ArticleController :: show
Request
GET Parameters
None
POST Parameters
None
Uploaded Files
None
Request Attributes
Key | Value |
---|---|
_controller | "App\Controller\ArticleController::show" |
_firewall_context | "security.firewall.map.context.main" |
_links | Symfony\Component\WebLink\GenericLinkProvider {#3685 -links: [ 3806 => Symfony\Component\WebLink\Link {#3806 -href: "/build/runtime.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3804 => Symfony\Component\WebLink\Link {#3804 -href: "/build/644.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3803 => Symfony\Component\WebLink\Link {#3803 -href: "/build/502.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3802 => Symfony\Component\WebLink\Link {#3802 -href: "/build/app.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3801 => Symfony\Component\WebLink\Link {#3801 -href: "/build/view-more.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3800 => Symfony\Component\WebLink\Link {#3800 -href: "/build/term-condition.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3799 => Symfony\Component\WebLink\Link {#3799 -href: "/build/contact.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3798 => Symfony\Component\WebLink\Link {#3798 -href: "/build/scroll-infinite-article.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3797 => Symfony\Component\WebLink\Link {#3797 -href: "/build/app.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } 3796 => Symfony\Component\WebLink\Link {#3796 -href: "/build/cookie-style.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } 3795 => Symfony\Component\WebLink\Link {#3795 -href: "/build/term-condition-css.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } 3794 => Symfony\Component\WebLink\Link {#3794 -href: "/build/contact-css.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } 3793 => Symfony\Component\WebLink\Link {#3793 -href: "/build/comment-css.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } ] } |
_route | "article_show" |
_route_params | [ "category" => "global-economy" "slug" => "supply-and-demand-the-scissors-banana-and-the-parrot" ] |
_security_firewall_run | "_security_main" |
_stopwatch_token | "079615" |
category | "global-economy" |
slug | "supply-and-demand-the-scissors-banana-and-the-parrot" |
Request Headers
Header | Value |
---|---|
accept | "*/*" |
accept-encoding | "gzip, br, zstd, deflate" |
connection | "close" |
cookie | "PHPSESSID=89ps1dbdhnf9dmnvnjuk9vhnja" |
host | "rct.dev.bbntimes.com" |
user-agent | "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)" |
x-php-ob-level | "1" |
Request Content
Request content not available (it was retrieved as a resource).
Response
Response Headers
Header | Value |
---|---|
cache-control | "no-cache, private" |
content-type | "text/html; charset=UTF-8" |
date | "Sat, 22 Feb 2025 13:28:16 GMT" |
link | "</build/runtime.js>; rel="preload"; as="script",</build/644.js>; rel="preload"; as="script",</build/502.js>; rel="preload"; as="script",</build/app.js>; rel="preload"; as="script",</build/view-more.js>; rel="preload"; as="script",</build/term-condition.js>; rel="preload"; as="script",</build/contact.js>; rel="preload"; as="script",</build/scroll-infinite-article.js>; rel="preload"; as="script",</build/app.css>; rel="preload"; as="style",</build/cookie-style.css>; rel="preload"; as="style",</build/term-condition-css.css>; rel="preload"; as="style",</build/contact-css.css>; rel="preload"; as="style",</build/comment-css.css>; rel="preload"; as="style"" |
x-debug-token | "d6bda3" |
Cookies
Request Cookies
Key | Value |
---|---|
PHPSESSID | "89ps1dbdhnf9dmnvnjuk9vhnja" |
Response Cookies
No response cookies
Session 6
Session Metadata
Key | Value |
---|---|
Created | "Sat, 22 Feb 25 13:27:49 +0000" |
Last used | "Sat, 22 Feb 25 13:28:13 +0000" |
Lifetime | 0 |
Session Attributes
Attribute | Value |
---|---|
_csrf/https-comment | "9uuo4kxspdcb6-bdbgUVI6Xbazh3XOpyjOoHqpmAgLM" |
_csrf/https-cookie_accept | "weG4qPJtOjH22dwLM4neAFzWdKIAg4ZIpP-_8k81NUM" |
Session Usage
6
Usages
Stateless check enabled
Usage |
---|
Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage:76
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Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage:79
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Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage:52
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Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage:56
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Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage:41
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current_article | App\Entity\Article {#1094 -id: 6731 -title: "Supply and Demand: The Scissors, Banana, and the Parrot" -slug: "supply-and-demand-the-scissors-banana-and-the-parrot" -introtext: "<p class="p2"><span class="s1" style="color: #000000;">The time for introducing a fresh group of students to supply and demand is soon to be upon us. </span></p>\r\n" -content: """ \r\n <p class="p2"><span class="s1" style="color: #000000;">In a spirit of sympathy and support, here us some background on three images used by prominent economists about supply and demand: the scissors, the banana, and the parrot.</span></p>\r\n <p class="p4"><span class="s1" style="color: #000000;">A common question for students, and a common error for teachers, is to discuss situations of supply and demand as if only one of these forces was relevant at a certain time. But of course, when it comes to considering the effects of a shift in demand on equilibrium price and quantity, the shape of the supply curve is highly relevant, because a shift in demand happens along a supply curve. Similarly, when it comes to considering the effects of a shift in supply on equilibrium price and quantity, the shape of the demand curve is highly relevant, because the shift in demand happens along a supply curve.</span></p>\r\n <p class="p4"><span class="s2"><a href="http://www.econlib.org/library/Marshall/marP30.html">Alfred Marshall made this point elegantly in his 1890 <span class="s3"><i>Principles of Economics</i></span></a></span><span class="s1">,<span style="color: #000000;"> where he famously analogized supply and demand to the two blades of a pair of scissors. He wrote: </span></span></p>\r\n <p class="p4" style="padding-left: 30px;"><span class="s1" style="color: #000000;">We might as reasonably dispute whether it is the upper or the under blade of a pair of scissors that cuts a piece of paper, as whether value is governed by utility or cost of production. It is true that when one blade is held still, and the cutting is effected by moving the other, we may say with careless brevity that the cutting is done by the second; but the statement is not strictly accurate, and is to be excused only so long as it claims to be merely a popular and not a strictly scientific account of what happens.</span></p>\r\n <p class="p4"><span class="s1" style="color: #000000;">Another common question for students is to ask where prices come from in a market economy. I've never found an explanation more crisp and straightforward than this one from Joan Robinson (from the </span></p>\r\n <p class="p4"><span class="s1" style="color: #000000;">original Introduction to her 1933 book <i>The Economics of Imperfect Competition</i>, as reprinted in the 1969 second issue, pp. 6-7): </span></p>\r\n <p class="p4" style="padding-left: 30px;"><span class="s1" style="color: #000000;">It is not easy to explain what the analysis of value is, without making it appear extremely mysterious and extremely foolish. The point may be put like this: You see two men, one of whom is giving a banana to the other, and is taking a penny from him. You ask, How is it that a banana costs a penny rather than any other sum? The most obvious line of attack on this question os to break it up into two fresh questions: How does it happen that the one many will take a penny for a banana? and: How does it happen that the other man will give a penny for a banana? In short, the natural thing is to divide up the problem under two heads: Supply and Demand.</span></p>\r\n <p class="p4"><span class="s1"><span style="color: #000000;">Finally, there's the old joke(?) among economists that you can teach a parrot to be a perfectly good economist. All you need to do is train the bird to answer every question by saying: "Supply and demand." Some version of this joke has appeared in a number of economics textbooks, and probably in even more lectures. </span><a href="https://quoteinvestigator.com/2013/07/19/parrot-econ/"><span class="s4">Garson O’Toole took on the job of tracing the origins of this comment at his Quote Investigator website.</span></a> <span style="color: #000000;">He finds multiple cases of anonymous writers and book reviewers going back to 1850 referring to supply and demand as "parrot words."</span></span></p>\r\n <p class="p4"><span class="s1"><span style="color: #000000;">But perhaps the first case of the "joke" appearing in full in the work of a prominent economist is in </span><a href="https://books.google.com/books?id=LhcZAAAAYAAJ&q=parrot#v=snippet&q=parrot&f=false"><span class="s4">Irving Fisher's 1907 classic</span></a> <span style="color: #000000;"><i>The Rate of Interest: Its Nature, Determination and Relation to Economic Phenomena. </i>But in taking a closer look at Fisher's comment, he is actually using the "joke" as a way of warning against an overly facile reliance on supply and demand as a quick-and-dirty, thoughtless form of explanation. Fisher writes: </span></span><span class="s1" style="color: #000000;"></span></p>\r\n <p class="p4" style="padding-left: 30px;"><span class="s1" style="color: #000000;">If a modern business man is asked what determines the rate of interest, he may usually be expected to answer, "the supply and demand of loanable money." But "supply and demand" is a phrase which has been too often forced into service to cover up difficult problems. Even economists have been prone to employ it to describe economic causation which they could not unravel. It was once wittily remarked of the early writers on economic problems: "Catch a parrot and teach him to say `supply and demand,' and you have an excellent economist." Prices, wages, rent, interest, and profits were thought to be fully "explained" by this glib phrase. It is true that every ratio of exchange is due to the resultant of causes operating on the buyer and seller, and we may classify these as "demand" and "supply." But this fact does not relieve us of the necessity of examining specifically the two sets of causes, including utility in its effect on demand, and cost in its effect on supply. Consequently, when we say that the rate of interest is due to the supply and demand of "capital" or of "money" or of "loans," we are very far from having an adequate explanation. </span></p>\r\n <p class="p4"><span class="s1"><span style="color: #000000;">A version of this article first appeared on</span> <a href="https://conversableeconomist.blogspot.com/2020/08/supply-and-demand-scissors-banana-and.html"><span class="s4">Conversable Economist</span></a>.</span></p>\r\n <div>\r\n <div> </div>\r\n </div> """ -user: Proxies\__CG__\App\Entity\User {#1092 …} -createdAt: DateTime @1597873849 {#1145 : 2020-08-19 21:50:49.0 UTC (+00:00) } -updatedAt: DateTime @1597876870 {#1150 : 2020-08-19 22:41:10.0 UTC (+00:00) } -deletedAt: null -category: App\Entity\Category {#445 …} -status: "published" -imageCard: Proxies\__CG__\App\Entity\File {#1184 …} -ImageHeader: Proxies\__CG__\App\Entity\File {#1184 …} -featured: false -mainView: false -clicks: 4061 -comments: Doctrine\ORM\PersistentCollection {#1125 …} -reviewed_at: DateTime @1597873849 {#1148 : 2020-08-19 21:50:49.0 UTC (+00:00) } -metakey: "Supply and Demand: The Scissors, Banana, and the Parrot" -metadesc: "The time for introducing a fresh group of students to supply and demand is soon to be upon us." -robots: null -publishedAt: DateTime @1597873849 {#1147 : 2020-08-19 21:50:49.0 UTC (+00:00) } -canonical: null -superTag: null } |
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