Archive for Ranking

The Meaningless University Rankings

Posted in Education with tags , , , on September 29, 2023 by telescoper
Photo by Pixabay on Pexels.com

I see that the Times Higher has now released this year’s outcomes of its annual exercise in numerology called the World University Rankings. The announcement is accompanied by narratives such as this:

China is edging closer to the top 10 and now has two institutions in the top 15 for the first time. Tsinghua and Peking universities both overtake the University of PennsylvaniaJohns Hopkins University and Columbia University to rank 12th and 14th respectively in this year’s 20th edition of the ranking. Meanwhile, Japan’s University of Tokyo now outperforms the University of EdinburghKing’s College London and the London School of Economics and Political Science, after rising 10 places to 29th.

Blah Blah Blah.

Such statements are rendered even more meaningless than they usually are by the fact that this year’s (2024) rankings are constructed using a very different methodology from previous years. How do we know, then, that the changes in rank described above are due simply to a change in methodology?

The answer is that we don’t.

As I pointed out last week, it would be a very simple task to answer that question. All the Rankers need to do is run last year’s methodology using this year’s data and/or last year’s methodology with this year’s data, and compare the result with this year’s rankings. Any differences so produced would demonstrate whether or not the methodology is more important that the data. This is the sort of test that anyone with a basic knowledge of the scientific method would perform. Over the years I’ve asked the Times Higher many times to do this exercise and they have always refused.

My theory is that actual institutional changes take place much more slowly, over a much longer timescale than a year. These rankings would be much harder to sell, and to construct commentaries that sell, if the rankers if nothing much happened between, say 2023 and 2024. That’s why they shake up the methodology every few years, to make it look like something is happening with which their “journalists” can fill column inches.

It seems to me a reasonable inference that the Times Higher doesn’t really care whether the results of its annual Rankfest actually mean anything or not. They just want to peddle the results to the world’s bureaucrats and politicians who lap it all up unquestioningly. Unfortunately the people in and around universities who make strategic decisions often believe this sort of nonsense and hold quite a lot of power, so the league tables aren’t merely irrelevant garbage – they’re potentially dangerous garbage.

Hats off, then, to Utrecht University in the Netherlands who have refused to participate in this year’s rankings. I quote:

UU has chosen not to submit data. A conscious choice:

  • Rankings put too much stress on scoring and competition, while we want to focus on collaboration and open science.
  • In addition, it is almost impossible to capture the quality of an entire university with all the different courses and disciplines in one number.
  • Also, the makers of the rankings use data and methods that are highly questionable, research shows.

Quite so. More of this please!

An Open Letter to the Times Higher World University Rankers

Posted in Bad Statistics, Education with tags , , , , , , on September 20, 2023 by telescoper

Dear Rankers,

I note with interest that you have announced significant changes to the methodology deployed in the construction of this years forthcoming league tables. I would like to ask what steps you will take to make it clear to that any changes in institutional “performance” (whatever that is supposed to mean) could well be explained simply by changes in the metrics and how they are combined?,

I assume, as intelligent and responsible people, that you did the obvious test for this effect, i.e. to construct and publish a parallel set of league tables, with this year’s input data but last year’s methodology, which would make it easy to isolate changes in methodology from changes in the performance indicators.  This is a simple test that anyone with any scientific training would perform.

You have not done this on any of the previous occasions on which you have introduced changes in methodology. Perhaps this lamentable failure of process was the result of multiple oversights. Had you deliberately withheld evidence of the unreliability of your conclusions you would have left yourselves open to an accusation of gross dishonesty, which I am sure would be unfair.

Happily, however, there is a very easy way to allay the fears of the global university community that the world rankings are being manipulated. All you need to do is publish a set of league tables using the 2022 methodology and the 2023 data. Any difference between this table and the one you published would then simply be an artefact and the new ranking can be ignored.

I’m sure you are as anxious as anyone else to prove that the changes this year are not simply artificially-induced “churn”, and I look forward to seeing the results of this straightforward calculation published in the Times Higher as soon as possible, preferably next week when you announce this years league tables.

I look forward to seeing your response to the above through the comments box, or elsewhere. As long as you fail to provide a calibration of the sort I have described, this year’s league tables will be even more meaningless than usual. Still, at least the Times Higher provides you with a platform from which you can apologize to the global academic community for wasting their time and that of others.