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Dears, I am wondering on who decides the Impact Factor of a journal? I am a writer, reader, and editor myself and consequently come across several papers. What surprises me though has to do with the inconsistency of ratings. The Ethiopian Journal of Health Development, one of the best in the country is rated low despite all the good work the journal has done over the years. I checked all the indicators and I believe the journal deserves more rating. So, I wish to hear from whoever is involved in rating journal.

Appreciate genuine and positive response

Mirgissa Kaba (PhD)

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    No one decides. It is calculated (see researchgate.net/post/How_is_impact_factor_calculated). Note that a huge number of senior researchers don't believe in it as a quality criterion but they use it to advertise their scientific achievements. The impact factor in 2018, for example, is computed as: (Citations in 2017 + Citations in 2016) / (Publications in 2017 + Publications in 2016). For more details, please see en.wikipedia.org/wiki/Impact_factor – Younes Aug 13 '19 at 7:28
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    I am voting to close this question. The Wikipedia page has a detailed explanation: en.wikipedia.org/wiki/Impact_factor – Dirk Aug 13 '19 at 7:53
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    Just by hazard, are you the editor of that journal? – Solar Mike Aug 13 '19 at 7:54
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    @Younes That's only partially true: it's calculated, but ISI decides what counts as a "citation" and what doesn't, in an arbitrary and non-verifiable process. This is described in the Wikipedia page you cited. – Federico Poloni Aug 13 '19 at 8:35
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    @solar-mike "Mirgissa Kaba" is indeed listed as the Editor-in-Chief of the Ethiopian Journal of Health Development. – iayork Aug 13 '19 at 14:11
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The impact factor isn't necessarily a measure of usefulness or how much good a journal has done; it's calculated by a mathematical formula related to the number of citations and articles that journal has released. No one individual or organisation decides on the impact factor of a journal.

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