Merchants

Tourists

The quality product

The product of inferior quality has not been investigated

The product of inferior quality has been investigated

Cost P11

S1 − P11, P11 − C1

Cost P12

S1 − P12, P12 − C1

Cost P21

(S2 − P21) (1 − q1), (P21 − C2) (1 − q1)

(S2 − P21) × q1, (P21 − C2 − M1) × q1

Cost P22

(S2 − P22) (1 − q1), (P22 − C2) (1 − q1)

(S2 − P22) × q1, (P22 − C2 − M1) × q1