TY  - CHAP
TI  - Explaining the persistence of profits: A time-varying approach
AF  - Conference Instituto Superior de Economia e Gestao (ISEG)
PP  - Lisabon
UR  - https://aquila.iseg.utl.pt/aquila/instituicao/ISEG
PY  - 2007-01-01
AU  - Crespo Cuaresma, Jesus 
AU  - Gschwandtner, Adelina 
ER -