In Wharton management professor Peter Cappelli's most recent book - Why Good People Can't Get Jobs: The Skills Gap and What Companies Can Do About It - he debunks the oft-repeated argument from employers that applicants don't have the skills needed for today's jobs. Instead, he puts much of the blame on companies themselves, including their lack of information about hiring and training costs, and on computerized applicant tracking systems that can make it harder, not easier, to find qualified job candidates.