#loi_de_puissance

Lotka-Volterra c’est fini
▻http://www.sciencemag.org/content/349/6252/aac6284

Across ecosystems globally, pyramid structure becomes consistently more bottom-heavy, and per capita production declines with increasing biomass. These two ecosystem-level patterns both follow power laws with near ¾ exponents and are shown to be robust to different methods and assumptions.

#recherche #écologie #écosystèmes #proie-prédateur #loi_de_puissance

(une version plus digeste (?) ici ▻https://www.washingtonpost.com/news/energy-environment/wp/2015/09/03/researchers-may-have-just-stumbled-upon-a-mathematical-secret-to-how)

The Economics of Blogging and The Huffington Post - Nate Silver
▻http://fivethirtyeight.blogs.nytimes.com/2011/02/12/the-economics-of-blogging-and-the-huffington-post

If the case that The Huffington Post were making to its bloggers were a little more frank, along the lines of the following:

Sure, we’d love for you to post here. And there’s the chance that your post could do very well. But odds are that only a few hundred people will see it, and we’ll be lucky to sell enough ads on it to afford a slice of pizza.

…there might be fewer complaints that it doesn’t pay its bloggers. But promises of a huge audience are what persuade people to blog at The Huffington Post rather than somewhere else.

#Loi_de_puissance #publicité #web

via @nathangeffen

Half of all app store revenue goes to just 25 developers • The Register
▻http://www.theregister.co.uk/2012/12/04/top_25_app_devs_earn_half_of_revenue

#Apple's #App_Store and the #Google_Play_store each claim to offer over 700,000 apps to choose from, but only a tiny fraction of them bring in significant revenue for their developers, according to research from analyst firm Canalys.

In fact, the company says, of the $120m in total revenue generated from paid app downloads and in-app purchases in the US during the first 20 days of November 2012, fully half was split between just 25 developers.

#mobile #app #loi_de_puissance #économie #attrape_gogos #jeux_vidéo