Fig. 3 shows the impact of number of products. For this figure, we use ρr=0.2 and a degree of sharing of five. Our simulation results are consistent
with our theoretical result. We find that the reduction in the value of information sharing for firm 2 ranged from 0.00 (when α=0.2) to
0.06 (when α=1.0) when P=5, but the same range was from 0.01 to 0.1 when P=50. The range for firm 6 was 5.71 (when α=0.2) to 31.69
(when α=1.0) when P=5 and 5.70 to 38.46 when P=50. This observation suggests that the reduction in the value of information sharing
because of product substitution is smaller when the degree of substitution is low and the firm is more downstream. An interesting observation
is that the marginal reduction is higher when the firms are more upstream and the degree of substitution is higher.