Do Citations Matter to University Rankings, and Why?

Why Do University Rankings Care How Often Research Is Cited?

A university publishes hundreds or thousands of research outputs. Some attract little scholarly attention. Others are repeatedly referenced by researchers around the world. Global university rankings such as QS and Times Higher Education use this difference as part of their assessment of institutional research performance.

At first glance, the logic seems straightforward. If other researchers cite a paper, perhaps the work influenced subsequent scholarship. Accumulate those citations across an institution and the resulting data appear to offer a scalable way of comparing research influence across universities.

But citations are more complicated than votes for research quality. Researchers cite work for different reasons, disciplines have radically different citation cultures, older publications have had more time to accumulate citations, and highly cited research is not necessarily correct, rigorous, or socially important.

Citations matter to rankings because they provide useful bibliometric signals. Understanding what those signals do and do not mean is essential before universities begin treating citation growth as a research objective.

Citations Matter Because Rankings Use Them as Evidence of Scholarly Reach and Influence

A Citation Is Useful Evidence, but It Is Not a Quality Certificate

What Is a Citation?

A citation occurs when one scholarly work references another. Researchers cite previous literature to acknowledge intellectual foundations, identify evidence, position an argument, discuss methods, compare findings, challenge earlier claims, or provide readers with relevant sources.

Citation counts can therefore indicate that research has entered subsequent scholarly communication. A paper repeatedly cited by other researchers has, at minimum, become visible enough to be referenced within later work.

This makes citations attractive to global ranking systems. Unlike many dimensions of university activity, bibliometric data can be collected at large scale across institutions and countries.

Why Rankings Use Citation Indicators

University rankings need ways to distinguish institutions whose research is not merely produced but also interacts with the wider scholarly literature. Citation data provide one such signal.

A publication count answers, approximately, “How much scholarly output was produced under this definition?” A citation indicator asks a different question: “How much scholarly referencing did those outputs receive, relative to the way this ranking calculates the measure?”

Neither tells the entire story of research performance, but they represent different dimensions.

QS Assigns 20% to Citations per Faculty

In the current QS World University Rankings methodology, Citations per Faculty contributes 20% of the overall institutional score. It sits alongside Academic Reputation, weighted at 30%, within the Research and Discovery lens.

QS describes Citations per Faculty as measuring the relative intensity and volume of research at an institution. The citation total is divided by the number of faculty members to account for differences in institutional size.

This denominator is important. QS is not simply ranking universities according to total citations. Two institutions with similar citation totals can receive different performance because their faculty populations differ.

THE Uses Citations Across Four Research Quality Indicators

Times Higher Education uses a more disaggregated citation-based model in its World University Rankings 2026. The Research Quality pillar contributes 30% of the overall score and contains four indicators.

Consequently, saying that “citations are worth 30% in THE” is directionally useful but incomplete. The 30% Research Quality pillar contains several distinct measures derived from citation relationships rather than one citation count.

QS and THE Therefore Reward Citation Performance Differently

QS's flagship methodology concentrates citation measurement in Citations per Faculty. THE asks several questions about the distribution and character of citation performance.

This difference helps explain why an institution can perform strongly on citation-related measures in one ranking without receiving an identical result in the other. The rankings may begin with overlapping bibliometric information, but their formulas, normalization procedures, denominators, and indicator structures differ.

This is one of the central distinctions in how QS and THE research indicators differ.

Field Normalization Is Necessary Because Disciplines Cite Differently

A raw citation comparison between disciplines can be badly misleading. Biomedical and some natural-science fields commonly generate large volumes of journal literature and citations. Other disciplines may publish less frequently, use books or other outputs more extensively, or accumulate citations more slowly.

Ranking systems therefore use normalization procedures intended to make citation performance more comparable across subject areas.

THE explicitly normalizes citation data to reflect disciplinary differences. Its Research Excellence measure is normalized by year, subject, and staff numbers, while other research-quality measures also account for disciplinary citation patterns.

QS likewise applies methodological procedures to address differences in citation intensity among subject areas within Citations per Faculty.

Subject Rankings Make the Disciplinary Problem Particularly Visible

THE recalibrates its subject-ranking weights according to disciplinary research cultures. In the 2026 subject methodology, Citation Impact carries 7.5% in Arts and Humanities but 17.5% in several science-oriented subject rankings.

THE explicitly explains that Arts and Humanities receives less citation weight because scholarly outputs in those disciplines extend well beyond peer-reviewed journal articles.

This is an important reminder that the significance of citations depends partly on how knowledge is communicated within a field.

More Publications Can Create More Opportunities to Be Cited, but That Is Not the Whole Formula

Increasing research output increases the number of publications that could potentially receive citations. That can matter, especially if the additional work is subsequently used by other researchers.

But publishing twice as many papers does not guarantee twice as many useful citations or a better normalized citation score. Additional publications that receive few citations can interact with averages, distributions, faculty denominators, and ranking-specific formulas in ways that are not captured by simple output growth.

This is why producing more research does not automatically improve a university's ranking.

Highly Cited Research Can Improve Ranking Performance Disproportionately

Citation distributions are highly skewed. A relatively small proportion of publications can receive a large share of citations. This means an institution's citation profile may be influenced substantially by particularly visible or influential papers.

THE's Research Excellence indicator explicitly examines publications within the top 10% worldwide by field-weighted citation impact. Its Research Strength indicator uses the 75th percentile rather than relying only on the mean.

These measures partly address the fact that a single average can conceal very different distributions of research performance.

International Collaboration Can Affect Citation Patterns

Internationally collaborative research can sometimes achieve greater visibility and citation reach, although the relationship depends on field, partners, topic, and other factors. Large collaborative papers may also accumulate substantial citations.

Ranking systems separately recognize aspects of international research. QS assigns 5% to International Research Network, while THE assigns 2.5% to International Collaboration.

Universities should not respond by adding international co-authors merely to pursue citation or ranking advantages. Collaboration is most defensible when partners contribute expertise, infrastructure, populations, data, or perspectives needed for the research.

Citations Do Not Tell You Why a Paper Was Cited

A citation is not necessarily an endorsement. Researchers may cite a study because they use its findings, adopt its method, disagree with its conclusions, identify it as an example of a problem, or need to position their own work relative to it.

A citation count usually does not distinguish among these functions.

This limitation becomes important when citation totals are casually translated into statements such as “this paper is better because it has more citations.” The count establishes scholarly referencing, not the reason for that referencing.

Citations Are Not the Same as Research Quality

Research quality involves characteristics such as methodological rigor, transparency, credibility, appropriate analysis, significance, originality, and fitness for purpose. Citation counts do not directly measure these properties.

DORA's guidance on quantitative indicators emphasizes that no single indicator can capture the complexity of research quality and recommends that quantitative measures be used clearly, transparently, specifically, contextually, and fairly.

The concepts can be associated without being interchangeable. Excellent research can remain lightly cited, and highly cited work can later be criticized, corrected, or even retracted.

Citations Are Not the Same as Societal Impact

Research may influence clinical practice, education, public policy, engineering, industry, communities, culture, or public understanding without accumulating a large scholarly citation record.

Conversely, a highly cited methodological or theoretical paper may have substantial scholarly influence while producing no direct measurable societal change.

Citation impact and societal impact should therefore be kept conceptually separate.

Database Coverage Affects What Becomes Visible

Ranking bibliometrics depend on the publications indexed by the data source being used. QS and THE rely substantially on Scopus data for their flagship ranking bibliometrics.

Research published in sources not adequately represented in the database may be less visible to the ranking methodology. This can particularly matter for books, local or regional journals, non-English scholarship, and disciplines whose publication cultures differ from journal-intensive sciences.

Database coverage therefore influences the research universe that a ranking can observe.

Citation Windows Matter

Publications need time to accumulate citations. Ranking organizations therefore define publication and citation windows.

For THE's World University Rankings 2026, the bibliometric dataset includes relevant publications from 2020 through 2024 and citations to those publications collected across 2020 through 2025.

Different ranking editions and organizations can use different windows. A newly published article may be excellent but have had insufficient time to generate substantial citation evidence within the ranking period.

Self-Citation and Extreme Citation Patterns Require Methodological Handling

Bibliometric systems must contend with unusual citation patterns, including very highly cited papers and forms of citation concentration. Ranking methodologies can therefore apply exclusions, normalization, or other technical procedures to prevent exceptional cases from dominating results inappropriately.

Institutions should not infer these technical rules from general descriptions. The current methodology of the ranking should be consulted when precise institutional analysis is required.

The Better Strategic Question Is Why Research Is or Is Not Being Used

If an institution's research receives relatively little citation attention, the appropriate response is not automatically to demand more citations from researchers.

The institution can investigate several possibilities. Is the research addressing questions relevant to active scholarly conversations? Is it being published where relevant audiences can find it? Are titles, abstracts, keywords, metadata, and researcher identities discoverable? Are outputs accessible? Does the institution participate in appropriate research networks? Are disciplinary citation patterns being interpreted correctly?

Improving genuine research visibility and usefulness is more defensible than treating citations as a quota.

More Papers and More Citations Can Produce Different Ranking Stories

The example does not prove that University B's research is inherently better. It shows that the research has produced a different citation profile and that ranking systems can reward that difference.

To make a claim about research quality, additional evidence concerning the research itself would still be necessary.

Common Misunderstandings About Citations and Rankings

Improve Research Visibility and Usefulness, Not Citation Counts in Isolation

For researchers, citation performance is best treated as one possible signal of scholarly use rather than the purpose of research. For institutions, citation indicators can identify patterns worth investigating, but they should not be converted automatically into individual citation quotas.

The distinction is particularly important when deciding whether research quality or quantity matters more in university rankings. Citation-based indicators are one reason simply counting papers cannot answer that question.

Before Interpreting a University's Citation Performance, Check the Context

Questions About Citations and University Rankings

Citations Matter to Rankings Because They Signal Scholarly Use, Not Because They Prove Quality

How to Cite This Guide

This guide is intended to be read, shared, and used in research, teaching, and academic work. If you draw on its ideas, explanations, or other content, please acknowledge the source by citing the guide. Doing so gives appropriate credit and helps your readers locate the original resource.