# Questions tagged [demand]

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### Definition of strictly convex preference

Let $x,y\in X$. Does strictly convex preference (which implies that the utility is strictly quasiconcave) mean that: $x\succsim y$ implies $\alpha x+(1-\alpha)y\succ y$ for any $\alpha\in (0,1)$?
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### Finding demand functions for an unusual utility function

I have a utility function: $U = x + \min\{x,y\}$ I want to draw the indifference curve and find the demand functions. Will it be the case of the usual perfect complements? Also, what preferences ...
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### Approaches in demand analysis

What is the difference between Engel Curve and the system approach of demand analysis?
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### What are the advantages of using demand systems estimation? How is this different from individual demand estimation for product?

I don't understand how is demand systems estimation is different from simple demand equation estimation. What's the best resource for getting a history line of demand systems?
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### functional form for a consumption shock

In a DSGE model, how can I add a disturbance/shock in the consumption of households? For example given my utility function $$U(C,H) = \frac{C_t^{1-\theta}}{1-\theta} - \frac{B}{\eta} H_t^\eta,$$ ...
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### How to derive the Indirect Utility Function and Marshallian Demand from Homothetic Preferences

I need to prove the following relationships: 1 - If preferences are homothetic, then the indirect utility function can be written as $v(p, w) = v(p) · w$. 2 - If preferences are homothetic, then the ...
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### Why do stocks that don’t pay any dividends change price when the company does better?

I don’t understand why (non-dividend paying) stocks increase in price when a company is successful; is it just because everyone expects that everyone else will find it more valuable because the ...
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### Homework Question - Price Floor / Elasticity of Demand

I'm currently taking undergrad microeconomics and came across the following question: The current price floor in the agricultural lettuce market makes it such that price of lettuce is 25% higher than ...
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### The optimal price for a demand curve with a steep slope

Given the demand function, $$D(p)=A-ap$$ I've found the optimal price, $$p=\frac{A+ac}{2a}$$ Where $c$ is cost and $A,a >0$. My question is how is the optimal price is dependent of $a$ (1) - what ...
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### Budget Set- closed and boundedness

I am fairly new to economics, and we were introduced to budget sets, The professor mentioned that the budget set $B(p,w) = \{x \in R^{l}_{+}: px \leq w\}$ is non empty and closed - I could prove the ...
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### CES utility function in an Edgeworth box

Two consumers have the CES utility function $x_1^\beta +x_2^\beta$, for $0<\beta<1$, their initial endowments are $w^1=(1,0)$, $w^2=(0,1)$ Draw the Core of this economy in an Edgeworth box. Note ...
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### Walrasian demand with a twist of Leontief function

A consumer has the utility function $u(x_1; x_2) = \min(x_1; x_2) + 5 \max(x_1; x_2)$. Find its Walrasian demand $x^*(p; w)$. I've tried searching it up when we have two Leontief functions summed ...
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### Effect of price on utility

A consumer has an endowment vector $w$; at prices $p$ his demand for the first good exceeds his endowment; $x_1^+(p; pw)>w_1$ then a small increase of $p_1$ will lower his utility. I was discussing ...
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### Price elasticity of demand always increases with price?

Is there a closed-form continuous demand function whose price elasticity of demand decreases with the price?
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### Prove the equation

Let $$x^0=x^*(p^0,w)$$ then $$v(p,px^0)$$ is minimized at $$p=p^0$$ What theorem are we supposed to use in order to solve this, because I am a bit lost. Thanks in advance for all the suggestions/help....
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### Are all market demands residual demands to some extent?

I’ve been thinking about how the introduction of a new product, say a new substitute, impacts market demand. Intuitively I know that it would decrease demand and increase elasticity. I am curious ...
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### Examples of bounded, positive, inverse demand curves

The three most common examples of demand curves I am aware of are \begin{align} Q&= b - aP,\\ Q&= bP^a,\\ Q&= b e^{-aP}\\ \end{align} The first being our classic linear demand curve, the ...
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### Can individual consumers ever be price-makers, and can they thereby have major effects on welfare?

Suppose there's a big demand shock on some good X. As long as X has fairly standard supply and demand curves, that'll raise the price. And all of the buyers who would have bought at the lower price ...
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### Is saying that the demand is elastic or inelastic too oversimplified?

As we know that elasticity varies from infinity to zero as we move along a linear demand curve, then is it correct to label any demand curve elastic or inelastic as a whole?
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### Intermediate demand vs. Intermediate consumption

I am trying to understand what's the difference between intermediate consumption and intermediate demand. The context is the European System of Accounts, which says that intermediate demand is the ...
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### what is monotonicity and strict monotonicity in preferences?

I am really confused between monotonic preferences and strictly monotonic preferences, I saw some video and read certain answer where it is mentioned that the When preferences are monotone / weak ...
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### Is whatever they calculated a valid “demand elasticity”?

https://medium.com/@kwrdarisipudi/demand-elasticity-of-iphones-1e3a7bbb9eac They are saying iPhone demand is less responsive to price over time, but I disagree. Income shifts the demand curve. Higher ...
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### confusion regarding elasticity of a demand curve

The following question is on a quiz at Marginal Revolution University: https://mru.org/practice-questions/calculating-elasticity-demand-practice-questions The elasticity of demand is 2.0. Is the ...
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### What additional axiom to GARP do we need to generate a differentiable or smooth utility function

After researching for a while, I find this: https://www.jstor.org/stable/1913607?seq=2#metadata_info_tab_contents They come up with an axiom called SSARP that generates a preference with smooth demand ...
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### Quasi-linear utility. Deriving demand

I was trying to derive a general demand for the good $x$ for this quasi-linear function $u(x,y) = y + 2\sqrt{x}$ subject to standard budget constraint $p_x x + p_y y \leq M$ Using Kuhn-Tucker ...
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### Interpreting the q-intercept of the demand curve

Given a demand curve for a particular commodity, which I'll interpret as a function $p(q)$, the $p$-intercept can be interpreted as the choke price, i.e. the lowest price at which quantity demanded is ...
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### When the global optimal is outside of the constraint set, what will be the demand?

$u:\mathbb R^n\to\mathbb R$ is a quasi-concave utility function so the indifference curves are convex. $a,b\in\mathbb R^n$ are two points. Our budget set is the (one-dimensional) segment $[a,b]$ that ...
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### Increase in the price of skateboard wheels cause a decrease/no change in the demand of skateboards? (2 separate markets w/ 2 separate buyers)

Would an increase in the price of skateboard wheels cause a decrease/no change in the demand of skateboards? (2 separate markets with 2 separate buyers) Note: I'm going to be mainly focused on the ...
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### Terminology, is elasticity used as “mean elasticity”?

Given a demand $q$ and a price $p$ sutch that $q=q(p)$, the elasticity of demand is given by, $\epsilon = \frac{p}{q}\frac{dq}{dp}$ which depends on the price. But, when reading papers about ...
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### elasticity from inverse demand

I was wondering of my thinking here was right: Given $$e=\frac{dQ}{dp}*\frac{p}{Q},$$ where $e$ is elasticity, $dQ/dp$ is first derivative of demand function, $p$ is price and $Q$ is quantity. ...