What is the average number of articles written per author in a year and has it increased recently? Did anyone research the data about scientific productivity? I.e. what is the average number of articles written by author in a year in a specific field? I am  referring to average, since this is maybe easiest to calculate, but it would be interesting to see the distribution data too. This of course depends on how many journals we want to scope, but I would be interested to see any data on say most popular fields like physics, mathematics, chemistry, biology, psychology, economics, etc (order is of no importance).
A comprehensive review was conducted in the field of psychology in relation to publication rates and tenure. There is also a "fun" review related to beer consumption and publication in the field of avian evolutionary biology.



doi: 10.1111/j.1467-9280.2007.01889.x
Psychological Science April 2007 vol. 18 no. 4 283-286