In the context of exercises such as the UK REF there have also been discussions about the possibility to use citations as a proxy for quality. Indeed, there are substantial correlations between peer review results and citations, but this depends on the level of aggregation. At the individual paper level the correlation is typically low, yet at higher levels, such as institutional, the correlations are substantially higher [@traag_metrics_2023]. Overall, as summarised in the reputable "Metrics Tide" report [@wilsdon_metric_2015, viii], "Metrics should support, not supplant, expert judgement.", and this is particularly relevant at the individual paper level.
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