Questions tagged [microeconomics]

Microeconomics is a branch of economics that studies the market behavior of individual actors (usually firms and consumers) and the aggregation of their actions in different institutional frameworks (usually the market).

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90 views

Cobb Douglas, Budget Line, Demand function question

use the general form of the Cobb Douglas utility function $U(x,y)= (x^a)(y^b)$ and the budget constraint in the form $B=p_{x}X + p_{y}Y$ to find the demand functions for good x and good y. Is this ...
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1answer
23 views

Production technology of $y=2x$

I have a given product $y$ that is produced by the input $x$ in the following relation: $2x=y$. In our example, we are given the unit price of $x$ is $16$. Find the unit cost of $y$. The answer is $8$....
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1answer
28 views

Price discrimination question

For this question the answer is b which is the TR of group 2. If price is the same, my question is why isn't the demand function of group 1 considered? Why is the TR of group 1 omitted?
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2answers
76 views

SMD and Lucas critique

One of the consequences of Lucas' critique is that models must be microfounded. On the other side, Sonnenschein-Mantel-Debreu (SMD) theorem claims that microfoundation doesn't have any repercussion on ...
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1answer
55 views

Is truth cheap, and falsehood expensive and volatile? [closed]

Question: In a scenario where data is bought and sold in a double-auction market, will the trading price and volatility of a given piece of data become inversely proportional to its accuracy over ...
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1answer
31 views

Minimum wage divided by cost of living?

Is there some commonly known indicator that is defined as: Minimum wage divided by cost of living? I mean, I could call it that way, but perhaps people already have this indicator with a certain ...
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1answer
238 views

Command and control policy approach graph

I'm unsure why a command and control policy approach to pollution will still have a dead weight loss? What happens with it/ or what does the government do about it if anything?
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1answer
311 views

Question on oligopoly.

Consider an oligopoly between two identical firms producing a homogenous good with constant marginal cost where firms face linear market demand. $B_i(q_j)$ denotes firm i’s best response given the ...
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1answer
298 views

price floor and price ceiling

I am studying basics of economics. I don't understand why a maximum price should be set below equilibrium price and minimum should be above. shouldn't it be the other way round?
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2answers
4k views

How do you determine if the production function has decreasing returns to scale?

How do you determine this for the production function $f(k,l) = k^{1.4}l^{0.5}$ ? So far, I have found the marginal product of both labour and capital however, the marginal product of labour is ...
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1answer
45 views

What is the maximal theoretically possible wage increase here and now (ceteris paribus)? [closed]

Labour unions are pushing for wage increase but what is maximal theoretically possible wage increase here and now - without restructuring production, processes and without introduction of new ...
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2answers
305 views

Budget constraint with leisure and consumption

I am given the following utility function: $u(x_{1}, x_{2})=x_{1}^2x_{2}$ where $x_{1}$ represents leisure and $x_{2}$ represents consumption. I am also given the budget constraint with the price of ...
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1answer
139 views

Does the utility function U(X, Y) = 12x^0.2 y^0.8 represent homothetic preferences? [closed]

Does the utility function U(X, Y) = 12x^0.2 y^0.8 represent homothetic preferences? I was given this question but I have no idea how to work it out. I understand what homothetic preferences are in ...
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1answer
524 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
42 views

Maximization when parameters are unknown

I would like to know if my understanding about how to find a maximum of the function when some parameters are unknown is correct. Consider the following maximization problem. $\max_{x}V=\int_0^{a(x)}...
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3answers
81 views

Why is demand curve always going down?

In many economic charts with demand and supply curve, people often say the demand curve goes down with more quantity. But I will give you a really practical example, why I think they are wrong. ...
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2answers
182 views

Proof that the budget set is closed [closed]

Mas-Colell, Whinston and Green's Microeconomic Theory affirms the budget set is closed. I would like to know why. The definition of open set in the book is the following:
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1answer
55 views

How does social cost and social benefit work?

I am really lost right now. I have a test tomorrow and I am stressing out. Whatever I look at for externalities, which could be my textbook, a website, notes from class, they all contradict each other....
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1answer
25 views

Am i correct here? #greenTaxes #priceMechanism #inefficientTax #DeadweightLoss [closed]

Now accoring to this article: https://www.telegraph.co.uk/news/2016/07/30/britain-banishes-plastic-bags-as-5p-tax-sees-usage-plummet-by-6/?fbclid=...
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1answer
154 views

How do I find optimal price or maximise profit in a monopolistic market?

How do I find the optimal price for a monopolist given the monopolist's cost function and market demand? I have $Profit(y) = p*y + C(y)$ where $p$ is price, $y$ is output, and $C(y)$ is total cost. ...
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1answer
1k views

Find optimal price from demand function?

I've been struggling with this for hours, trying to figure out how to solve this. "A perfectly competitive market has the marginal cost function, c (cost is C(y)=cy) and is facing the demand function:...
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1answer
547 views

Expenditure minimization with Leontief utility

I need to solve the expenditure minimization in a context where $u(x,y) = min\{x,y\}$, i.e. where utility is Leontief. The minimization problem is $$\text{min}_{x,y}\,\,p_xx+p_yy \\ \text{subject}\,...
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1answer
369 views

Profit maximization and allocative efficiency result

I completely stuck to the last part of this exercise. I cannot understand how can I determine an allocative efficiency result. Any help will be appreciated. Thank you.
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1answer
135 views

Sustainable growth in the long run [closed]

Suppose that, in addition to physical capital and labour, an economy requires a fixed factor and a non-renewable resource to produce the final good. Prove that an economy with these input requirements ...
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1answer
39 views

Cross elasticity of demand [closed]

If Q1=(P2)⅔ 1. Determine the demand for good 1, when the price of good 2 is 8 2. Find the cross elasticity of demand for good 1, with respect to P2, when P2=2
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1answer
52 views

Random Draft Allocation: Nash Equilibrium? [closed]

I would like to find the Nash equilibrium of the following allocation problem. There are 3 courses and 3 students. Each student has to take 2 courses, and each course has a capacity of 2 seats. ...
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1answer
73 views

Microeconomic Q on Total Revenue for Producer after Excise Tax [closed]

I had a question on how an excise tax per unit of good produced for a producer would affect total revenue for a producer of that good. The graph is that supply is perfectly elastic (horizontal) and ...
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1answer
105 views

Budget constraint when one of the goods can be sold

I'm studying for a microeconomics midterm and ran across the following question: A person consumes two goods, X and Y. The consumer's only source of income is given by the quantity of Y equal to ten,...
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1answer
991 views

Profit maximisation and cost minimization [closed]

Does profit maximisation always imply cost minimisation ? And Does cost minimization always imply profit maximisation ? Can we prove both the results ??
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1answer
143 views

Utility Maximization [closed]

Assume the utility function is $u(x,y,z)=y*min[x,z]$. The prices of all three goods are equal. The agent has an amount $M$ to spend on the goods. He has to choose one of the following schemes: A) Get ...
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1answer
371 views

What consumer preferences exhaust the budget?

Suppose that a consumer has a complete and transitive preference relation over R+. Further suppose that the consumer faces prices p = (p1,p2,...,p) 0 and has ...
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1answer
1k views

Slutsky and Hicks approach in calculating SE, IE. Differences and interpretation [closed]

Level: Ungrad, Micro I have a task, http://imgur.com/a/JT4zB I have done some questions. While I can't understand the differences between Slutsky and Hicks approach. I get it theoreticaly, but I don'...
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1answer
234 views

Consumer Theory (Finding demand function) [closed]

Here's the question that I really need help with: $$U(x,y)=(x^{0.5})+y$$ $MUx=\frac{1}{2x^{0.5}}$ and $MUy=1$, where $x$ is food, $y$ is clothing $Px$ is the price of food, $Py$ is the price of ...
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1answer
1k views

Estimate total variable cost function (TVC) and average variable cost function (AVP) from marginal cost function (MC)

I need to estimate the function expressions for $TVC$ and $AVC$ from the $MC$ function for different amounts of quantity $(Q)$ From the solutions I have, that For $Q \leq 50$ $MC1(Q) = -Q + 100$ $...
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1answer
94 views

Proving government expenditure crowds out private consumption [closed]

Please help as I am not able to solve either parts.
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0answers
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Risk aversion problem where the first derivative of utility function is negative [closed]

In this problem, the utility function's first derivative is negative and 2nd derivative is positive. I don't know how to answer. Please help! I know the answer of (b). I need help with (a) only.
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1answer
42 views

Why do some phones depreciate faster than other?

Based on evidence from reselling sites (eBay, Amazon etc.) we can observe a trend that iPhones on average depreciate far less and slower than for example Samsungs (or other phones that lose their ...
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1answer
54 views

A preference relation $\succ$ is defined as $(x_1,y_1)\succ (x_2,y_2)$ if $x_1>x_2$ and $y_1> y_2$

Does this satisfy completeness property? I need an intuitive explanation of this preference relation as well. I am confused about the way how this relation is defined. The commodity Y in the first ...
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1answer
59 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 ...
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1answer
25 views

Which of the following firms can operate in a perfectly competitive industry? [closed]

This was a question in a test. I am looking for an explanation for the answer. Firm A's cost of producing output y > 0 is c(y) = 1 + y Firm B's cost of producing output y is c(y) = y(1-y)^2 Answer: ...
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2answers
54 views

What's the market equilibrium price for the used good?

On a perfectly competitive market, a buyer wants to buy a used good. He is willing to pay $30$ for a badly used good, and $60$ for a nicely used good. The seller is willing to sell a badly used good ...
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1answer
315 views

Marginal rate of substitution(yx) question

For utility function U= ln(x)+Y How do I determine if MRS(yx) is diminishing or not for this question? I got Mu(x)=1/x and Mu(y)= 1 MRS(yx)=Mu(y)/Mu(x)= 1/1/x = x Does this mean that MRS(yx) is ...
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1answer
33 views

Imperfect Price Discrimination profit per group

During imperfect price discrimination is it possible to determine profit per group. For example: Aggregated Cost function: C(Q) = 18*Q + 5; where Q = q1 + q2 Aggregated Demand (AD) for group 1: q1(...
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1answer
60 views

Anti Piketty Confusing Movement Along Demand Curve with Shift

In Anti-Piketty, the author's claim that the statement "If the supply of any good is insufficient and it's price is too high, then demand for that good should decrease which should lead to a decline ...
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1answer
185 views

Pareto-optimal allocations in the Edgeworth box

If agent A has utility function $u(x_1, x_2)$ and agent B has utility function $v(x_1, x_2)$, what are the equation(s) that characterize the Pareto-efficient allocation of goods in the Edgeworth box? ...
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1answer
2k views

Inferior and normal good and the change in price of those goods

In general, We know that if a good is normal, then as your income increases, then demand of that good increases as well as price is fixed. Similarly, if a good is inferior, then as your income ...
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1answer
37 views

Will a consumer be more, or less willing to give up a commodity (for the other) for which they have been substituting another? [closed]

Statement: "Indifference curve analysis is based on the assumption of diminishing marginal rate of substitutiins. This means that as the consumer substitutes more and more of one commodity (say X) for ...
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2answers
60 views

How much of an assets price change is due to speculators and functional buys/sellers

If (for example) a heavily traded asset like crude oil has a price move of x, how much of that is influenced by functional buyers/sellers and how much by speculators? Let's say x is +100, there are 8 ...
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1answer
49 views

Finding out an optional consumption without calculation [closed]

I need help with this task. The utility function is U(a;b)=3a+2b. The prices for the goods a and b are equal. Explain what an optional consumption of the consumer would be without calculating. ...
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1answer
410 views

What is optimal profit for this company? [closed]

I am really struggling with the following question: Question: A company produces a product that they sell in two different countries. Because of transport costs, customs etc. it is not profitable ...