Why is Penn ranked 4th in US News rankings?

<p>Do you think the magazine editor would really have that much influence over the rankings? I found this on the webpage with the actual ranks:</p>

<p>
[quote]
Appeared in a different category of schools last year. The school was reclassified by the Carnegie Foundation in 2004.
N/A means that the data were not provided by the school.

[/quote]
</p>

<p>Here's the link: <a href="http://www.usnews.com/usnews/edu/college/rankings/brief/natudoc/tier1/t1natudoc_brief.php%5B/url%5D"&gt;http://www.usnews.com/usnews/edu/college/rankings/brief/natudoc/tier1/t1natudoc_brief.php&lt;/a&gt;&lt;/p>

<p>It's a little excerpt on the bottom.</p>

<p>Does that mean that the Carnegie Foundation was more affiliated with the ranks?!</p>

<p>I don't want to make a big deal out of this, but I'm just curious of why this is!</p>