Add 2019 study

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Jay Graber 2020-06-08 11:49:09 -07:00
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@ -42,6 +42,10 @@ Some documented [challenges with moderation in Mastodon](https://nolanlawson.com
There is [no unified global search in Mastodon](https://github.com/tootsuite/mastodon/issues/9529), as each server monitors a different set of messages. Searching for the same keyword on different instances yields different results. The federated timeline shows public posts that the user's server knows about. Essentially, users have access to posts of people followed by people on their instance.
Mastodon users are presented with three timelines: a home timeline with posts from accounts the user follows, a local timeline with posts from the local instance, and a federated timeline with all posts that have been retrieved from remote instances.
A [2019 analysis](https://emilianodc.com/PAPERS/mastodonIMC19.pdf) of the Mastodon ecosystem found that the majority of posts are concentrated on a few instances, and outages in 10 instances would remove almost half of all posts from the network.
Mastodon's interface has a "Profile Directory" tab, where users can browse recently active profiles or new arrivals from both their own instance or the fediverse to discover who to follow. Users can select featured hashtags to be displayed on their public profile so people can browse their posts by hashtag.
### Privacy and Access Control