This answer is not that easy to answer, as using RePEc services typically does not require any registration. Still, some services use Google Analytics, which provides some elementary statistics about users, but nothing about demographics. Below are some of what we can learn by looking at the Google Analytics for IDEAS for 2016. This may or may not apply to other RePEc services.
First, one can learn a few things from the browser that is used. 53% of users have it set to use US-English, 8% British English, 4% each for Spanish and Chinese, and 3% each for French and German. This language variable, however, does not correlate perfectly with the location. Indeed, only 18% of users are in the United States, the next most frequent countries being the United Kingdom (7%), India (7%), Germany (4%), Italy, France, Canada, China (all 3%), and then with 2% Australia, the Philippines, Kenya, Colombia, Spain, the Netherlands, Japan, Turkey, Pakistan and Malaysia. This wide distribution is actually quite encouraging, as the goal of RePEc is to democratize the access to research, and getting “non-traditional” countries to adopt RePEc services this well is a good sign. In particular, Africa represents 9% of the traffic, South Asia 10%, Southeast Asia 7% and South America 6%. And yes, there is traffic from North Korea.
What about browsers? Chrome is the clear winner, at 55%. Next come Firefox (14%), Safari (13%), Internet Explorer (8%), Opera Mini (3%) and Edge (2%). In terms of operating systems, Windows is first at 66% (of which 53% is Windows 7, 27% Windows 10, and 13% on Windows 8.1), then 14% on Macintosh, 10% Android, 6% iOS, and 1% Linux. It is clear from this that desktop use is still predominant (81%), while 16% use a mobile phone and only 3% a tablet.
Where is traffic originating? Most of it comes from search engines (76%), while 15% of traffic is referred from another website. 8% of traffic is direct, meaning from bookmarks or by typing the URL in the browser. 1% is coming from social media.
Posted by Christian Zimmermann 
The RePEc Blog 