3 ms·
Not completely clear how the surveys were done 20 years apart, but the a better way to compare is to survey values every 20 years, and compare generations when
by chkaloon 7y ago
Not completely clear how the surveys were done 20 years apart, but the a better way to compare is to survey values every 20 years, and compare generations when they are the same age. Comparing 20yos and 50yos values could include a large age effect and not a true change in values over time.