As a writer do you write anonymously? Or would you like to? What are the reasons for writing under another name or anonymously?
First, The author might want the public not to who he was. This might be because of the content or because of the time. There was a time when women had to use the name of a man just to publish their work. There are also male authors who use female names to mask who they are – for example when writ8ing Romance Literature.
There are of course other circumstances that fall under this league.
If it is a confession article or post that reveals what is happening in a company, within a group or inside a government agency then the reason the author remaining unknown is obvious: he does not want his cover blown or compromomise his safety. Although not a writer – the now famous Deep Throat of Woodward and Bernstein comes to mind.
The author might just want to keep his privacy.
Second, The author might want to distance himself from work. It could be different genres or it could be a test balloon when submitting works.
Third, Some do it as a precaution when they start to criticize or even attack an issue or even a person. There is a certain shield of protection when writing under a pseudonym. It emboldens the writer to write or say things he or she would normally write about. The repercussions are somewhat not felt.
But not anymore as can be seen in the case of Google, the model and the anonynmous blogger.