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 {#3674 -links: [ 3795 => Symfony\Component\WebLink\Link {#3795 -href: "/build/runtime.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3793 => Symfony\Component\WebLink\Link {#3793 -href: "/build/644.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3792 => Symfony\Component\WebLink\Link {#3792 -href: "/build/502.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3791 => Symfony\Component\WebLink\Link {#3791 -href: "/build/app.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3790 => Symfony\Component\WebLink\Link {#3790 -href: "/build/view-more.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3789 => Symfony\Component\WebLink\Link {#3789 -href: "/build/term-condition.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3788 => Symfony\Component\WebLink\Link {#3788 -href: "/build/contact.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3787 => Symfony\Component\WebLink\Link {#3787 -href: "/build/scroll-infinite-article.js" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "script" ] } 3786 => Symfony\Component\WebLink\Link {#3786 -href: "/build/app.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } 3785 => Symfony\Component\WebLink\Link {#3785 -href: "/build/cookie-style.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } 3784 => Symfony\Component\WebLink\Link {#3784 -href: "/build/term-condition-css.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } 3783 => Symfony\Component\WebLink\Link {#3783 -href: "/build/contact-css.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } 3782 => Symfony\Component\WebLink\Link {#3782 -href: "/build/comment-css.css" -rel: [ "preload" => "preload" ] -attributes: [ "as" => "style" ] } ] } |
_route | "article_show" |
_route_params | [ "category" => "global-economy" "slug" => "left-number-bias-what-firms-haven-t-quite-figured-out" ] |
_security_firewall_run | "_security_main" |
_stopwatch_token | "03c74e" |
category | "global-economy" |
slug | "left-number-bias-what-firms-haven-t-quite-figured-out" |
Request Headers
Header | Value |
---|---|
accept | "*/*" |
accept-encoding | "gzip, br, zstd, deflate" |
connection | "close" |
cookie | "PHPSESSID=kdtl3pvbo4178u46rb8ocvcev7; care_did=1820b277-0db3-4b80-8218-ec4dfb187504" |
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 13:35:19 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 | "f7424b" |
Cookies
Request Cookies
Key | Value |
---|---|
PHPSESSID | "kdtl3pvbo4178u46rb8ocvcev7" |
care_did | "1820b277-0db3-4b80-8218-ec4dfb187504" |
Response Cookies
No response cookies
Session 6
Session Metadata
Key | Value |
---|---|
Created | "Sat, 22 Feb 25 13:35:16 +0000" |
Last used | "Sat, 22 Feb 25 13:35:18 +0000" |
Lifetime | 0 |
Session Attributes
Attribute | Value |
---|---|
_csrf/https-comment | "1KYBTSXB5XzLJA9b8weI9-BUFmH4ZrSLmMfmn-Dubac" |
_csrf/https-cookie_accept | "4kB6DA1HQ_QvRCQE0z1D9ck7OqMeG0zc7qt0j5nXOOo" |
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: 5614 -title: "Left-Number Bias: What Firms Haven't Quite Figured Out" -slug: "left-number-bias-what-firms-haven-t-quite-figured-out" -introtext: "<p><span style="color: #000000;">"Left- number bias" refers to when people focus on the left-hand number--and thus, why so many prices in stores take the form of $X and 99 cents, rather than rounding up that extra penny. </span></p>\r\n" -content: """ \r\n <p><span style="color: #000000;">Avner Strulov-Shlain offers some additional evidence on this well-known phenomenon and then draws out some lesser-known implications in <span style="color: #808080;"><a style="color: #808080;" href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3413019">"More than a Penny's Worth: Left-Digit Bias and Firm Pricing" </a>(</span>December 2019, Chicago Booth Research Paper No. 19-22). The <span style="color: #808080;"><a style="color: #808080;" href="https://review.chicagobooth.edu/marketing/2019/article/many-retailers-are-making-basic-mispricing-mistake">Chicago Booth Review</a><a style="color: #808080;" href="https://review.chicagobooth.edu/marketing/2019/article/many-retailers-are-making-basic-mispricing-mistake"> offers a short readable overview here</a></span>.</span><br /><br /><span style="color: #000000;">Strulov-Shlain estimated demand curves for products. However, in the model he uses, raising price by a certain amount (say, by a penny or a dime) are allowed to have a bigger effect when it changes the left-hand dollar value than when it doesn't change the left-hand dollar value. He writes: </span></p>\r\n <div><span style="color: #000000;">"To estimate demand, I use a sample of 1710 popular products in 248 stores of a single US retailer over 3.5 years, and another sample of 12 products in AC Nielsen RMS data across more than 60 chains and 11,000 stores, over 9 years. ... I find that consumers are biased, to the extent of treating a 1 cent increase from a 99-ending price as if it were a 15-25 cent increase. Next, I estimate retailer pricing behavior. .. Firms seem to underestimate the magnitude of the bias significantly. From the firm’s perspective, I estimate that they act as if a 99-ending price is treated by consumers as being only 1.5-3 cents lower than the round price. ... I find that firms do better than pricing as if there is no bias at all, but not half as good as possible. I estimate that they lose 1%-3% of gross profits, or $60 million annual revenue on regular price sales."</span></div>\r\n <div><span style="color: #000000;"></span></div>\r\n <div><span style="color: #000000;">The underlying logic here is how firms should read to a strong left-number bias. For example, no prices should be set at an even dollar amount, because if a firm was to cut that price by a single penny, so that it instead ended with 99 cents, consumers would react as if the price had been cut by 15-25 cents, and the resulting increase in sales will more than make up for the small price cut. Indeed, pushing this logic a little further, firms should not set prices at some amount not far above the even-dollar amount, either. For example, consider a price of $3.29. If that price is cut to $2.99, then consumers will react to the actual price cut of 30 cents, plus an additional 15-25 cents for changing the left-hand digit. Again, the increase in quantity sold as a result of this price cut should (for most products) lead to an increase in profits. </span></div>\r\n <div><span style="color: #000000;"></span></div>\r\n <div><span style="color: #000000;">So why don't we see even more prices ending in 99 cents than we already do? Maybe the model used by Strulov-Strain misses some important factor; for example, perhaps if even more prices were set to end in 99 cents, then some of the left-number bias might wear off. Or perhaps it just seems to retailers too aggressive and risky to, say, cut prices from $3.29 to $2.99. </span></div>\r\n <div><span style="color: #000000;"></span></div>\r\n <div><span style="color: #000000;">In another paper, Strulov-Strain looks at the effects of a law in Israel that required all prices to be set "to the dime"--that is, you could end a price with 90 cents, but not 99 cents. If the US eliminated pennies and nickels as currency, this would in effect be the result for retailers. He writes: "Before the reform about 40%-50% of prices ended with 99, suggesting substantial levels of perceived and actual [left-hand number] bias." When the law passed, a lot of firms reacted at first by pushing the prices that ended with 99 up to 00. But this didn't last, and within 6-12 months Israeli firms were ending their prices with 90, presumably again because of left-hand number bias. </span></div>\r\n <div>\r\n <div><span style="color: #000000;"></span></div>\r\n </div>\r\n <div><span style="color: #000000;">For another study on left-number bias, see this discussion of <a style="color: #000000;" href="http://conversableeconomist.blogspot.com/2011/10/left-number-bias-in-used-car-prices.html">"<span style="color: #808080;">Left Number Bias in Used Car Prices" (October 4, 2011</span>)</a>, which looks at how prices for used cars drop more sharply depending on the left-hand numbers on the mileage on the car. Or here's a discussion of the related phenomenon of "round number" bias, in <span style="color: #808080;"><a style="color: #808080;" href="http://conversableeconomist.blogspot.com/2013/10/one-million-page-views-and-round-number.html">"One Million Page Views and Round Number Bias"</a></span> (October 18, 2013). </span></div>\r\n <div> </div>\r\n <div><span style="color: #000000;">A version of this article first appeared on <span style="color: #808080;"><a style="color: #808080;" href="http://conversableeconomist.blogspot.com/2020/02/left-number-bias-what-firms-havent.html" target="_blank" rel="noopener">Conversable Economist</a></span>. </span></div> """ -user: Proxies\__CG__\App\Entity\User {#1092 …} -createdAt: DateTime @1582842108 {#1145 : 2020-02-27 22:21:48.0 UTC (+00:00) } -updatedAt: DateTime @1582842264 {#1150 : 2020-02-27 22:24:24.0 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: 2016 -comments: Doctrine\ORM\PersistentCollection {#1125 …} -reviewed_at: DateTime @1582842108 {#1148 : 2020-02-27 22:21:48.0 UTC (+00:00) } -metakey: "" -metadesc: ""Left- number bias" refers to when people focus on the left-hand number--and thus, why so many prices in stores take the form of $X and 99 cents, rather than rounding up that extra penny.\u{A0}" -robots: null -publishedAt: DateTime @1582842108 {#1147 : 2020-02-27 22:21:48.0 UTC (+00:00) } -canonical: null -superTag: null } |
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