Single-person households are included in the family calculations.
So is the difference between older and younger families or between two-person and one-person households? Depending on the definition of household (flatmates?), I'd guess there are more young one-person households nowadays than 30 years ago.
You can't even correct for it. Because people who would get married early today are also different than people who would 30 years ago. For example, more religious.
Among families of all ages, those with more education tend to earn more than those with less. But that differential appears to be shrinking.
As more and more marginal college students are accepted?
I am very sceptical about stats like that. College graduates from 30 years ago are not the same in many other regards as today. Households headed by a young person today are not the same as those 30 years ago. This goes double for the US who accepted tens of millions of immigrants in the meantime.
Also, people are staying in education for longer and deferring earnings. A 23 year old working at Walmart will probably out earn a 23 year old studying for their masters while they are both 23 but probably not when they are both 30.
Some of them, but retail management salaries aren't very high unless you are running the entire store. In many cases supervisors aren't paid much more than the staff they manage and they still want graduates for higher management positions.
It is very easy to become a store manager (refrain from screwing up and take transfers when available for promotions), and those jobs pay exceptionally well. A Walmart or Winn-Dixie store manager is going to be making six figures, and at least in the case of Winn-Dixie, they actively avoid people with advanced degrees because district managers are afraid of getting passed over.
I don't see how this is a factor when they compare a change in difference between college graduates and not over time. College graduate in 1989 would also be deferring their earnings.
So is the difference between older and younger families or between two-person and one-person households? Depending on the definition of household (flatmates?), I'd guess there are more young one-person households nowadays than 30 years ago.
You can't even correct for it. Because people who would get married early today are also different than people who would 30 years ago. For example, more religious.
Among families of all ages, those with more education tend to earn more than those with less. But that differential appears to be shrinking.
As more and more marginal college students are accepted?
I am very sceptical about stats like that. College graduates from 30 years ago are not the same in many other regards as today. Households headed by a young person today are not the same as those 30 years ago. This goes double for the US who accepted tens of millions of immigrants in the meantime.
http://cafehayek.com/2013/11/when-facts-arent-facts.html