Table 3 Results of the random-effects model of the panel data in the area of section I of the dam

Random-effects GLS regression

Number of obs = 17323

Group variable: _j

Number of groups = 17

R-sq: within = 0.0000

Obs per group: min = 1019

between = 0.0000

avg = 1019.0

overall = 0.1816

max = 1019

Wald chi2(10) = 15548.80

corr(u_i, X) = 0 (assumed)

Prob > chi2 = 0.0000

x1

−159.307

827.6679

−0.19

0.847

−1781.51

1462.893

x2

331.9333

1494.828

0.22

0.824

−2597.88

3261.743

x3

−280.182

1192.674

−0.23

0.814

−2617.78

2057.416

x4

91.74331

354.8331

0.26

0.796

−603.717

787.2034

x5

0.067455

0.118763

0.57

0.57

−0.16532

0.300226

x6

−0.97668

0.111943

−8.72

0

−1.19608

−0.75727

x7

−0.01332

0.042572

−0.31

0.754

−0.09676

0.070115

x8

−0.3112

0.020144

−15.45

0

−0.35068

−0.27172

x9

0.006649

0.019384

0.34

0.732

−0.03134

0.04464

x10

−0.05327

0.020773

−2.56

0.01

−0.09398

−0.01255

_cons

23.4151

170.7861

0.14

0.891

−311.32

358.1497

sigma_u

3.061757

sigma_e

1.702147

rho

0.763903

(fraction of variance due to u_i)