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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2answers
47 views

Bayesian Nash Equilibria: Strong and Weak Types

I need a little help with the question. I understand that since both players have two types each, there will be 4 different payoff matrices to be considered, $(S,S)$,$(S,W)$,$(W,S)$,$(W,W)$, each type ...
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239 views

eBay economics - total revenue impact from expanding ecosystem by 1 seller

While I think my question is straight forward, I'm guessing the answer to it is anything but. Thanks in advance for any insight you may be able to offer, even if it's just a directional assist. Here'...
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What changes do I, as an individual, experience during a recession?

There is a lot of talk about how we're approaching an economic recession. There is plenty of talk about how that would affect the world at large, but I haven't really found much on the level of ...
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Difficulty Understanding CPI (Consumer Price Index)

Here's a question about CPI in my microeconomics text (Pindyck), which I don't seem to understand: The price of computers has fallen substantially over the past two decades. Use this drop in price ...
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39 views

Trembling hand perfection and weakly dominated strategies

It is well known that players cannot use weakly dominated strategies in a trembling hand perfect equilibrium. My question, however, is a little different: does iterated deletion of weakly dominated ...
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Is expensive private school a rational investment?

In Australia, successive conservative Federal governments have increased the share of public funding for non-government schools, and for the top schools the amounts of annual funding are many millions ...
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81 views

Monopsony diagram curves

Why is the marginal cost curve not the same as the supply curve? My personal explanation is that since the marginal cost curve is cost of producing each new product, the supply curve just represents ...
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2answers
139 views

Why would minimum rent under franchise arrangements for McDonald's decrease year by year?

I am working on a project regarding the refranchising strategy of McDonald's and came across this piece of data in their 2014 annual report. My understanding of minimum rent is that its a fixed amount ...
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1answer
36 views

Opportunity Cost effect on benefits

My question is the following: Let's say a person has two career choices. He would be succesful in both, but in one of them he is slightly better and thus he will do better. So let's say career A will ...
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1answer
271 views

Perfect Bayesian Equilibria

What are the perfect Bayesian equilibria in the following game? The part that is confusing me is the right-hand side, where player 2 is of type N. Thanks! EDIT: My workings out so far are given ...
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utility maximization with nested Cobb–Douglas–CES preferences

I'm trying to understand the following paper: Hsieh & Ossa: A global view of productivity growth in China (2016). The pdf can be found here: https://faculty.chicagobooth.edu/chang-tai.hsieh/...
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Moral hazard, bubbles, and economies of scale in limited companies and organizations

http://eprints.lse.ac.uk/100058/1/Goodhart_CEPR_DP13494.pdf What would be the disadvantage of limiting the liability to the product of the proportion of the company and the debt(a person with 2% of a ...
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Is a proft tax not distorting unless we know the opportunity cost?

A Profit tax where we actually know the Entire Cost Function Including the Opportunity cost(Time, Incommodation, best alternative for the easily monetized resources etc) is not distorting. But the ...
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1answer
289 views

intertemporal utility maximisation

Adam's consumption period 1 and 2 are denoted by $c_1$ and $c_2$ respectively. His utility function is $U(c_1,c_2)=4c_1^{0.5} + c_2$ Ben earns an income of \$3 in period 1 and \$3 in period 2, ...
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1answer
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The notation cl co (A)

I stumbled upon this notation, (cl co(A+C), while reading "Set Optimization—A Rather Short Introduction" by Andreas H. Hamel, Frank Heyde, Andreas Löhne, Birgit Rudloff and Carola Schrage. Is it ...
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Cobb-Douglas production function with expenditures rather than units

I want to estimate a standard Cobb-Douglas production function of the form $ Y=AK^{\alpha}L^{\beta}$. However, I only have data on labour expenditures, not units of labour. I don't have data on the ...
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1answer
65 views

What is the difference between solving for utility maximization separately or aggregately?

I derived the Walrasian equilibrium for an economy of two consumers with their respective utility functions (u1, u2) and initial endowments but later on I am asked to maximize (u1+u2). Does anyone ...
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1answer
136 views

Do you get economies of scope from horizontal or vertical integration?

Economies of scope: make it cheaper to produce a range of products together than produce each one on its own as company can share inputs (e.g marketing and finance) removing cost redundancy Would ...
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247 views

How to calculate income and substitution effect when equal marginal principle is violated

I am trying to calculate substitution and income effect for 2 goods, x and y. Given that marginal utility x = 1, marginal utility y = -a (unknown number), price of x = 16, price of y = 20, how ...
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finding optimal values of quantities through utility function when MRS is 1 and price ratio is 1:2 [closed]

so this is a somewhat simple question but im stumped, here's why: given the utility U=2$X_1$+2$X_2$ where $P_1$$X_1$+$P_2$$X_2$=20 and $P_1$=0.5$P_2$ the question asks to find optimal values of $...
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2k views

Total cost function and (dis)economies of scale

I'm really confused about how I'd tackle this. I have an equation, $TC(Q) = 100Q + 20Q^2 + 3Q^3$. And I'm trying to find where the economies of scale, diseconomies of scale and constant return to ...
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If the government introduces import quota will prices change for imported goods

I am currently going through an introductory course to microeconomics. We are discussing how government interventions result in inefficiencies and dead-weight losses. One of the questions in concern ...
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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
36 views

Can a monopoly supply negative units to one of its two markets?

A question I have seen in my microeconomics textbook is as follows: Consider a monopoly supply to both a domestic and foreign market, where the market demands are: Yd(pd) = 20 - 2pd, hence pd(yd) = ...
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Perfect Substitution with a Continuum of goods?

Imagine I have a continuum of different goods indexed by $\omega \in [0,1]$. I have a household which consumes a quantity $C(\omega)$ of good $\omega$, and pays a price $P(\omega)$. The household has ...
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Representing preference orderings over a finite set of outcomes by two payoffs

I have read the following statement and I am having difficulty understanding the second part: Any set of preference orderings over a finite set of outcomes can be represented either by ...
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34 views

Calculating equilibrium in a cobb-douglas long run, perfect competition scenario

Supposed there are a fixed number of 1000 identical firms in a PC industry, with each producing the same fraction with the same production function $$q_{i} = \sqrt{K \cdot L}$$ And market demand is ...
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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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60 views

Contribution by each factor

Must admit it has been many years since I have done advanced calculations or anything remotely like it, so please bear with me. I have problem that I hope to get some help with. Say I have below ...
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2answers
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How to deal with misspecification of models in Macroeconomics?

I'm wondering what methods are used in economics, specially in macro, to deal with model misspecification. I've already searched the web, but I may be missing some methods. Therefore, I ask you for ...
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1answer
22 views

Market Clearing with Dividend and Investment

In pure exchange GE models, a typical goods market clearing condition for good $n$ looks like: $$\sum\limits_{i=1}^Ic_n^i=\sum\limits_{i=1}^Ie_n^i.$$ Consider a model with production where firms can ...
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57 views

Direct revelation mechanism's sets of strategies and types

Mas-Colell, Whinston and Green in Microeconomic Theory describe the direct revelation mechanism as it follows: The employed notation is the following: $θ_i$: Player i's type $Θ_i$: Set of types for ...
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If the (direct) utility is concave in all goods, is the indirect utility necessarily concave in wealth?

Suppose that the direct utility $u(x_1,...,x_n)$ is concave in each of its arguments. Does this imply that the indirect utility $U(w,p)$ is concave with respect to $w$? If all goods are normal than ...
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Are marginal utilities or utilities compared?

Consider decision making in an economic model. Suppose that there is some utility and it is a function of consumption and leisure where leisure is full-time work, part-time work, or full-time ...
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1answer
11 views

Difference between social choice function and mechanism outcome function

Mas-Colell, Whinston and Green's Microeconomic Theory (3rd edition) defines the social choice function as the following: Later, the mechanism outcome function is also defined: The relationship ...
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51 views

How does expected utility theory treat losses?

I've been reading about prospect theory lately and have read often that prospect theory predicts people will be risk averse in gains and risk seeking in losses. This statement is typically ...
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29 views

Index of an Excess Demand Vector

Mas-Colell, Whinston and Green, in Microeconomic Theory (third edition), postulate the concept of an index for an excess demand vector, which is later used in the Index Theorem: A regular equilibrium ...
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What is the trade-off between? Consumption and Leisure or Income and Leisure?

When first presenting the utility function and its arguments, textbooks typically start by stating that utility is a function of consumption and leisure. See for example https://sites.hks.harvard.edu/...
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Conditions for Radner Equilibrium

This is definition of Radner Equilibrium from Microeconomic Theory (Mas-Collel, Whinston and Green - Third Edition). I'm confused about two conditions: $\sum_k q_k \cdot z_{ki} \le 0$ (in yellow) ...
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1answer
58 views

Everyone has the same marginal rate of substitution

I'm currently reading Varian's Intermediate Microeconomics and what struck me, is this statement on page 89 of the 8th edition. If everyone faces the same prices for the two goods, then everyone ...
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Equilibrium price determination in a 2 commodity framework

Following are the set of equations describing the demand and supply of two goods X and Y: Demand functions: $$X_d = a_1 - b_1P_x + c_1P_y$$ $$Y_d = a_2 - b_2P_y +c_2P_x$$ $a_1,~ a_2,~ b_1,~ b_2,~ ...
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41 views

Have I found the correct Emission Price

Let's say that there is a hotel owner $(H)$ and a woodworker $(W)$ working in close proximity to one another. The woodworker produces $x$ units to sell at market at $p_{x}=6,5$. From the woodworking ...
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1answer
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Transforming an indirect utility function into an expenditure function

in preparation for our upcoming exam, our tutor has uploaded sample questions. One of them is the following: This is my solution: Which differs from the solution, which gives the ordinary square ...
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Signalling Model (How to solve a differential equation?)

I'm currently reading "SAVING RATES AND POVERTY: THE ROLE OF CONSPICUOUS CONSUMPTION AND HUMAN CAPITAL" by Omer Moav and Zvika Neeman, and I encounter some problem deriving one of the equations. ...
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Are there examples of Cost Benefit Analysis using diminishing marginal utility of income?

In Cost Benefit Analysis (CBA) constant Marginal Utility of Income (MUI) is usually assumed. This implies that a dollar received/earned is the same at low and high levels of income. In Social CBA, ...
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Monthly price elasticity and possibility of using daily values

I am calculating the price elasticity as a starting point to find a theoretical optimal price that would maximize our revenue. I am looking at 2 years data and to use the price elasticity formula, I ...
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What are some applications of Real Analysis in Graduate Economics?

I am interested as to what areas of masters/PhD coursework that learning the fundamentals of Real Analysis would be beneficial for? I am aware of its applications in Econometrics proofs and analysis, ...
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Effect of a change in quality on price elasticity of demand

I am interested to know how one would expect a change in the quality of a product to affect its price elasticity of demand. Two example will illustrate my confusion: Example 1 Suppose a producer is ...
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1answer
34 views

Change in the marginal utility of leisure with respect to a change in consumption

I am reading a paper that derives a theoretical retirement model. There is a utility function and a budget constraint forming an optimal control problem. The solution to this problem states that \...
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1answer
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Value Function For Durable-Good Monopolist with General Distribution

It is known that with a unit mass of consumers, each of whom has a value distributed between 0 and 1, one can think of the monopolist solving \begin{equation} \max_{p} \ p[1-F(p)] \end{equation} when ...