Cerebro offers a tool to collect user statistics — across all projects in the universe. Go to Main menu > Tools > Users/Resources Statistics… to launch it.
There is a switch in the upper side of the User Statistics window that toggles between the two modes:
Parameters such as time frames or user’s tasks nesting levels are adjustable.
Results which include statistics on the work done by users and calculation of their wages are displayed in the table, which can be exported as a spreadsheet or copied to clipboard.