. xtunitroot fisher logx1,dfuller demean lags(1)

Fisher-type unit-root test for logx1

Based on augmented Dickey-Fuller tests

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Ho: All panels contain unit roots           Number of panels  =      5

Ha: At least one panel is stationary        Number of periods =     12

AR parameter: Panel-specific                Asymptotics: T -> Infinity

Panel means:  Included

Time trend:   Not included                  Cross-sectional means removed

Drift term:   Not included                  ADF regressions: 1 lag

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                  Statistic      p-value

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Inverse chi-squared(10)   P        12.9628       0.2258

Inverse normal            Z        -0.0952       0.4621

Inverse logit t(29)       L*       -0.2865       0.3883

Modified inv. chi-squared Pm        0.6625       0.2538

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P statistic requires number of panels to be finite.

Other statistics are suitable for finite or infinite number of panels.

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