Notes, Comments and Preliminary results Aug 20 2009 Udo Ebert   On the definition of nonessentiality   Abstract  Contact Information  Citation  Full Text  -  Note   Nov 28 2006 Udo Ebert   Extending the cost function: A simple method of modeling environmental regulation   Abstract  Contact Information  Citation  Full Text  -  Note   Dec 15 2005 Udo Ebert   Measures of downside risk   Abstract  Contact Information  Citation  Full Text  -  Note   Jan 09 2003 Udo Ebert and Patrick Moyes   The Difficulty of Income Redistribution with Labour Supply   Abstract  Contact Information  Citation  Full Text  -  Note