Table 6 Statistical results of...

Table 6

Statistical results of zero-inflated negative binomial regression

	Model 1	Model 2	Model 3	Model 4
Negative binomial
Independent variables	Coefficients (std. error)
(Intercept)	−0.566 (0.006)^***	−0.566 (0.006)^***	−0.564 (0.006)^***	−0.564 (0.006)^***
Review sidedness	−0.042 (0.006)^***	−0.071 (0.008)^***	−0.045 (0.006)^***	−0.075 (0.008)^***
Information factuality	0.038 (0.005)^***	0.039 (0.005)^***	0.043 (0.005)^***	0.044 (0.005)^***
Emotional intensity at the beginning of a review	−0.014 (0.005)^**	−0.014 (0.005)^**	−0.014 (0.005)^**	−0.014 (0.005)^**
Reviewer reputation	0.348 (0.006)^***	0.347 (0.006)^***	0.348 (0.006)^***	0.347 (0.006)^***
Positive sentiment	0.037 (0.006)^***	0.041 (0.006)^***	0.039 (0.006)^***	0.043 (0.006)^***
Abs (negative sentiment)	0.029 (0.007)^***	0.037 (0.007)^***	0.032 (0.007)^***	0.039 (0.007)^***
Reviewer reputation × review sidedness		0.026 (0.005)^***		0.027 (0.005)^***
Information factuality × positive sentiment			0.016 (0.005)^***	0.017 (0.005)^***
Information factuality × Abs (negative sentiment)			−0.003 (0.005)	−0.004 (0.005)
Control variables
Rating	0.141 (0.006)^***	0.141 (0.006)^***	0.141 (0.006)^***	0.140 (0.006)^***
Rating²	0.138 (0.003)^***	0.137 (0.003)^***	0.139 (0.003)^***	0.138 (0.003)^***
Review length	0.228 (0.007)^***	0.228 (0.007)^***	0.225 (0.007)^***	0.224 (0.007)^***
Readability	0.045 (0.005)^***	0.045 (0.005)^***	0.045 (0.005)^***	0.046 (0.005)^***
Available days	0.502 (0.005)^***	0.502 (0.005)^***	0.502 (0.005)^***	0.502 (0.005)^***
Hotel class	−0.040 (0.005)^***	−0.040 (0.005)^***	−0.040 (0.005)^***	−0.040 (0.005)^***
Hotel reputation	0.059 (0.005)^***	0.059 (0.005)^***	0.059 (0.005)^***	0.059 (0.005)^***
Hotel popularity	−0.087 (0.005)^***	−0.087 (0.005)^***	−0.087 (0.005)^***	−0.087 (0.005)^***
Log (theta)	0.046 (0.010)^***	0.047 (0.010)^***	0.047 (0.010)^***	0.047 (0.010)^***
Zero model
(Intercept)	−14.317 (1.620)^***	−14.322 (1.604)^***	−14.314 (1.620)^***	−14.317 (1.604)^***
Rating	0.056 (0.082)	0.062 (0.082)	0.056 (0.082)	0.063 (0.082)
Rating²	0.073 (0.038)	0.075 (0.038)	0.073 (0.038)	0.075 (0.038)^*
Review length	0.120 (0.070)	0.090 (0.072)	0.117 (0.070)	0.087 (0.072)
Readability	−0.050 (0.057)	−0.045 (0.056)	−0.047 (0.056)	−0.042 (0.055)
Available days	−2.163 (0.091)^***	−2.165 (0.091)^***	−2.163 (0.091)^***	−2.164 (0.091)^***
Hotel class	0.022 (0.057)	0.023 (0.057)	0.023 (0.057)	0.023 (0.057)
Hotel reputation	0.202 (0.077)^**	0.201 (0.077)^**	0.202 (0.077)^**	0.201 (0.077)^**
Hotel popularity	−0.301 (0.088)^***	−0.299 (0.088)^***	−0.301 (0.088)^***	−0.299 (0.088)^***
Reviewer reputation	−6.440 (0.641)^***	−6.445 (0.635)^***	−6.439 (0.641)^***	−6.443 (0.635)^***
Akaike Information Criterion (AIC)	326830.989	326804.329	326823.74	326795.845
Log-likelihood	−163389.494	−163375.164	−163383.87	−163368.922
Num. obs.	144982	144982	144982	144982

	Model 1	Model 2	Model 3	Model 4
Negative binomial
Independent variables	Coefficients (std. error)
(Intercept)	−0.566 (0.006)^***	−0.566 (0.006)^***	−0.564 (0.006)^***	−0.564 (0.006)^***
Review sidedness	−0.042 (0.006)^***	−0.071 (0.008)^***	−0.045 (0.006)^***	−0.075 (0.008)^***
Information factuality	0.038 (0.005)^***	0.039 (0.005)^***	0.043 (0.005)^***	0.044 (0.005)^***
Emotional intensity at the beginning of a review	−0.014 (0.005)^**	−0.014 (0.005)^**	−0.014 (0.005)^**	−0.014 (0.005)^**
Reviewer reputation	0.348 (0.006)^***	0.347 (0.006)^***	0.348 (0.006)^***	0.347 (0.006)^***
Positive sentiment	0.037 (0.006)^***	0.041 (0.006)^***	0.039 (0.006)^***	0.043 (0.006)^***
Abs (negative sentiment)	0.029 (0.007)^***	0.037 (0.007)^***	0.032 (0.007)^***	0.039 (0.007)^***
Reviewer reputation × review sidedness		0.026 (0.005)^***		0.027 (0.005)^***
Information factuality × positive sentiment			0.016 (0.005)^***	0.017 (0.005)^***
Information factuality × Abs (negative sentiment)			−0.003 (0.005)	−0.004 (0.005)
Control variables
Rating	0.141 (0.006)^***	0.141 (0.006)^***	0.141 (0.006)^***	0.140 (0.006)^***
Rating²	0.138 (0.003)^***	0.137 (0.003)^***	0.139 (0.003)^***	0.138 (0.003)^***
Review length	0.228 (0.007)^***	0.228 (0.007)^***	0.225 (0.007)^***	0.224 (0.007)^***
Readability	0.045 (0.005)^***	0.045 (0.005)^***	0.045 (0.005)^***	0.046 (0.005)^***
Available days	0.502 (0.005)^***	0.502 (0.005)^***	0.502 (0.005)^***	0.502 (0.005)^***
Hotel class	−0.040 (0.005)^***	−0.040 (0.005)^***	−0.040 (0.005)^***	−0.040 (0.005)^***
Hotel reputation	0.059 (0.005)^***	0.059 (0.005)^***	0.059 (0.005)^***	0.059 (0.005)^***
Hotel popularity	−0.087 (0.005)^***	−0.087 (0.005)^***	−0.087 (0.005)^***	−0.087 (0.005)^***
Log (theta)	0.046 (0.010)^***	0.047 (0.010)^***	0.047 (0.010)^***	0.047 (0.010)^***
Zero model
(Intercept)	−14.317 (1.620)^***	−14.322 (1.604)^***	−14.314 (1.620)^***	−14.317 (1.604)^***
Rating	0.056 (0.082)	0.062 (0.082)	0.056 (0.082)	0.063 (0.082)
Rating²	0.073 (0.038)	0.075 (0.038)	0.073 (0.038)	0.075 (0.038)^*
Review length	0.120 (0.070)	0.090 (0.072)	0.117 (0.070)	0.087 (0.072)
Readability	−0.050 (0.057)	−0.045 (0.056)	−0.047 (0.056)	−0.042 (0.055)
Available days	−2.163 (0.091)^***	−2.165 (0.091)^***	−2.163 (0.091)^***	−2.164 (0.091)^***
Hotel class	0.022 (0.057)	0.023 (0.057)	0.023 (0.057)	0.023 (0.057)
Hotel reputation	0.202 (0.077)^**	0.201 (0.077)^**	0.202 (0.077)^**	0.201 (0.077)^**
Hotel popularity	−0.301 (0.088)^***	−0.299 (0.088)^***	−0.301 (0.088)^***	−0.299 (0.088)^***
Reviewer reputation	−6.440 (0.641)^***	−6.445 (0.635)^***	−6.439 (0.641)^***	−6.443 (0.635)^***
Akaike Information Criterion (AIC)	326830.989	326804.329	326823.74	326795.845
Log-likelihood	−163389.494	−163375.164	−163383.87	−163368.922
Num. obs.	144982	144982	144982	144982

Note(s): ^***p < 0.001, ^**p < 0.01, ^*p < 0.05

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