CHIZU — the atlas of coffee research
Coffee research in Liberia
Two limits come with this count. Only 100,474 of the 190,643 searchable papers (52.7%) carry an author affiliation country. The other 90,169 (47.3%) carry none. So that single paper is 1 out of the 100,474 whose affiliation is known. And a co-authored paper is counted once for every country its authors sit in. Per-country counts therefore do not add up to the whole.
Liberia is a coffee-producing country.
That one paper is not coffee research. It is here because its title contains “Mount Coffee” — a place name in Liberia (a hydropower scheme). So within this index, coffee research from Liberia is effectively zero. We count words in titles, so place names and personal names can slip in. When we find one, we say so.
Check it yourself
This is not our word for it. You can run the same query against the same index.
When they were written
A single paper, from 2020.
Years before 1600 are treated as unknown. The upstream data (OpenAlex) sometimes writes 1400 when the year is missing, and that is a placeholder, not a measurement.
Where they appeared
Source (journal or repository)
Most cited
That is the only one. There are no others.
Which stage of coffee
Only 30.2% of the whole index carries a stage label. None of this country's 1 papers carries one.
Which field
Only 75.9% of the whole index carries a field label. Of this country's 1 papers, 1 carry one. The breakdown below is about those 1 papers only — the rest were never candidates for it.
One paper can carry several labels, so the breakdown adds up to more than that number.
What language
"undetermined" means the upstream record carried no language. We did not guess one.
Knowledge is not evenly spread
Counting only papers whose author affiliation is known, the largest is Indonesia with 22,248. Liberia has 1 — a factor of 22,248.
That gap does not follow where coffee is grown. Research gathers where the means to do research are, not where the coffee is. Making that visible is why CHIZU exists.
Other countries
Indonesia 22,248United States 17,988Brazil 10,857United Kingdom 5,569China 4,887India 3,542Germany 3,185Italy 3,111France 3,072Japan 2,822Colombia 2,489Spain 2,363