is the MRP of the second factor or $ Complete the following table, where L is the units of labour, TP L is the total product of labour, MP L is the marginal product of labour, P is product price, TR is total revenue, and MRP L is the marginal revenue product of labour. L TP L MP L P TR MRP L 0 0 $ $ $ (a) In what type of market is the firm selling its product? How do you know? (b) Why does the MRP schedule decrease as labour increases? (c) Complete the following table: $
4 L TP L MP L P TR MRP L 0 0 $ $20 $ $ (a) The firm is selling in a purely competitive market because product price is constant at $2.00. (b) MRP decreases as labour increases solely because of the law of diminishing returns. The marginal product of labour will fall, which causes MRP to fall as more and more workers are hired. (c) See table above. 4. Complete the following table, where L is the units of labour, TP L is the total product of labour, MP L is the marginal product of labour, P is product price, TR is total revenue, and MRP L is the marginal revenue product of labour. L TP L MP L P TR MRP L 0 0 $2.00 $ $
5 (a) In what type of market is the firm selling its product? How do you know? (b) Why does the MRP schedule decrease as labour increases? (c) Complete the following table: $ L TP L MP L P TR MRP L 0 0 $2.00 $ $ $ (a) An imperfectly competitive market because price declines as more units are produced. (b) Because the marginal product of labour decreases and because the price of the product decreases. (c) See table above.
6 5. Indicate how the following events will shift the firm s demand curve for labour: increase it (I); decrease it (D); keep it the same (S). Technological advances increase labour s productivity. The wage rate increases. The demand for the product that labour produces decreases. The wage rate decreases. Absenteeism reduces labour s productivity. The price of labour-saving machinery is reduced and the substitution effect is greater than the output effect. I Technological advances increase labour s productivity. S The wage rate increases. D The demand for the product that labour produces decreases. S The wage rate decreases. D Absenteeism reduces labour s productivity. D The price of labour-saving machinery is reduced and the substitution effect is greater than the output effect. 6. In the table below are the marginal-product and marginal-revenue-product schedules for factor A and factor B. Both factors are variable and are employed in perfectly competitive markets. The price of A is $1 and the price of B is $2. Quantity of revenue Quantity of revenue factor A product product factor B product product employed of A of A employed of B of B 1 20 $ $ (a) What is the least-cost combination of factors A and B that would enable the firm to produce 120 units of output? (b) What is the profit-maximizing combination of A and B? (c) What is total output and profit when the firm is employing the profitmaximizing combinations of A and B? (a) Use the formula MP A /P A =MP B /P B. In this case, 120 units can be produced by employing 5 units of A and 3 units of B. To check: (8/$1)=(16/$2).
7 (b) Use the formula MRP A /P A =MRP B /P B =1. In this data, profit is maximized by employing 6 units of A and 5 units of B. To check: ($1.00/$1.00)=($2.00/$2.00)=1. (c) Total output is 144 units. The total cost of factors is $16[($1 X 6) + ($2 X 5)]. The total revenue is $36(144 X $0.25). Total profit is $20.
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