Maximize Expected Profits by Dynamic After-Sales Service Investment Strategy Based on Word-of-Mouth Marketing in Social Network Shopping

Figure 11

Parameters on the expected profit. (a–c) on Facebook network; (d–f) on e-mail network; (g–i) on Twitter network.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)