Notes, Comments and Preliminary results Mar 30 2023 Adilson de Oliveira , Susan Schommer and Ledson L. G. da Rosa   Oil price volatility: impacts in the Brazilian economy   Abstract  Contact Information  Citation  Full Text  -  Note   Nov 06 2018 Aloisio Araujo , Liev Maribondo and Susan Schommer   Heterogeneous expectations, collateral constraints and unconventional monetary policy   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result