According to a national study released Monday, full professors at the University of Wisconsin-Madison earn significantly less than the national average for those who work at doctoral universities. That finding will surprise virtually no one in town, as leaders of the state’s flagship university have long argued that low pay has led to a brain drain of top faculty members bolting the institution for higher-paying jobs elsewhere. However, it may surprise some to learn that assistant professors at UW-Madison earn more than the national average.