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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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Are there multiple equilibria in the second price auction?

Suppose that $n\geq 2$ bidders compete in a second price auction. Each bidder $i$ knows their own valuation $v_i$, but only knows the distribution generating the valuations of the other players. ...
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Drawing Leontief Isoquant [on hold]

Hi all Can someone help me? Please TIA. TRUE OR FALSE. WHY? or any clue A company has the production function 𝑓(𝑥,𝑦)=𝑚𝑖𝑛{2𝑥,𝑥+𝑦} and another company the function 𝑓(𝑥,𝑦)=𝑥+𝑚𝑖𝑛{𝑥,𝑦}....
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homework microeconomics [on hold]

A business graduate worked several years at a Lebanese bank for an annual salary of \$12,000. After saving \$20,000, she decided to open a consulting office for financial advice and services (as a ...
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Hiskisan approach . Graphical method [on hold]

What is weak inferior goids.in weak inferior if price increase what is effect of relative price, and demand.
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Derive the equation of the isoquant

I'm given production function: 𝑄 = 𝐿𝐾. Price of labor 𝑤 = 5 and the price of capital 𝑟 = 20. What are the steps to deriving the isoquant of this function? I thought that we would need Q to be ...
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2answers
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Finding Optimal Bundle and Change in Satisfaction after Changes in Budget Constraint

I am looking at the following exercise and struggling with the solution proposed by my microeconomics book. A consumer spends all his income on two goods, X and Y. The prices he paid and the ...
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Finding long run equilibrium price, quantity and number of firms with a linear average cost function

I've been been brushing up on my micoreocnomics lately and I came across a question in Perloff that looked really simple, but for some reason I am struggling to answer: Assume we are in the long run ...
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Deriving demand function from utility function

How do I derive the demand function from U=y + 2√x Currently I have, MRS = 1/√x = Px/Py, so, Py = Px√x Using the budget line: I= XPx + YPy, I = XPx +Y(Px√x) Which simplifies to X = (2I+Y^2Px +/- y√...
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Two-person household labor supply

The most basic model of labor supply is $$\max U(c,l) \\\text{s.t. } c=wh \\l+h=T$$ which leads to the solution $MRS_{c,l}=w$. How would we solve this problem if we had a two-person household: $$\max ...
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1answer
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Dominant Firm and Identical Competitive Firms

An industry consists of a dominant firm with C(Qd) = 32Q_d+Q_d^2 and 8 identical competitive firms with costs C(q) = 70...
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Deriving the INADA conditions for CES production function

Suppose that we have a CES production in intensive form with the following marginal productivity for capital: $$MP_{K}=\alpha A^{\beta }\left (\frac{y}{k} \right )^{1-\beta }$$ As we know, the CES ...
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Shopping example in Kőszegi / Rabin (2006)

In "Section IV Shopping" of Kőszegi / Rabin (A model of reference-dependent preferences, QJE 2006), the example of consumer buying a pair of shoes is given. They claim that "her disutility from ...
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1answer
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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
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How to Calculate Price Elasticity of Demand When Perfectly Elastic?

When we have perfect elasticity, the demand curve is a horizontal line and the elasticity of demand coefficient is equal to infinity. How do we arrive at a solution equal to infinity? We know that ...
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Gilt edged securities with lottery prizes worth billions of dollars and other international currencies [closed]

CAN more and more gilt edged securities coupled with many Australian lottery prizes worth many billions of dollars and other foreign currencies equal tradings of international traders?I have no ...
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1answer
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Profit maximizing, Quantity and Price with Dominant Firm and Competitive Fringe

A dominant firm operates in various markets. In one of these markets, it is a monopolist and produces with the following cost function: C(q1) = 5q1. The market demand is P = 1005 - Q. (a) Find the ...
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1answer
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Marginal Revenue Interpretation of Auctions

I'm reading Klemperer's survey on auction theory (pages 17-18) which discusses the relation between traditional microeconomic price theory and the revenue equivalence result. Firstly, I don't quite ...
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1answer
92 views

Utility maximimization for unusual Leontief utility function

The problem is basic utility maximization subject to a budget constraint with $$u(x,y) = min\{x+y,4\sqrt{x},4\sqrt{y}\}$$ $$p_x = 1, p_y = 1, M = 4$$ I will have to first plot the Indifference ...
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1answer
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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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How Does Production Possibility Curve Shift (Partially)?

Textbook: "Suppose that a new pizza assembly line improves the pizza production process and that the development of the new assembly line does not require the use of more of society's resources. ...
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1answer
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Changing Constant Factor Demands

I’ve been given this true false question: Consider the minimization of wL + rK given F(K, L) $\geq$ Q with F(K, L) strictly increasing in K and L. The conditional factor demands K*(Q, w, r) and L*(Q, ...
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Ownership in Neoclassical Economics/Property Rights Question

I'm currently looking at New Institutional Economics and I can't get my head around the assumption of the neoclassical irrelevance theorem stated by the neoclassical economics. It doesn't matter ...
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Are modern conglomerate mergers better or worse for economic competition?

Modern conglomerate mergers differ from those from decades ago as, even though they takeover smaller companies, they have a more narrow focus on related business and, in order to be successful, have ...
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How to evaluate customer lifetime value

I am learning about calculating Customer Lifetime Value (CLV). So far I have learned that there are many ways to calculate it, like stated here, which I understand, different industries will also need ...
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2answers
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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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2answers
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Proof of Choice Coherence in Kreps (2013)

In the first chapter of Kreps (2013), there is a proof that the choice function satisfies choice coherence. Kreps writes: I do not understand how the third sentence of (b) logically follows from the ...
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Economics of Selling Software

My understanding: Normally, selling a product has an increasing marginal cost per unit produced. Very often this increases more and more due to poor allocation of resources (diminishing returns). ...
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1answer
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Question about Locally non-satiated preferences

If a consumer has locally non-satiated preferences, which of these 2 bundles is preferred and why? Bundle A: (1,3) Bundle B: (4,2) This is what I've reasoned from my very limited understanding of ...
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1answer
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Optimal choice for a weird leontief function

Compute the optimal choice for a consumer with the following utility function: $$u(x_1, x_2) =\max \{\min(2x_1, x_2), \min(x_1, 2x_2)\}$$ I'm familiar with computing optimal choice for perfect ...
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1answer
26 views

Effect of Promotional Sales on a Demand Curve

If there is news that shops are having a sale on dress shoes (beginning right now), will it shift the demand curve for this good? I initially said yes, as a sale should increase the quantity demanded ...
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1answer
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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
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Giffen Goods & Complementary Goods

Consider that good X and good Y are complements and good X is a Giffen good. If I increase the price of good X, what affect does this have on the price and quantity demanded of good Y? My reasoning ...
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1answer
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What is the assumption behind “indifference curve does not cross”?

If only weak-ordering and continuity is assumed, "ICs" can definitely intersect. If we assume Monotonicity or convexity in addition to weak-ordering, then we can get "no cross of IC". But those two ...
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Net Present Value with investments in multiple phases

I am trying to calculate the Net Present Value for a theoretical project in which, unlike most examples in textbooks and on internet tutorials, investments do not only happen in t=0, but they also ...
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0answers
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Take It Or Leave It Strategy: Social Optimum

Here is what I understood Using Backward Induction, I inferred that buyer offers a price, say, $P$ and the seller will sell only if $P \geq c(I)$. Setting the lowest possible Price that will ensure ...
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2answers
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How to visually present a simultaneous game with continuous strategies

I've been asked to model a game where two players have an infinite choice of strategies and move simultaneously. The question asks to present the game in game table or extensive form, and to justify ...
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1answer
44 views

Strict preference and utility function

If strict preferences over three outcomes x, y and z, do not satisfy transitivity, so that $x \succ y \succ z \succ x$, then these preferences cannot be represented by a utility function. Is this ...
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1answer
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The impact of news in the stock market?

I am currently working on a large sample of textual data from news articles. I was just wondering whether there exists any studies which tries to explain the market anomaly known as "The-Day-Of-The-...
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2answers
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Why is there so little automation at McDonald's?

I'm currently at a McDonald's in Norway (so, not a country where labour is dirt cheap, even for relatively unqualified jobs), and I'm struck by how manual every process is, from cooking the meat to ...
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2answers
166 views

Independence of price and wealth in Walras' Law [closed]

The following theorem from Mas-Collel, Whinston and Green's Microeconomic Theory (3rd Edition) assumes $\frac {\partial {w}}{\partial {p}}$ to be zero. I would to like to know the reason behind such ...
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Implications of homogeneity of degree zero in the Walrasian demand function

Mas Colell, Winston and Green's Microeconomic Theory (3rd edition) has the following proposition (2.E.1): What is its proof? Definition of homogeneity of degree zero: Notation: $D$: Derivative ...
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1answer
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How to find the optimal consumption basket? [closed]

A consumer has the following utility function and income. 𝑈(𝑥, 𝑦) =1/2 * ln 𝑥 + 1/2 * ln y Price of 𝑥 = Price of 𝑦 = 100. Income = 1000 Suppose that the consumer gets 2 redeemable coupons for ...
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1answer
58 views

Quasi-Linear Functions

I understand that quasi-linear functions have a general form $U(x_1,x_2,...,x_n,y) = f(x_1,x_2,...,x_n) + y$ and that for a quasi-linear function, the income effect with respect to the other ...
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3answers
284 views

Why wouldn't competition prevent “usurious” payday loan rates?

The current Wiki page on "Payday Loans" claims loans are priced above marginal cost. The justification is that If a lender chooses to innovate and reduce cost to borrowers in order to secure a ...
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1answer
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3rd Degree Price Discrimination

I came across a True/False question in my economics problem set: Is the following statement true or false? "A monopolist can practice third-degree price discrimination in the two markets it ...
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0answers
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Insurance and Hirshleifer effect

I am trying to understand the statmement that 'public information kills insurance opportunity' -- referred to as Hirshleifer effect. Does it (in general) lead to some undesirable outcomes? Could you ...
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1answer
49 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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1answer
38 views

By what means does prices changes?

The classical supply and demand theory states that prices and quantities of a given good (in a perfectly competitive market) are determined by the supply and demand of that good, a shift in the demand ...
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0answers
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Equivalence of definitions of upper contour sets

Mas-Collel, Winston and Green's Microeconomic Theory (3rd editions) offers two definitions of the upper contour set: How can the equivalence between the two definitions be proved?