Group unit root test: Summary
Series: SER01
Date: 04/28/13 Time: 01:03
Sample: 1999 2012
Exogenous variables: Individual effects, individual linear trends
Automatic selection of maximum lags Automatic lag length selection based on SIC: 0
and Bartlett kernel
Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -1.59677 0.0552 1 13
Breitung t-stat -0.50598 0.3064 1 12