Dr. Charles Larkin:

The problem with all these studies is saying correlation is equal to causation. When the statistical analysis is done, they suffer from tremendous amounts of multi-collinearity. Is the reason for the improved life expectancy of an individual who has gone through higher education down to the fact that he or she has gone through third level and has not eaten as many bad foods or engaged in as many bad habits or is it because they are part of a socioeconomic classification which tends to have higher levels of longevity anyway?