<p>As the passage says, the demand curve is affected, but the supply curve is not. In a monopoly model of supply firms, the demand curve might in turn affect the firm's willingness to sell at a particular price; if a monopoly sees that there's a lot of people willing to pay \$10, the firm may be reluctant to sell any at \$6 for fear it will undercut its ability to sell at $10. But in a competitive model of supply firms, the firms' willingness to sell is determined entirely by whether the price in question exceeds the cost, and does not depend on the demand curve. In a competitive market, a firm isn't going to refuse to sell at \$6 just because they think the potential customers would be willing to pay \$10; if they did, another firm would come along and sell at \$6 instead.</p>

CC BY-SA 4.0
2021-05-23T23:18:10.493Z
2021-05-24T14:32:31.220Z
2021-05-24T14:32:31.220Z
Acccumulation
<p>Yes, you are wrong. As the quoted part explains,</p>
<blockquote>
<p>In this case, economists say there has been an increase in “quantity supplied” but no change in “supply.” Supply refers to the position of the supply curve, whereas the quantity supplied refers to the amount producers wish to sell.</p>
</blockquote>
<p>Are you willing to sell your current computer for say \$1 000? What is the lowest price that you are <em>willing</em> to sell for? (Just a ballpark estimate will do.)</p>
<p>If you came up with a number, you did that without knowing anything about the prospective buyers of your computer.</p>
<p>Of course it is very nice to be <em>able</em> to sell for more, if the customers are - for some reason - willing to paying more, but the ability to do this is determined by the equilibrium. The supply curve merely describes the vendors' preferences. What is the lowest price at which they are <em>willing</em> to sell / what quantity are they willing to sell if the price turns out to be X.</p>

CC BY-SA 4.0
2021-05-23T08:25:13.203Z
Giskard, Thank you very much for your answer.
tchappy ha
CC BY-SA 4.0
2021-05-23T08:04:48.513Z
2021-05-23T08:16:37.157Z
2021-05-23T08:16:37.157Z
Giskard
<p>I am reading &quot;Principles of Economics&quot; by N. Gregory Mankiw.</p>
<p>I think hot weather alters firms' desire to sell at some given price because hot weather increases the demand for ice cream.</p>
<p>Am I wrong?</p>
<blockquote>
<p>Notice that when hot
weather increases the demand for ice cream and drives up the price, the quantity
of ice cream that firms supply rises, even though the supply curve remains the
same. In this case, economists say there has been an increase in “quantity supplied”
but no change in “supply.”
Supply refers to the position of the supply curve, whereas the quantity supplied
refers to the amount producers wish to sell. In this example, supply does not
change <em><strong>because the weather does not alter firms’ desire to sell at any given price</strong></em>.
Instead, the hot weather alters consumers’ desire to buy at any given price and
thereby shifts the demand curve to the right. The increase in demand causes the
equilibrium price to rise. When the price rises, the quantity supplied rises. This
increase in quantity supplied is represented by the movement along the supply
curve.</p>
</blockquote>

CC BY-SA 4.0
2021-05-23T21:48:45.147Z
I've never seen a company (for example, Baskin Robbins) increase the price of ice cream in the summer, and then reduce it in the autumn.
RonJohn
<supply-and-demand>
I think hot weather alters firms' desire to sell at some given price because hot weather increases the demand for ice cream. (Mankiw's book)
tchappy ha
# I think hot weather alters firms' desire to sell at some given price because hot weather increases the demand for ice cream. (Mankiw's book)

(Asked by: username_0 on 2021-05-23)

I am reading "Principles of Economics" by N. Gregory Mankiw.

I think hot weather alters firms' desire to sell at some given price because hot weather increases the demand for ice cream.

Am I wrong?

> Notice that when hot
> weather increases the demand for ice cream and drives up the price, the quantity
> of ice cream that firms supply rises, even though the supply curve remains the
> same. In this case, economists say there has been an increase in “quantity supplied”
> but no change in “supply.”
> Supply refers to the position of the supply curve, whereas the quantity supplied
> refers to the amount producers wish to sell. In this example, supply does not
> change ***because the weather does not alter firms’ desire to sell at any given price***.
> Instead, the hot weather alters consumers’ desire to buy at any given price and
> thereby shifts the demand curve to the right. The increase in demand causes the
> equilibrium price to rise. When the price rises, the quantity supplied rises. This
> increase in quantity supplied is represented by the movement along the supply
> curve.

**Tags:** supply-and-demand

> **Comments:**
> **username_1**: I've never seen a company (for example, Baskin Robbins) increase the price of ice cream in the summer, and then reduce it in the autumn.  

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## 2 answers

### Answer by username_3 on 2021-05-23. Score: 6 | Accepted answer

Yes, you are wrong. As the quoted part explains,

> In this case, economists say there has been an increase in “quantity supplied” but no change in “supply.” Supply refers to the position of the supply curve, whereas the quantity supplied refers to the amount producers wish to sell.

Are you willing to sell your current computer for say \$1 000? What is the lowest price that you are *willing* to sell for? (Just a ballpark estimate will do.)

If you came up with a number, you did that without knowing anything about the prospective buyers of your computer.

Of course it is very nice to be *able* to sell for more, if the customers are - for some reason - willing to paying more, but the ability to do this is determined by the equilibrium. The supply curve merely describes the vendors' preferences. What is the lowest price at which they are *willing* to sell / what quantity are they willing to sell if the price turns out to be X.

> **Comments:**
> **username_0**: username_3, Thank you very much for your answer.  

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### Answer by username_2 on 2021-05-23. Score: 0

As the passage says, the demand curve is affected, but the supply curve is not. In a monopoly model of supply firms, the demand curve might in turn affect the firm's willingness to sell at a particular price; if a monopoly sees that there's a lot of people willing to pay \$10, the firm may be reluctant to sell any at \$6 for fear it will undercut its ability to sell at $10. But in a competitive model of supply firms, the firms' willingness to sell is determined entirely by whether the price in question exceeds the cost, and does not depend on the demand curve. In a competitive market, a firm isn't going to refuse to sell at \$6 just because they think the potential customers would be willing to pay \$10; if they did, another firm would come along and sell at \$6 instead.


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