I'd like to offer a potential explanation of this: Middle and upper-lower-class individuals have the most to gain by doing things on their own.
* An upper-lower-class or middle class child will not have the same burdens and problems as a lower-class individual as describes in this post. They likely have just enough of a support system to be able to make it on their own.
* An upper-lower-class or middle class child will NOT be able to get into a great college with scholarships. They will likely choose a safer route, like a cheaper state school. This makes them less desirable to employers, so the "safe" route doesn't exist.
Basically I ended up paying more for a less valuable piece of paper. Because my chosen school sucked it was really hard to find a job. I'm only where I'm at because I'm lucky, and I don't think many people in my situation would have had similar success.
I'm curious about the socio-economic background of the parents as well.
If you are born to parents in the lowest quartile you have ~10% chance of making it into the highest by age 26. For people born in the highest the probability is ~30%.
(and if it was random it would, obviously, be 1/4 = 25%)
http://www.economist.com/news/united-states/21595437-america...
Another problem is that because the distribution is so heavily skewed toward the top (for both income and wealth, but more heavily for wealth), dividing the population into equal groups creates a somewhat misleading picture of mobility. A nonlinear breakdown of classes is more reflective of the distribution. In that case we might ask something like how many people move from the bottom 40% to the top 5%.
Although for some questions, e.g. "Can you escape poverty in the US today?" (which could be specified as moving from 1st -> 3rd quartile) this data works.
But, for other types of questions, e.g. "Is extreme wealth mostly hereditary?" you'd need a non-linear breakdown of classes.
I would wager that a lot has changed in the last 7 years.
Cronyism is just a given when it comes to finance and business dealings.