Hard to measure both over long and short timescales, since so many factors affect the willingness of people to invest personal effort and risk toward earning.
You might have more success looking at the amounts while attempting to control for more factors; but of course, you could make it worse, because statistics is hard!
microcolonel|6 years ago
You might have more success looking at the amounts while attempting to control for more factors; but of course, you could make it worse, because statistics is hard!