where Thus, the equation (18) with (19) is the nonlinear integrodifferential equation. However, since the handling data is daily, the time difference is one day, we can solve the equation numerically as a difference equation. Using the equation (18) and (19), we calculate the purchase intention for several movies where the advertisement cost presented from Dentsu is inputted into A ( t ) with the unit of 1000 yen. The calculated results are shown in figs.6-8. The results are compared with the counts of the blog-writing entry as the quasi-revenue. We found that the agreement of the calculation with the quasi-revenue (blog) is very well. For the Da Vinci Code and the Pirates of Carribean at World’s End, we have used almost same parameters except the initial value of the purchase intension. Interesting results are shown in figs.6 and 7. In these figures, we present the calculation for ”Always” and ”Zoku Always”. The two movies are the part 1 and the part 2 of the same story. Though Always is the very successful movie, the information for the movie before the opening was almost nothing. Thus, the factors of the direct and indirect communication have very large values after the opening day. For the part 2, the Zoku Always, the factors are large values even before the opening. Finally, we show the components in the simulation of the Da Vince Code. The components shown in figure 8 correspond to the terms of eq(18). the results shows us that the indirect communication terms are effective for the case of the Da Vinci Code. With the agreement in figs4 and 5, we found that our model can reproduce the purchase intention very well. If we can assume that the attractions of the two movies are same, this success of the reproduction of the purchase intention means that our model can predict the revenue of the movies as a function of the advertisement cost. DISUCSSION CALCULATED RESULTS N ( t ) = N$_{p}$ ∫ t 0 I ( τ ) dτ (19) 9