Timeline for How is the Herfindahl-Hirschman index different from entropy?
Current License: CC BY-SA 4.0
16 events
| when toggle format | what | by | license | comment | |
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| Mar 19, 2021 at 4:36 | comment | added | innisfree | Surely one of the biggest differences will be additivity: the entropy for two independent things just sums. The HHI won’t have that property | |
| Apr 21, 2020 at 16:21 | comment | added | Nick Cox | Although early schooling and general practices make many people immediately realise that $\sum p \log(1/p) = \sum -p \log p$ and then $- \sum p \log p$, I find some pedagogical advantage in writing $\sum p \log(1 / p)$ which allows emphasis on entropy as a weighted average. | |
| Apr 21, 2020 at 15:45 | answer | added | Ben | timeline score: 1 | |
| Apr 21, 2020 at 15:25 | comment | added | bjarkemoensted | I'm a physicist though, so much more familiar with entropy. Still rusty enough to be confused over them seemingly measuring the same thing qualitatively, yet being different. The paper linked in Kristian's answer was quite helpful in explaining this. | |
| Apr 21, 2020 at 12:15 | comment | added | Nick Cox | The Wikipedia entry looks good for economists; but even with some wider references it underplays the extent to which this has many, many names and a longer history than stated, but it is neither possible nor appropriate to try a fuller account here. | |
| S Apr 21, 2020 at 8:10 | history | bounty ended | bjarkemoensted | ||
| S Apr 21, 2020 at 8:10 | history | notice removed | bjarkemoensted | ||
| Apr 21, 2020 at 8:10 | vote | accept | bjarkemoensted | ||
| Apr 21, 2020 at 6:46 | answer | added | kjetil b halvorsen♦ | timeline score: 4 | |
| Apr 21, 2020 at 6:43 | answer | added | Flounderer | timeline score: 2 | |
| Apr 21, 2020 at 0:00 | history | tweeted | twitter.com/StackStats/status/1252386568091779074 | ||
| Apr 20, 2020 at 20:13 | answer | added | Kristian Georgiev | timeline score: 2 | |
| Apr 20, 2020 at 7:59 | history | edited | kjetil b halvorsen♦ |
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| S Apr 20, 2020 at 7:36 | history | bounty started | bjarkemoensted | ||
| S Apr 20, 2020 at 7:36 | history | notice added | bjarkemoensted | Draw attention | |
| Apr 15, 2020 at 11:46 | history | asked | bjarkemoensted | CC BY-SA 4.0 |