# Questions tagged [marginal]

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### Marginal Utility Problem

The local mall has a make-your-own sundae shop. They charge customers 35 cents for each fresh fruit topping and 25 cents for each processed topping. Barbara is going to make herself a sundae. The ...
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### Link between supply elasticity and marginal costs

I have two substitute materials (A and B) to produce a product, and I want to know the relationship between their marginal costs and the elasticity of supply of the product. Graphically I notice that ...
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### Is it relevant to compute total and marginal cost over time?

I have several time series with the production and prices of commodities (aluminum and copper) that I want to study from an economic point of view. I'd like to compute total and marginal costs over ...
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### For the cost function question (equation in image), I have found TVC as AVC*P. However the MC curve derived is giving imaginary number solution

For the cost function question (equation in image), I have found TVC as AVC*P. However MC curve is showing an imaginary number as solution.
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### Does marginal revenue actually refer to marginal revenue per time unit?

When I was learning about why marginal revenue is lower than demand, I referred to this derivation: $$\frac{d(TR)}{dQ} = \frac{d(PQ)}{dQ} = \frac{PdQ + QdP}{dQ} = P + Q\frac{dP}{dQ}$$ Wikipedia ...
1 vote
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### Mathematical explanation of transformations of Marginal Revenue

MR = d(Total revenue)/dQuantity = d (Price * Quantity)/dQuanitity This is the same as this : MR = P(Q) + dP/dQ I did it with an example and it amazed me how both are equal but I still dont get how. ...
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### How does marginal utility and marginal product differ?

The marginal utility is, in plain English, the additional benefit (utility) that an individual gets by consuming an additional unit of a good or service. According to the Law of Diminishing Marginal ...
1 vote
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### Perfect substitutes mathematical definitions not equivalent

Statement: Consider goods $X$ and $Y$ (and we denote the quantities of by the same notation) such that they are perfect substitutes with the substitution ratio $1:n$. Assume the basic axioms ...
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### What's the difference between fixed and variable O&M costs in power generation

Not sure what the difference is btwn Fixed and variable O&M costs. As you can see in this screenshot, both contain maintenance cost. While fixed o&m contains regular and irregular maintenance ...
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### Utility Function Challenge

A utility function is given for two goods Good 1 and Good 2 $$U=f({G_1},{G_2})=45{{G_1}^{0.7}}{{G_2}^{0.3}}$$ Did I get this right? the marginal utility functions with respect to G1 and G2 will be ...
42 views

### Relationship between capital and decreasing marginal prodcutivity

In Capital by Thomas Piketty ( chapter The capital - labor spit in the twenty first century - page 271) we have below quote The evolution of the rate of return on capita, r, significantly reduces the ...
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### Is addiction a case of increasing marginal utility?

I got to know that alcohol addiction is a case of increasing marginal utility. My professor refutes me bluntly stating that once a person starts consuming he no longer remains to be a 'rational ...
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### Is it possible to absorb the cost of advertising into the production cost for information goods in situations where attention is scarce?

This is a question about the economics of information goods on the Web. Let's say that there is an information good that is sold on the Web, that can be produced at some cost of production D, using ...
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1 vote
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### Does a depreciation in the Dollar lead to a reduction in the US' marginal propensity to import?

Does a depreciation in the Dollar lead to a reduction in the US' marginal propensity to import? I thought it would because a weaker dollar makes imports more expensive, so consumers spend less of ...
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1 vote
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### What would be the income tax rate be if it were 'flattened'?

In some recent conversations/speeches (It's voting season), I have noticed many people do not understand how a marginal income tax system works. Not understanding how they are only taxed at the ...
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1 vote
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### Is marginal cost different from extra cost?

I have been reading this resource which talks about why derivatives can be used to find the marginal cost. https://www.dummies.com/education/math/calculus/how-to-determine-marginal-cost-marginal-...
1 vote
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### Why can utility functions be continuous, and what does this imply for marginal utility?

I am studying microeconomics at the introductory undergraduate level and two related but distinct questions are puzzling me. First, my textbooks express utility functions as continuous functions by ...
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### Why does marginal cost slope upwards after the minimum point?

My textbook writes this on marginal cost: "The law of diminishing returns refers to the idea that as more of a factor (input) is used, with at least one fixed factor, there is some point at which the ...
764 views

### Why is the marginal utility of money assumed to be constant in Marshallian Theory of Consumer Behaviour

While studying the Marshallian Theory of Consumer Behaviour, I came across the assumption that the marginal utility of money is assumed to be constant. Can someone please explain why is this so?
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### Why are marginal rates of substitution are identical at equilibrium consumption levels?

According to wikipedia, "At equilibrium consumption levels (assuming no externalities), marginal rates of substitution are identical". Why is it so? What does "equilibrium consumption levels" here ...
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1 vote
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### A question about the property of quasi-linear preference

In case of quasi-linear preference, why would one unit more of the numeraire good (good 1) give the same additional utility as spending an additional amount of wealth equal to the cost of one unit of ...
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### Production function involving profit maximisation

​Hi, I don't get how the answer of d is deduced in this question because I don't think I made any mistakes in my calculation and have also used all the information given. After knowing L is 800, I ...
333 views

### MRTS question involving production function [closed]

My work out shows constant MRTS and also increasing returns to scale. I thought the answer was C as I only found increasing marginal products of labour and capital. I really don't see how the answer ...
1 vote
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### In the real world, how does a firm know their marginal costs and revenue? How do they mathematically calculate MC=MR?

I understand the theory behind it but in practice how is this done?
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### Marginal Cost Calculation issue

I calculated the Marginal cost for the below question. But it seems the results are wrong After coming up with an innovative idea for a new product, you paid 4000 to an industrial designer to draw ...
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### fixed an marginal cost calculation issue

I'm trying to solve a question that is quite difficult for me. I did part of the question but, bit difficult to decide the exact answer for the below question. After coming up with an innovative ...
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