In this paper, multi-item EOQ models with joint replacement policy are developed under two level partial trade credit policies with promotional effort cost sharing. To capture the market, supplier offers a partial credit period to its retailers, i.e., a credit period (M) is offered on a fraction (f_1) of order quantity and (M) is also (f_1) dependent. Due to this facility, retailer also offers a partial (f_2) trade credit period T_0 (
Key words: Multi-item replenishment; Partial Trade credit; Promotional cost sharing; Multi objective particle Swarm Optimization.
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