TY  - JOUR
A1  - Maddala, G.S.
A1  - Wu, S.
T1  - A Comparative Study of Unit Root Tests with Panel Data and A New Simple Test
Y1  - 1999
DO  - 10.1111/1468-0084.0610s1631
JF  - Oxford Bulletin of Economics and Statistics 
VL  - 61
IS  - S1
SP  - 631
EP  - -652

ER  -