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. levinlin ri,lags(1)
evin-Lin-Chu test for ri Deterministics chosen: constant
Pooled ADF test, N,T = (10,11) Obs = 90
Augmented by 1 lags (average) Truncation: 6 lags
coefficient t-value t-star P > t
-1.12428 -10.811 -7.76613 0.0000
. ipshin ri,lags(1)
Im-Pesaran-Shin test for cross-sectionally demeaned ri
Deterministics chosen: constant
t-bar test, N,T = (10,11) Obs = 90
Augmented by 1 lags (average)
t-bar cv10 cv5 cv1 W[t-bar] P-value
-2.974 -1.900 -2.020 -2.240 -4.626 0.000
. xtreg ri rm rx,fe
Fixed-effects (within) regression Number of obs = 110
Group variable: company Number of groups = 10
R-sq: Obs per group:
within = 0.6034 min = 11
between = 0.6529 avg = 11.0
overall = 0.5327 max = 11
F(2,98) = 74.54
corr(u_i, Xb) = -0.5700 Prob > F = 0.0000
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ri | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
rm | .9712302 .0795647 12.21 0.000 .8133367 1.129124
rx | -.1423244 .6574173 -0.22 0.829 -1.446948 1.162299
_cons | 3.944048 6.765098 0.58 0.561 -9.481069 17.36917
-------------+----------------------------------------------------------------
sigma_u | 4.5970455
sigma_e | 6.7799734
rho | .3149412 (fraction of variance due to u_i)
F test that all u_i=0: F(9, 98) = 3.41 Prob > F = 0.0011
. xtreg ri rm,fe
Fixed-effects (within) regression Number of obs = 110
Group variable: company Number of groups = 10
R-sq: Obs per group:
within = 0.6032 min = 11
between = 0.6529 avg = 11.0
overall = 0.5327 max = 11
F(1,99) = 150.49
corr(u_i, Xb) = -0.5696 Prob > F = 0.0000
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ri | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
rm | .9705283 .079115 12.27 0.000 .8135471 1.12751
_cons | 2.486303 .6495415 3.83 0.000 1.197472 3.775134
-------------+----------------------------------------------------------------
sigma_u | 4.5925472
sigma_e | 6.7472571
rho | .31660837 (fraction of variance due to u_i)
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F test that all u_i=0: F(9, 99) = 3.44 Prob > F = 0.0010
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