1.0Policy Optionshttps://policyoptions.irpp.org/fr/rich600338<blockquote class="wp-embedded-content" data-secret="Rc4mSjrxcP"><a href="https://policyoptions.irpp.org/fr/2015/01/thibert/">Beware the collaboration trap</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://policyoptions.irpp.org/fr/2015/01/thibert/embed/#?secret=Rc4mSjrxcP" width="600" height="338" title="“Beware the collaboration trap” — Policy Options" data-secret="Rc4mSjrxcP" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); </script> https://policyoptions.irpp.org/wp-content/uploads/2025/08/thibert.jpg500281The academic debates in urban studies around metropolitan regions and their evolution are yet again focusing on defining the object of study. Recent contributions to the field suggest that the entity of the city-­region may be a thing of the past—if it ever existed. Most large agglomerations have not a centre and a periphery but […]