This work considers the use of subsidy as channel coordination strategy in vertical cooperative advertising in which the manufacturer is the Stackelberg game leader and the retailer is the follower. While the retailer is directly involved in advertising, the manufacturer is indirectly involved through the provision of subsidy to aid the retailer in advertising the product. The work models the demand function using a multiplicative advertising-price-demand function, and obtains the players prices, the retail advertising effort, the manufacturers subsidy rate and the payoffs. The work observes that with increasing subsidy, the manufacturers price margin increases while that of the retailer reduces and eventual becomes zero with total subsidy. However, the manufacturer should not totally subsidise retail advertising since it would be counterproductive for him, while at the same time would lead to very large retail payoff. Thus with appropriate subsidy strategy the prices and payoffs, and eventually the entire channel can be coordinated.
Key words: Channel coordination, Vertical cooperative advertising, Stackelberg game, Advertising-price-demand function, Subsidy rate
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