Jena McGregor at The Washington Post has an interesting story summarizing recent research on the changes over the last 30 years in the composition of top leaders in US firms: The resume that makes for a top executive.
... [T]he majority of these top executives now have undergraduate degrees from state universities, with only a fraction going to college at one of the Ivies. Nearly 11 percent of the top executives are foreign-educated, up from just 2 percent in 1980. And however few women there may be in leadership positions, they actually climbed the corporate ladder faster than men, spending fewer years, on average, in each job and taking a shorter time to get to the top. [...]
Interestingly, the education backgrounds of top corporate leaders are becoming much more equal over time. In 1980, just 32 percent of leaders went to a public university. By 2001 that had grown to 48 percent, and in 2011 the number reached a majority, with 55 percent of corporate leaders going to state colleges. While the percent of Ivy Leaguers has dropped slightly, from 14 percent in 1980 to 10 percent in both 2001 and 2011, those with degrees from private non-Ivies has plummeted, falling from 54 percent in 1980 to just 35 percent in 2011. [...]
That’s not to say elite schools don’t still hold sway among MBA-holders and the very top leaders. If you look at the three most senior executives in each organization (say, the CEO, CFO and chairman), 21 percent have an undergraduate degree from an Ivy League school, compared with 10 percent overall. Additionally, 40 percent of all the executives who hold MBAs got them at one of the top 20 ranked business schools in the country, many of which are at Ivy League universities.