Ok, we changed the URL to that from <a href="http:&#x2F;&#x2F;www.journals.uchicago.edu&#x2F;doi&#x2F;abs&#x2F;10.1086&#x2F;684231" rel="nofollow">http:&#x2F;&#x2F;www.journals.uchicago.edu&#x2F;doi&#x2F;abs&#x2F;10.1086&#x2F;684231</a>.