A Comparative study of unit root tests with panel data and a new simple test（11）

G. S.Maddala and Shaowen Wu

(H. D.Thoreau: Walden)

        Another observation in Tables 1 and 2 is theeffect of selection of order of the ADF regressions.

TABLE 1

Size and Power of theUnit Root Tests (Constant Term Only)

TABLE 2

Size and Powerof the Unit Root Tests (Time Trend)