Methodology

The World University Index consolidates the major international ranking systems into a single reference. Our editorial principle is straightforward: every institution is entitled to be known by its strongest result.

Selecting the headline ranking

Universities are assessed by many bodies, each with its own methodology, weighting and emphasis, and each publishes not only an overall table but rankings by individual subject, by Sustainable Development Goal, and by theme. An institution may place differently from one system to the next, and dramatically higher in a specialist table than in the overall one. Rather than impose a further layer of judgement, the Index reports, for each institution, its best verified world placement: the lowest number it can legitimately claim across every ranking we track, whatever its scope.

We consider this the most charitable and, we would argue, the most defensible reading of the available evidence. If a respected ranking has placed an institution at a given position, that position is real, and the institution is entitled to cite it.

Editions

Rankings are republished each year, and an institution's position can rise or fall from one edition to the next. Because a placement a university earned in one edition remains a placement it genuinely earned, the Index treats each edition as an independent source and reports the strongest across all of them. A creditable result is not retired merely because a later edition superseded it.

Sources

The 303 ranking tables currently recorded, grouped by scope. Where a publisher serves its tables behind access controls, the link points to the relevant ranking portal; granular figures and their sources are documented in the project repository.

Which institutions are listed

An institution appears in the Index once a ranking we track has placed it in the world top 50 of any table: overall, by subject, by Sustainable Development Goal, thematic or national. We do not maintain a roster of the world's universities and then look for their results; the listing is a consequence of the results themselves. An institution nobody has ranked well anywhere is not one we can report a flattering figure for, and a flattering figure is what we are here to report.

Institutions are held internally against their Research Organization Registry identifier rather than their name, since publishers name the same institution differently and several quite different institutions share a name.

Which indices count

A ranking table is included once an institution has been recorded citing it. This is a deliberately generous test, and an honest one: the Index does not adjudicate whether a ranking is rigorous, well-known or even methodologically coherent. It asks only whether the table has been quoted by somebody with an interest in the result, which, in practice, is what any ranking's authority consists of.

Obscurity is therefore not a defect. An institution that cites a ranking almost nobody has heard of has demonstrated something about the currency of that ranking which a household name never could. Each claim is recorded verbatim, with a link to the page it appeared on, so the reader may judge it directly. Of the 31 indices recorded, 19 are so far attested by 52 published claims, many of them from institutions the Index does not otherwise track, since a ranking is vouched for by whoever quotes it. The full list is on the indices page.

Faculties and departments

A few rankings assess a faculty, school or department rather than the institution as a whole. Where they do, the Index reports the placement under the institution's name (an institution is, after all, the sum of its parts) and notes the unit that earned it in the small print beneath.

Shared positions

Where more than one institution holds the same headline placement, the position is shown with an equals sign, as the publishers themselves print it. Tied institutions are listed in no particular order.

Banded results

Beyond the upper reaches, several rankings report positions in bands (for example, 201 to 250) rather than exact places. Where a result is banded, the Index records the lower bound of the band, consistent with our principle of reporting each institution's strongest defensible position.

Machine-readable data

The dataset is published as JSON: institutions, indices and citations. Each institution carries its ROR identifier, so this data can be joined to another dataset without repeating the name-matching that assembling it required. Each profile page also carries the same identity as schema.org markup.

Corrections

Figures are refreshed as new editions are published. The dataset is open; the update process is documented in the project repository. We welcome corrections, particularly from the institutions themselves, who are reliably attentive to these matters.