Pedroni's cointegration tests:
No. of Panel units: 31       Regressors: 2
No. of obs.: 1147            Avg obs. per unit: 37
Data has been time-demeaned.

    --------------------------------------
       Test Stats. |     Panel      Group
    ---------------+----------------------
                 v |    -3.292          .
               rho |     2.343      3.406
                 t |     1.614      2.143
               adf |     2.228      1.893
    --------------------------------------
All test statistics are distributed N(0,1), under a null of no cointegration,
and diverge to negative infinity (save for panel v).


Pedroni's PDOLS (Group mean average):
No. of Panel units: 31       Lags and leads: 2
Number of obs: 992           Avg obs. per unit: 32
Data has been time-demeaned.

    --------------------------------------
         Variables |      Beta     t-stat
    ---------------+----------------------
            tl2_td |      1.44      14.57
            ts1_td |    .05561   -.005446