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Not only the seller but also the buyer may apply trade credit as a strategic tool to stimulate his customers\u2019 demands. This paper investigates the effects of the latter policy, two-level trade credit, on a retailer\u2019s optimal ordering decisions within the economic order quantity framework and allowable shortages. Unlike most of the previous studies, the demand function of the customers is considered to increase with time. The objective of the retailer\u2019s inventory model is to maximize the profit. The replenishment decisions optimally are obtained using genetic algorithm. Two special cases of the proposed model are discussed and the impacts of parameters on the decision variables are finally investigated. Numerical examples demonstrate the profitability of the developed two-level supply chain with backorder.<\/jats:p>","DOI":"10.1155\/2014\/340135","type":"journal-article","created":{"date-parts":[[2014,12,31]],"date-time":"2014-12-31T21:03:21Z","timestamp":1420059801000},"page":"1-11","source":"Crossref","is-referenced-by-count":2,"title":["An Economic Order Quantity Model with Completely Backordering and Nondecreasing Demand under Two-Level Trade Credit"],"prefix":"10.47654","volume":"2014","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0054-2884","authenticated-orcid":true,"given":"Zohreh","family":"Molamohamadi","sequence":"first","affiliation":[{"name":"Department of Mechanical and Manufacturing Engineering, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rahman","family":"Arshizadeh","sequence":"additional","affiliation":[{"name":"Department of Computer Engineering, Islamic Azad University, Science 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