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. 2014 Aug 6;9(8):e103799. doi: 10.1371/journal.pone.0103799

Table 5. The panel regression results of speed data.

Pooled model Fixed-effects model Random-effects model
YInline graphic YInline graphic LnYInline graphic YInline graphic YInline graphic LnYInline graphic YInline graphic YInline graphic LnYInline graphic
Model Model Model Model Model Model Model Model Model
X –0.000008 0.0000036 0.0000033
(–1.03) (0.61) (0.55)
LnX –0.0270*** –0.116*** –0.00241 –0.0131 –0.00447 –0.0212
(–5.47) (–9.11) (–0.45) (–0.97) (–0.87) (–1.61)
_cons 0.385*** 0.528*** –0.603*** 0.383*** 0.407*** –1.108*** 0.383*** 0.412*** –1.145***
(59.00) (20.63) (–9.19) (88.68) (15.19) (–16.37) (14.00) (11.22) (–11.80)
N 3844 2775 2466 3844 2775 2466 3844 2775 2466
r2 0.000277 0.0107 0.0326 0.0000989 0.0000777 0.000403 0.0043 0.0238 0.0616
r2_a 0.0000168 0.0103 0.0322 –0.0332 –0.0467 –0.0525 0.0041 0.0215 0.0602
F(χ2) 1.064 29.92*** 83.06*** 0.368 0.206 0.944 0.3 0.75 2.6

t statistics in parentheses;

*p<0.05,

**p<0.01,

***p<0.001.