I am grateful for my family, for their unconditional love and support. I am also grateful for Guilherme, for always being by my side. This work would also not have been possible without the support and inspiration from my friends and colleagues from PUC-Rio and the Sala de Sigilo at IBGE. Finally, I thank the professors and administrative staff at PUC-Rio. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior-Brasil (CAPES)-Finance Code 001. Financial support from CNPq and FAPERJ is also gratefully acknowledged.