Table 1 Five types of advisors based on different review balance

I. Extremely negative Balanced

R < <S^a: number of positive ratings are significantly lower than number of negative ratings (R/S < 0.2^b)

II. Negative balanced

R < S: number of positive ratings are lower than number of negative ratings (0.2 ≤ R/S < 0.7)

III. Neutral balanced

R ≈ S: number of positive ratings are approximately the same as number of negative ratings (0.7 ≤ (R/S or S/R) ≤ 1)

IV. Positive balanced

R > S: number of positive ratings are larger than number of negative ratings (0.2 ≤ S/R < 0.7)

V.Extremely positive Balanced

R> > S: number of positive ratings are significantly larger than number of negative ratings (S/R < 0.2)