@article {McDonaldThornton2008, title = {Primer on the Mortgage Market and Mortgage Finance}, journal = {The Federal Reserve Bank of St. Louis Review}, volume = {90}, number = {1}, year = {2008}, pages = {31{\textendash}46}, url = {https://files.stlouisfed.org/files/htdocs/publications/review/08/01/McDonald.pdf}, author = {McDonald, Daniel J. and Thornton, Daniel L.} }