TY  - JOUR 
T1  - Unit roots in macroeconomic time series: theory, implications, and evidence
JO  - Nova Economia
A1  - Libanio, Gilberto A.
SN  - 0103-6351
UL  - 10.1590/S0103-63512005000300006
VL  - 15 
Y1  - 2005
PB  - Brasil 
ER  -