Questions tagged [supply-and-demand]

Supply and Demand is an economic model of price determination in a market. Demand refers to how much (quantity) of a product or service is desired by buyers. Supply represents how much the market can offer.

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Difference between Giffen and inferior goods. Why aren't all inferior goods Giffen goods?

What is the difference between an inferior good and a Giffen good? Are the two following definitions for an inferior good equivalent? Def 1: An inferior good is a good for which the demand decreases ...
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Calculate profit when trading between more than two goods

When trading two goods (or currencies) it is relatively easy to say if you are making profit when you know the exchange rates. For example Person A trades Bananas for Person B's Apples. Person A gives ...
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Are there more historical examples of big change in prices thanks to demand/supply changes like the tulip mania?

I'm currently searching for historical changes in prices as a result of a big/sudden change in demand/supply, like the tulip mania in Holland. Are there any notable examples?
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Why does quantity supplied increase with price in economics?

The Law of Supply is my worst enemy in economics because I could never truly understand it, and as a result, the stuff I learned after that was built on a weak foundation. The Law of Demand is totally ...
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Market impact function

I have the following Dynamical system for market impact function $$p_{t+1}-p_t=a(d_t-s_t)$$ $$s_{t+1}-s_t=bp_ts_t-cs_t$$ $$d_t=y-rp_t$$ where $s_t$ is quantity supplied, $d_t$ is quantity demanded, ...
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What is a good way to generate realistic utility curves?

I am aiming to program a basic simulation of a simplified economy to look at the impact of various interventions. The economy will have N groups of homogeneous consumers and M producer / employer ...
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Why are demand and supply curves shown as concave up?

Why is it that demand and supply curves are typically shown in graphs, including in Econ 101, as concave up (i.e., convex)? I know what it entails mathematically—that if $p(q_d)$ is a demand curve, $...
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Are businesses and individuals buying clean / green / renewable energy contribute to slowing down the climate change?

I'm not sure if an individual choosing a "green energy supplier" is making any difference. My (potentially naive, uneducated) logic is as follows: ...
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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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Have automation and technological advance been shown to have a positive impact on society and the economy or a negative one?

My friends and I, 2 of which are computer science majors think it is worse because is humans can't work and thus afford necessities, how will they survive? The definition of automation: the use of ...
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Why can't the Land-Value Tax (in some cases) be passed on to tenants?

According to https://en.wikipedia.org/wiki/Land_value_tax: Because the supply of land is essentially fixed, land rents depend on what tenants are prepared to pay, That doesn't make any sense. If ...
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Supply elasticity of finite (non-renewable) resources

What is the elasticity of supply of a finite (non-renewable) resource that cannot be replaced (i.e. fixed stock)? Intuitively it seems like it should be inelastic, yet I can also reason elastic.
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When does the law of diminishing returns apply?

Law of diminishing returns does not always apply: The law of diminishing returns states that in all productive processes, adding more of one factor of production, while holding all others constant, ...
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Re-evaluation of Consumer Price Index (C.P.I.) weights

How are the weights of the various household items in the Consumer Price Index (C.P.I.) basket decided, i.e., how are they re-evaluated every year? Is it done manually or automatically? If its done ...
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How can you model/simulate the price/value of a good?

Let's say that you have a good which price can change quite often because of its demand. Let's assume that you developed an algorithm that changes continuously the supply of the good to make its value ...
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Question Regarding Equilibrium Price & Surplus

So here's an example of a standard Supply & Demand Relationship for an Individual Supplier: As a supplier, for 1 dollar, I'll produce 1 unit of something. For 2 dollars, I'll produce 2 units, for ...
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Supply curve when the marginal cost is zero

The supply curve is built as the average marginal cost (MC), when the MC is equal or higher than the average cost (AC) The marginal cost increases, as a result of the opposite effect of marginal ...
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Interpretation of $\frac{\partial }{\partial p_1}Q_1(p_1, p_2)/\frac{\partial}{\partial p_2} Q_1(p_1, p_2)$

I am interested in an economic interpretation for the ratio of partial derivatives of a demand function $Q_1(p_1, p_2)$, which is \begin{equation} t=\frac{\frac{\partial}{\partial p_1}Q_1(p_1, p_2)}{\...
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Uniform price vs discriminatory price double auction

Uniform price and discriminatory price double auctions are the most commonly used auction mechanisms in the trading markets especially in peer to peer energy trading markets. However, I could find ...
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How to calculate clearing when supply demand curve do not intersect

I am working on a P2P energy trading project and want to implement a uniform price double auction. I have confusion about how the clearing price will be determined if the supply-demand curves do not ...
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elasticity of income if price changes by 10 percent

Arista always spends 10 % of her income on whatzits. Assume that her income increases by some percentage while the price of whatzits remains constant (and that all whatzits cost the same). What is ...
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Perfectly elastic supply

How would you algebraically write a perfectly elastic supply? Will it be infinite at price = 4? (The choice of the number 4 is completely arbitrary)
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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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Is the supply of a price-taking firm increasing in price?

Is the supply of a price-taking firm increasing in price? When the price goes up, this means that firms can make more profit. Therefore, they would want to increase their supply. Is there a way to ...
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Examples of textbook definitions of transaction costs, for a non-econ student

I'm not an econ major, neither am I taking it as a minor, however seemingly out of nowhere economics has jumped into my CS class when talking about the role of IT in reducing transaction costs of ...
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Cobb-Douglas demand yields a zero marginal revenue, monopolies don't exist?

From here and a pile of maths that I've done myself, $x_1 = \frac{a}{a+b}\frac{m}{p_1} \\ x_2= \frac{b}{a+b}\frac{m}{p_2}$ This yields inverse demand equations, when you have numbers stand in for $...
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When everyone sells at an event of a recession, who buys?

I'm trying to walk through and understand the basic events of the great depression. I understand that at one point (Black Thursday) the news of a downfall of stock prices hit investors, so they ...
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Individual Firm and Market Demand Curve

In Section 10.2, Monopoly Power, in Pindyck's text on Microeconomics, an example says that suppose $N$ firms produce a particular product and the market demand curve is $P = -aQ + b$. An individual ...
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“Supply creates its own demand. Only by consistently supplying it can we hope to increase the demand for the substantive over the superficial”

Keynes has disapproved the say's law "supply creates its own demand" but I want to know if there is any empirical evidence that this law doesn't hold true? Theoretically, keynes successfully ...
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Aggregating individual demand curves

I'm aggregating individual demand curves but the demand curves are inelastic or elastic. Say, 20 people have an elastic demand for a product at price of $2. Another 40 people have an elastic demand ...
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What does it mean by Global recession?

I am bit curious to understand what it actually means when I read global recession is coming soon. There are some questions which pop in my mind reading such news. Some of them are: What causes ...
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Is it right to derive social marginal benefit by adding individual prices instead of quantities?

I come across a lecture material on market functions and externalities that makes me quite confused. Here's the setup: Two stores are located next to each other. If one installs a camera system in ...
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Profits and Aggregate Supply

I feel like this is quite a stupid question, but I can't wrap my head around it. Why do suppliers make less of a good as profits drop? Intuitively, shouldn't they make more of the good in order to ...
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(Microeconomics) Why must fims always lower prices when there is excess supply?

This may seem like a basic question but it has been really bothering me for a while. I understand what excess supply is, and my question is regarding the firms' response to it. All economics texbooks ...
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A basic question about supply and demand graph

i have some basic knowledge on economics ,and i had an argument with a friend ,so my question is this , as we all know (If we ignore all the outside factors) that the price of any product is ...
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Most profitable conversion of stock into money

When Forbes-lists of top billionaires are published we are usually aghast of their riches and statements such as "the 8 richest people own as much as the poorer half" are disseminated. I was ...
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The law of supply and demand - How does it work?

I've learned what the principle of supply and demand says, and would paraphrase it like this: The price of a good is at equilibrium when supply and demand are equal. Or with other words: The ...
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Is there any specific significance of inverse demand?

Why do we need separate form of demand? Where do we use inverse demand form? concept only.
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Supply curve for a competitive firm with constant MC

I know that for a perfectly competitive firm, the supply curve is given by $p=MC \ge AVC$, where $AVC$ is the average variable cost. Now I get really confused when the $MC$ comes out to be a constant....
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Why do some businesses choose scarcity as their business model instead of raising the price to meet the demand?

Here are some examples of what I'm talking about: Mass events such as Burning Man, the Olympics, and the World Cup sell out tickets very quickly which forces fans to resort to scalping or using bots ...
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Problem finding Demand Function [closed]

I am analyzing pricing for a new streaming service for a school project. My thought is to calculate the demand function of a player in the same industry and then calculate the optimal price. I am a ...
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Why are prices made available to the public?

Price in micro is the point at which demand and supply meet. But in real world no one knows about the actual demand curve or supply curve. yet prices are set, so in a way there is a lot of costs being ...
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What impact would introducing 15 times more soy worldwide do to the price of soy?

Soy is a commodity and the main export of Argentina. It is said Argentina has 40 million of hectares of arable land and it produces food for 400 million persons and that potentially could make food ...
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Effect of money supply on price level

Consider a macroeconomy defined by following equations: $$M = kPy + L(r)$$ $$S(r) = I(r)$$ $$y = m $$ Where $M$ is money supply, $P$ is price level, $y$ is output, $r$ is interest rate, while $k,m$ ...
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Impact of vegetarianism on the meat industries

My main goal is to get rid of mass husbandry and the environmental impact of industrial meat production. My question is: Is it better to abandon meat from my diet completely or to endorse eco-riendly ...
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What do the excess supply and demand numbers in this chart mean?

From Econ 101, I thought markets are supposed to equilibrate so that there isn't any excess supply or excess demand. But from a WSJ story, we have the chart below. I believe it says, for example, ...
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Clearing price in a double auction market

I have been reading a paper on energy markets and I have stumbled upon double markets and clearing prices, which got me quite confused (bare in mind, I am relatively new to this topic). Quote from the ...
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By what means do prices change?

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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Constant elasticity proof for log-linear demand curve

From Perloff 2008e solved 2.2: Q: Show that the elasticity of demand is a constant e if the demand function is log-linear, ln Q=ln A+e ln p. A: Differentiating with respect to p, we find that (dQ/dp)/...
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How can power/electricity prices be negative?

Bloomberg shows this chart: I understand the above chart to mean that consumers were actually paid to use electricity. (Please correct me if I'm mistaken.) I was wondering how this is possible? How ...