Abstract: Based on Jerath's demand forecast model,this paper studies the impact of the information-gathering capability of e-channel on the profit of the channel members and total channel,then further analyzes the strategies of channel selection and information-sharing.By solving the model,we have got the channel members' equilibrium strategies and the factors that affect the strategies.The conclusion implies that retailers always choose not to share its private information and the manufactories make the channel selection based on the accuracy of the e-channel's prediction information,the market's uncertainty,the proportion of potential consumers who would like to buy through the e-channel and other factors.The channel's equilibrium strategy may be no information sharing in traditional channel or no information sharing in e-dual channels.And when some conditions are satisfied,information sharing in e-dual channels would be a Pareto strategy by some coordination mechanism.

Key words: e-channel, demand forecast, information sharing, channel selection