Notes, Comments and Preliminary results Jul 19 2002 Antonio Quesada   From social choice functions to dictatorial social welfare functions   Abstract  Contact Information  Citation  Full Text  -  Note   Jul 10 2002 Antonio Quesada   Elasticity and revenue: a reappraisal   Abstract  Contact Information  Citation  Full Text  -  Comment   Jul 06 2001 Antonio Quesada   On the existence of self-enforcing equilibria   Abstract  Contact Information  Citation  Full Text  -  Note