@inbook{NBERc12552,
 Crossref = "NBERbrun11-1",
 title = "Detecting "Bad" Leverage",
 author = "Amir Sufi",
 BookTitle = "Risk Topography: Systemic Risk and Macro Modeling",
 Publisher = "University of Chicago Press",
 year = "2012",
 month = "October",
 URL = "http://www.nber.org/chapters/c12552",
}
@book{NBERbrun11-1,
 title = "Risk Topography: Systemic Risk and Macro Modeling",
 author = "Markus K. Brunnermeier and Arvind Krishnamurthy",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2013",
 URL = "http://www.nber.org/books/brun11-1",
}