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Questions tagged [cost]

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Are these papers correctly identified by the economic evaluation?

Cost Benefit Analysis https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1767465/ https://www.thecommunityguide.org/sites/default/files/assets/massmedia_AJPM1.pdf Cost Effectiveness Analysis https://...
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1answer
16 views

Can implicit costs be negative?

I think that conventionally implicit costs are positive but if for example we consider a negative interest rate as an implicit cost, the implicit cost would be negative. Is this true? Can implicit ...
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2answers
40 views

In perfect competition, why is there economic loss if marginal cost > marginal revenue?

Here's a graph for reference: In the left graph, I read from a book (CFA L1 notes) that At any output above the quantity where $MR = MC$, the firm will be generating losses on its marginal ...
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Vertical Marginal Cost curves

When would a marginal cost curve be vertical? I understand this happens when the marginal cost jumps, from say 0 to 100, but in such a case, I think there should be a discontinuity rather than a ...
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1answer
63 views

Decision over “max” production function:

I've been presented with the following problem: $$y=3(x_3)^{\frac13}(\max\{x_1,8x_2\})^{\frac13}$$ And the objective is to both maximize profit and minimize cost. First of all, if the problems are ...
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Demand Function

In cost and demand problems, why is the equation for price per unit named the demand function, as shown in the examples below? Also, why is it equal to a constant minus some multiple of the number of ...
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0answers
28 views

Excessive entry without fixed costs

Mankiw & Whinston (1986) show that the market may contain too many firms. The intuition is that if a firm charges a suboptimal high price, a rival has a demand curve that is "too high" and can ...
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22 views

User Cost of Capital Calculation

I have an exam revision question that goes like this: Assume that current rates on safe investments equal to $5\%$, mortgage interest rates equal to $6\%$, houses last $100$ years on average and ...
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1answer
31 views

EOQ - how to calculate holding cost

This is very simple, however, I have the following setup Suppose that the company ABC has a product that shows a constant annual demand rate of 3600 items. One item costs £3. Ordering cost is £20 per ...
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2answers
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Why don't public transport networks have more routes to each terminal in order to reduce the number of transfers?

When using public transport, we often need to transfer to a different route during of the journey. These transfers have costs – I can think of the following, but there may be more. If we're reading, ...
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2answers
57 views

How does the EBQ formular come out?

I figured out how the economic order quantity (EOQ) formula comes out. I know it is quite similar with economic batch quantity (EBQ), sometimes termed economic production quantity (EPQ). I just don't ...
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4answers
127 views

How to track costs and calculate price?

I run a large Massively Multiplayer Online (MMO) gaming community and one of the services we’ve try to provide to our members is crafting. One of the challenges of this has been determining the price ...
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1answer
177 views

Does Average Total Cost (ATC) include implicit opportunity costs?

Does the average total cost include opportunity costs? If so, are these opportunity costs considered fixed costs or variable costs? How are they calculated.
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2answers
39 views

Is there a cost to running the NewYork Stock Exchange? Does it affect the price of stocks sold on the exchange?

Is there a cost to running the New York Stock Exchange? For example electricity costs, management costs, rents on the building(s). How do these costs (if any) affect the price of stocks sold on the ...
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1answer
201 views

Why is railway electrification in North America far less common than in Europe?

Why is railway electrification in North America far less common than in Europe? I suspect that the answer has something to do with the economics of electrification. In Europe, railway ...
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0answers
78 views

Question on an argument in “The Myth of Absolute Advantage”

Brandis (1967) argues that "absolute advantage does not exist" and "that it is a logical impossibility". (See also comment, comment, reply.) My question here is very narrow and specific. I do not ...
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2answers
2k views

Understanding the shape of a Marginal Cost Curve

My class IB has just discussed allocative efficiency and hence consumer and producer supply. They explained the concepts with a diagram like this: It all made perfect sense to me until it was ...
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3answers
797 views

Is it possible to have constant marginal cost and decreasing average cost simultaneously? [closed]

I thought about possibility of occurring such event in the case of presence of fixed costs, but I would like to know others opinions.
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2answers
460 views

Proof that for increasing AC MC(Q)>AC(Q) at any Q>0? [closed]

I know the "common sense" proof, but how can we prove it algebraically?
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0answers
163 views

Monopoly marginal cost [closed]

I have recently been stumped on a microeconomics question where it gives a monopoly firm, its operating ATC (average total cost), price (average revenue), and quantity traded. First thing it wants me ...
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1answer
88 views

How to Graph Short-Run Average Cost?

I've learnt to roughly draw graphs of various functions like isoquants of Cobb Douglas function, i.e., $k=√q/L$. Here first derivative is negative so it's downward sloping and second derivative is ...
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1answer
260 views

Are all points on the Long Run Average Cost (LRAC) curve productively efficient?

The definition of productive efficiency is that any given output is produced for the lowest possible cost. In the short run, only the minimum point on the SRAC curve is productively efficient - this ...
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3answers
80 views

How do I calculate the cost per usage of a machine?

If you buy a machine for 10.000 dollars, which costs as a yearly write-off 2000 dollars, how do I calculate the cost per usage of a machine? Do you just divide the the yearly write-off by the times ...
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Marginal cost slope segments

I have been trying to solve the following question I found during an exam I had, but so far could not find a definitive answer. According to the theory of costs, is it possible for a marginal cost ...
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1answer
1k views

Why is ATC tangent to Demand in a Monopolistic or Mopolistically Competitive Firm Making Zero Profit?

I understand that the Average Total Cost is equivalent to demand in a zero profiting monopoly or monopolistically competitive firm in order for there to be zero profits (when ATC = P at a given ...
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1answer
548 views

Optimal production level for a typical firm in long-run

Assuming all firms have identical cost functions. Now suppose there is an increasing shift in the demand curve. As we all know that for increasing costs case, both average costs (AC) and marginal ...
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1answer
387 views

Derivation long run cost function of three inputs with Leontief-like characteristics

Suppose that a firm produces a good using capital, skilled labor, and unskilled labor. Let $K$ denote the amount of capital,$L_1$ unskilled labor, $L_2$ skilled labor. The production function is $f(...
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1answer
3k views

Why is the short run average cost curve not a tangent to the long run average cost curve at the lowest point on the short run average cost curve?

The diagram from the Varian textbook shows that the SRAC curve is tangent to the LRAC curve at a point which is not the bottom of the SRAC curve. It would be really helpful if someone could explain ...
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1answer
6k views

Can one Calculate Fixed and Variable Cost From TC and Quantity Alone?

I have been asked a question and believe there is a mistake in the problem. I have been given a table of values, Quantity and corresponding Total cost. From those numbers I can easily calculate the ...
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0answers
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Where to start, to know the cost, in hours of work, necessary to produce one more car (or any other good)?

Let's say I want to buy a car. It costs that, so I can know that, for example, I have to work 3 months to pay for it. But does the car really needs three months of human work to be build? What is the ...
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1answer
284 views

Is there any difference between using LRAC and LRATC in a long-run market structure diagram?

I am currently being taught to use average total cost (ATC) to label the U-shaped curve in the short-run on a market structure diagram, and long-run average cost (LRAC) for the equivalent curve in a ...
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0answers
43 views

Find change in gross profit after price change

How do you solve this question? A company has 3 products. They contribute to 30%, 30% and 40% of sales respectively. They have profit margins of 15%, 30%, and 50% respectively. If the ...
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2answers
92 views

What would make a restaurant offer all-day breakfast?

Some restaurants particularly fast food ones offer breakfast food only during, well, breakfast hours. Other restaurants however offer breakfast food throughout their opening hours. Some restaurants ...
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1answer
40 views

Producer's cost for buying full solution vs. buying parts

This may be a very basic question. From a producer's standpoint, what are the theoretical or empirical results on the comparison of cost between buying assembled or full solutions from suppliers vs. ...
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What is the difference between the discrete choice method and the generalised cost method in transport planning?

I have been using the generalised cost method in an agent based model. The generalised cost method enables each individual agent to make a decision on what mode of transport it will take given a range ...
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1answer
370 views

How to determine the marginal product for the following question? [closed]

Suppose that a firm has a Fixed cost of 10,000 dollars and Total Cost of 10,500 dollars for one unit and 11,100 dollars for two units of output. Which of the following is true for the Marginal Cost (...
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1answer
3k views

Proving AC is minimized when MC=AC

I am trying to prove that AC is mininimized when AC=MC This is how far I am: FOC: Showing what I want to prove SOC: This has to be positive in order to ensure that AC is minimized, but how can i ...
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1answer
32 views

How to define best value?

I'm trying to define which hotel offers the best value. Let's say we have two hotels - A and B. For A, you pay $10 a night and the rating for the hotel is 9.8. For B, you pay $8 a night and the ...
2
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1answer
38 views

Estimating the cost of an assett that needs to be replenished [closed]

I am working with hard drives. For simplicity, let's say all drives have the same capacity, 1TB and all cost $100. They typically last about 4 years, when they need to be replaced. They drop in ...
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2answers
61 views

The marginal cost function is meaningful only when the produced quantity is normalized

The cost function depends on the number of produced items. Let the value of the cost function C be in hundreds of thousands $ and the quantity is in 1,000,000 items, thus q = 1 indicates 1,000,000 ...
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5answers
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Why don't Burgers cost 5 cents?

In this blog post, economist Bob Murphy raises a puzzle involving the principle that in a competitive market, the price equals the marginal cost: There’s a general principle from intro to ...
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1answer
44 views

Manufacturing economics book?

I am interested in manufacturing economics - suppose I have to built an engine, I would like to learn a systematic approach to break down what the costs of building an engine would be and how I could ...
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1answer
87 views

Is the following graph possible?

Is the following graph possible? I've attempted to sketch the TC/TR curves for it but they don't seem to be able to satisfy the following two properties at the same time: 1) Slope of Total Cost (TC) ...
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2answers
1k views

Optimize by MR = MC vs TR = TC

I know that I should optimize production by solving $MR = MC$ with respect to $Q$. But if $TR > TC$, I am making a profit. Why is not enough to just solve $TR = TC$ with respect to $Q$?
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What is the difference between marginal cost and average cost? [duplicate]

Marginal Cost is $$MC(y) = \frac{\partial C(y)}{ \partial y}$$ Average Cost is $$AC(y) = \frac{ C(y)}{ y}$$ Average Variable Cost is $$AVC(y) = \frac{VC(y)}{ y}$$ Note: Cost is $$ C(y) = FC + VC(...
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4answers
619 views

Should Costs of Travel to Buy Goods be Regarded as Transaction Costs?

Within the approach of New Institutional Economics associated with Oliver Williamson and others, emphasis is placed on transaction costs as a key factor in explaining why different forms of economic ...
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0answers
437 views

Short Run vs Long Run Cost Functions

Let $z_a$ and $z_b$ are two vectors of inputs. $z_a$ is variable in both long run and short run however $z_b$ is only variable in long run. Now let's suppose that the price of one of the inputs in ...
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252 views

Curvature of Cost and Production Function

I have been trying to understand the duality theory between cost and production function. Please let me know if my following statement is correct; If the cost function $C(w,q)$ is convex in $q$, the ...
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1answer
81 views

Homothetic Production Technologies

Can someone suggest a good resource on homothetic technologies and what properties they imply about cost function, profit function, input demands, output supply etc? Also is it possible to have ...
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27 views

Total costs as function of labor and quantity [closed]

If I have wage $w = 200$ and rental rate $r = 3050$ on short run, I can assume that $K=1$ and then get the total costs $TC = rK+wL = 3050 + 200L$. Isn't it correct? But what if I also have a cost of ...