@inbook{NBERc10101,
 Crossref = "NBERhoxb04-1",
 title = "How Financial Aid Affects Persistence",
 author = "Eric Bettinger",
 BookTitle = "College Choices: The Economics of Where to Go, When to Go, and How to Pay For It",
 Publisher = "University of Chicago Press",
 pages = "207-238",
 year = "2004",
 month = "September",
 URL = "http://www.nber.org/chapters/c10101",
}
@book{NBERhoxb04-1,
 title = "College Choices: The Economics of Where to Go, When to Go, and How to Pay For It",
 author = "Caroline M. Hoxby",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2004",
 URL = "http://www.nber.org/books/hoxb04-1",
}