r：rating r'：estimated rating R: reputationc：commentary B：belief W：willingness to pay
c
C2: Combination(with Reputation)
B
—
R
r
＋
A2: Rating (with Reputation)
W
r'
C1: Combination
A1: Rating
B2: Text (with Reputation)
B2: Commentary(with Reputation)
B1: Text
B1: Commentary
C2: Combination (with Reputation)
A2: Rating(with Reputation)
r：rating r'：estimated rating R: reputationc：commentary B：belief W：willingness to pay
