TY  - JOUR
A1  - Im, K.S.
A1  - Pesaran, M.H.
A1  - Shin, Y.
T1  - Testing for unit roots in heterogeneous panels
Y1  - 2003
DO  - 10.1016/S0304-4076(03)00092-7
JF  - Journal of Econometrics
VL  - 115
IS  - 1
SP  - 53
EP  - -74

ER  -