Everything about Price Adjustment totally explained
In
economics, the concept of
quantity adjustment refers to one possible result of
supply and demand disequilibrium in a
market, either due to or in the absence of external constraints on the market. In the textbook story, if the quantity demanded doesn't equal the quantity supplied in a market,
price adjustment is the rule: if there's a market
surplus or glut (excess supply), prices fall, ending the glut, while a
shortage (excess demand) causes price rises. However, instead of price adjustment -- or, more likely,
simultaneously with price adjustment -- quantities may adjust: a market surplus leads to a cut-back in the quantity supplied, while a shortage causes a cut-back in the quantity demanded. The "short side" of the market dominates, with limited quantity demanded constraining supply in the first case and limited quantity supplied constraining demand in the second.
Economist
Alfred Marshall saw market adjustment in quantity-adjustment terms in the short run. During a given "market day," the amount on the market was
given -- but it adjusts in the short run, a longer period: if the "supply price" (the price suppliers were willing to accept) was below the "demand price" (what purchasers were willing to pay), the quantity in the market would rise. If the supply price exceeded the demand price, on the other hand, the quantity on the market would fall.
Quantity adjustment contrasts with the tradition of
Leon Walras and
general equilibrium. For Walras, (ideal) markets operated
as if there were an Auctioneer who called out prices and asked for quantities supplied and demanded. Prices were then varied (in a process called
tatonnement or groping) until the market "cleared," with each quantity demanded equal to the corresponding quantity supplied. No actual trading was allowed until the market-clearing price was determined. In Walras' system, only price adjustment operated equate the quantity supplied with the quantity demanded.
A simple model for price adjustment is the
Evans price adjustment model, which proposes the differential equation
»
which says that the rate of change of price is proportional to the difference in supply and demand. This equation predicts that if demand exceeds supply, price will increase, and vice versa, and also captures the market equilibrium occurring when supply and demand are balanced.
Further Information
Get more info on 'Price Adjustment'.
|
External Link Exchanges
Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:
<a href="http://quantity_adjustment.totallyexplained.com">Quantity adjustment Totally Explained</a>
Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned. |
