ECON 040 Lecture Notes - Lecture 11: Marginal Revenue, Sunk Costs, Marginal Cost

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blackpig616

10 Aug 2020

School

College of The Sequoias

Department

Economics (ECON)

Course

ECON 040

Professor

Tootle

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Document Summary

Major difference from prior model in application to a real firm: Entrepreneur must pay a sunk cost to start production a cost that cannot be recovered. Fixed factor of production the associated fixed cost does not vary with quantity produced. Variable factor of production the associated variable cost varies with quantity produced. Short run - period of time when at least one factor of production is fixed. Long run period of time during which all factors of production are variable. The entrepreneur"s decisions may differ depending on the short/long run. The entrepreneur sells cans of soda for . 20. Machinery rented at a day (fixed cost) Employees cost a day (variable cost) Table then shows the number of cans that can be produced depending on how many employees are hired. Calculate marginal cost of each can: assess the change in total cost ( tc) and divide by change in quantity of cans produced ( q) (sh. 30)

Related Questions

Question:

Is it true that in a short-run production process, the marginal cost curve eventually slopes upward because firms have to pay workers a higher wage rate as they produce more output? Explain your answer.

Answer:

According to the definition of the short-run in Investopedia, the short-run, in economics, expresses the concept that an economy behaves differently depending on the length of time it has to react to certain stimuli. The short-run does not refer to a specific duration of time but rather is unique to the firm, industry, or economic variable being studied. A key principle guiding the concept of short-run and long-run is that in the short-run, firms face both variable and fixed costs, which means that output, wages and prices do not have full freedom to reach a new equilibrium. Most businesses make decisions not only about how many workers to employ at any given point in time (i.e. the amount of labor) but also about what scale of an operation (i.e. size of factory, office, etc.) to put together and what production processes to use. In contrast, economists often define the short-run as the time horizon over which the scale of operation is fixed and the only available business decision is the number of workers to employ. Technically, the short-run could also represent a situation where the amount of labor is fixed and the amount of capital is variable, but this is fairly uncommon. The logic is that even taking various labor laws as given, it's usually easier to hire and fire workers than it is to significantly change a major production process or move to a new size of factory or office. In the short-run, one factor of production is fixed, e.g. capital. This means that if a firm wants to increase output, it could employ more workers, but not increase capital in the short-run (it takes time to expand.) Therefore in the short-run, we can get diminishing marginal returns, and marginal costs may start to increase quickly. Also, in the short-run, we can see prices and wages out of equilibrium, e.g. sudden rise in demand, may lead to higher prices, but firms don't have the capacity to respond and increase supply.

Tejvan Pettinger. (2015). Short-run, long-run, very long-run. Glossary Terms. Economics help blog. NY: Helping to Simplify Economic.
Retrieved from: http://www.economicshelp.org/blog/glossary/short-run-long-run-very-long-run/
Short-Run. Short-Run Definition | Investopedia
Retrieved from http://www.investopedia.com/terms/s/shortrun.asp#ixzz4KO1YXsri

I need a peer reply for this, please.

taupeswan96

PLEASE ANSWER ALL PARTS OF ALL QUESTIONS THOUROUGHLY (WILL GIVE GOOD RATING-THANKS)

A. Consider an entrepreneur who has decided to follow through on a business venture. He has quit his job where he was employed as a Medical Assistant earning $2,500 a month, and has decided to run this new business venture alone as the sole proprietor. He approaches a bank with his business idea and obtains a loan for the startup and purchases the equipment and machinery that he would need for the business including the purchase of a web address and design for his business, he also takes out a 2 year lease on a building and adjoining property, with paid utilities at an excellent location and contracts with suppliers to provide him with raw materials on a six month basis at discounted bulk purchase rates. His total fixed costs on a monthly basis for this venture, which includes his forgone earnings from his previous job, are $7,500.

He now needs to hire workers to operate the machines, handle orders etc. and he needs at least 5 workers to begin production. Having taking ECON 2020 while in college, he computes the total product function for his business, on a monthly basis, given the quantity of other resources he has, in the short run as follows:

Quantity of Labor (Number of workers)	Total Product (Output)
5	200
10	450
15	800
20	1100
25	1300
30	1400

1. First, assume no other information on the profitability of this venture, what is the implied 'profit' expected by the entrepreneur each month? Explain

2. Obtain the marginal physical product of this business, graph the function and provide an intuitive explanation for the shape of the function.

3. Now suppose each worker hired is paid $10/hr in wages and works 150 hours each month. Obtain the monthly total variable, total fixed and total cost functions for this business if it produces at the various output levels in the table above (i.e. fill out the table below, and show all necessary work below)

Output (Q)	Total Fixed Cost	Total Variable Cost	Total Cost
200
450
800
1100
1300
1400

4. The entrepreneur knows that his business is producing in an environment of perfect competition and as a result the market determined price after his entry into the business is $37.50 for each unit of the product that he sells. Determine the firm's monthly profit maximizing (or loss minimizing) output level , using the profit maximizing rule

5. From (4), is this firm making any excess (economic) profits in the short run? Explain. Compute the firm's monthly profits (or losses) at the profit maximizing output level

6. What should we expect to happen in the long run in this industry as a result of the correct answers given in part (5)? Explain.

blushcamel945

1-7 True or False

1) In the short run, a perfectly competitive firm can earn positive, zero, or negative profit depending on the market price of the firm's output.

2)In the model of the perfectly competitive firm, the firm's fixed costs are equal to its implicit costs of production.

3)Assume the market price is greater than average total cost at the perfectly competitive firm's profit-maximizing level of output. In this case, the firm is earning positive economic profits, which act as an incentive for new firms to enter the market.

4)Assume that at the current level of output, price equals marginal revenue, but is less than average total cost. So long as price is greater than average variable cost, the firm should continue to operate in the short run to minimize its losses.

5)The fact that a firm is a price-setter does not ensure it will make a positive economic profit in the short run and over time.

6)Barriers to entry serve to limit the number of firms that operate in a particular market and, as 11) such, reduce the amount of total profit earned in the market.

7)In the prisoner's dilemma game, each player's dominant strategy is also the Nash equilibrium.

14-17 Multiple Choice

14) Marginal revenue is equal to:
A) the change in P x Q due to a one unit change in output. B) the change in quantity divided by the change in price.

C) the change in price divided by the change in output. D) price, but only if the firm is a price searcher.

15) In order to maximize its profits, a price-taking firm should produce the level of output at which:

A) marginal revenue = marginal cost. B) total revenue = total cost.

C) variable revenue = variable cost. D) average revenue = average cost.

16) Assume that there is an improvement in the technology used by firms in a perfectly competitive industry that is initially in long-run equilibrium. In the short run this would cause:

A) cannot be determined with the information given. B) no change in the firm's economic profit.
C) a decrease in the firm's economic profit. D) an increase in the firm's economic profit.

17) Assume at the firm's profit-maximizing level of output P = AVC. In this case, the firm will be:

A) incurring an economic loss. B) earning a positive economic profit.

C) earning economic profit = 0. D) breaking even.

ECON 040 Lecture Notes - Lecture 11: Marginal Revenue, Sunk Costs, Marginal Cost

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