All over the U.S., a chronic shortage of college teachers has turned into a surplus. At the annual convention of the American Historical Association last winter, 2,200 applicants squabbled over 402 openings—down from 550 the year before. At the University of Massachusetts this year, 1,000 would-be English teachers applied for eight jobs. One small West Coast college received 750 inquiries about a position in the English department, despite the fact that no opening existed. In Dayton, Texas (pop. 3,000), where the local high school has only 455 students, Principal Kenneth Almond has received job inquiries from 15 Ph.D.s in physics at universities across the country. "And yet," says Almond, "we teach only one elementary physics course to an average bunch of students."

This is a pretty interesting question. It depends who you ask ..."Take a look at the evidence, and it’s clear that the conventional wisdom is wrong. As I’ve discussed in the past, in areas of the country that boast more specialists, patient outcomes are worse—even after adjusting for differences in age, race and the overall health of the population. (I have written about this for both Health Beat and Dartmouth) A greater supply of primary care physicians, on the other hand, leads to better outcomes. So, Goodman quite sensibly concludes: “If improving the health and well-being of the population remains our goal we need more generalists and fewer specialists, today and in the future.”
via.
http://www.healthbeatblog.org/2007/11/does-the-us-hav.html

Its so relative!
Take a look here
http://myhealthcareer.net/career/nursing

I have no idea!