Corrado Gini, Italian sociologist and demographer (d. 1965)
Corrado Gini (23 May 1884 – 13 March 1965) was an Italian statistician, demographer and sociologist who developed the Gini coefficient, a measure of the income inequality in a society. Gini was a proponent of organicism and applied it to nations.

1884May, 23
Corrado Gini
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Events on 1884
- 27Mar
Cincinnati riots of 1884
A mob in Cincinnati, Ohio, attacks members of a jury which had returned a verdict of manslaughter in what was seen as a clear case of murder; over the next few days the mob would riot and eventually destroy the courthouse. - 20Apr
Humanum genus
Pope Leo XIII publishes the encyclical Humanum genus. - 14Oct
Photographic film
American inventor George Eastman receives a U.S. Government patent on his new paper-strip photographic film. - 22Oct
Prime meridian (Greenwich)
The Royal Observatory in Britain is adopted as the prime meridian of longitude by the International Meridian Conference. - 10Dec
Adventures of Huckleberry Finn
Mark Twain's Adventures of Huckleberry Finn is published.