@inbook{NBERc8224,
 Crossref = "NBERlern08-2",
 title = "Explaining International Differences in Entrepreneurship: The Role of Individual Characteristics and Regulatory Constraints",
 author = "Silvia Ardagna and Annamaria Lusardi",
 BookTitle = "International Differences in Entrepreneurship",
 Publisher = "University of Chicago Press",
 pages = "17-62",
 year = "2010",
 month = "May",
 URL = "http://www.nber.org/chapters/c8224",
}
@book{NBERlern08-2,
 title = "International Differences in Entrepreneurship",
 author = "Josh Lerner and Antoinette Schoar",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2010",
 URL = "http://www.nber.org/books/lern08-2",
}