What is the promotion rate of professors in United States? I'm writing an essay, and want to know the promotion rate and average duration from assistant professor to associate professor and associate professor to professor in recent years. Sadly I don't know the data for the US. Could anyone tell me?
The US National Science Foundation collects a lot of data from surveys of recent doctoral recipients that it publishes on this web page. The precise thing you are looking for (tenure success rate) does not seem to appear, but there is a lot of relevant information. Specific professional societies collect similar information. For instance, the American Mathematical Society publishes an annual survey of information on recent doctoral recipients; it includes data about the salaries and employment situation of recent doctoral recipients in the mathematical sciences.