I have been editing Wikipedia since 2003. Recent changes and my watchlist seem to consume most of my mainspace time, but I also enjoy piecemeal additions of well-referenced information.

I have long appreciated the Signpost, the English Wikipedia's community-edited weekly newspaper (having commended its journalist values as early as 2005 during a discussion on de:). I started contributing to the Signpost myself in 2009, and from June 2010 to July 2011 acted as its editor-in-chief. I still edit its monthly report on recent academic research about Wikipedia, which is also published separately as the Wikimedia Research Newsletter, and co-edit the associated @WikiResearch Twitter feed.

More Meta

Other material about Wikipedia and related topics:

• "Timeline of distributed Wikipedia proposals": A survey of the - surprisingly frequent but as yet inconsequential - proposals for some kind of distributed Wikipedia (abolishing the principle that there is only one current article version for each topic), and more specifically, proposals to apply the principles of distributed revision control (as exemplified by Git in software development) to wikis in general and Wikipedia in particular.
• "Which parts of an article are actually being read?" (slides from a talk at Wikimania 2018), see also Meta-wiki page
• "Readership metrics: Trends and stories from our global traffic data" (slides from a talk at Wikimania 2017)
• "What the Wikimedia Foundation does" (slides from a talk at Wikimania 2016)
• "Failures that made us better: A brief history of the Wikimedia Foundation as a learning organization" (slides from a talk at Wikimania 2015)
• "Editor surveys"(slides from a talk at Wikimania 2013)
• "'Stop Spamming' vs. 'Nobody Told Me' - the state and future of movement broadcasting mechanisms" (slides from a talk at Wikimania 2012)
• "Academic research about the reliability of Wikipedia" (slides from a talk at a zhwiki meetup, January 2012)
• "Lessons from Citizendium": Talk at Wikimania 2009 (abstract, slides and notes), advocating a Wikipedians' view on Citizendium not as a rival, but as a valuable testing ground for several policy changes. Examining the problems with one of them gave rise to a list of errors in Citizendium's expert-approved articles.
• "Privacy, openness, trust and transparency on Wikipedia. How the free encyclopedia project deals with sockpuppets", related talk at 26C3, 2009 (abstract, slides and notes)
• "CheckUser and Editing Patterns - Balancing privacy and accountability on Wikimedia projects": Talk at Wikimania 2008 (abstract,slides and notes)

From 2011 to 2019 I worked for the Wikimedia Foundation, most recently as a senior data analyst.

Disclaimer: I worked for or provided services to the Wikimedia Foundation, but this is my personal account. Edits, statements, or other contributions made from this account are my own, and may not reflect the views of the Foundation.

I was known as "User:High on a tree" from December 2003 to June 2008, when I changed my user name to "HaeB" ("High on a tree" initialismized in German) for consistency with my nick on de:, and to save bandwidth ;-)

I was a CheckUser on de: from July 2006 until October 2011 (I decided not to run for reelection after starting to work for WMF). I am also active on Commons.