{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,6,19]],"date-time":"2024-06-19T19:16:57Z","timestamp":1718824617556},"reference-count":25,"publisher":"World Scientific Pub Co Pte Lt","issue":"01","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Asia Pac. J. Oper. Res."],"published-print":{"date-parts":[[2012,2]]},"abstract":"<jats:p> Costs of many items drop systematically throughout their life-cycles, due to advances in technology and competition. Motivated by the management of service parts for some high-tech products, this paper studies inventory decisions for such items. In a periodic review setting with stochastic demand, we model the purchasing costs of successive periods as a stochastic and decreasing sequence. Unit selling price of the item is determined as some mark-up of the purchasing cost and, hence, will change over time as well. We consider two specific mark-up models: (1) purchasing cost plus constant-dollar-amount mark-up, and (2) purchasing cost plus constant-percentage mark-up. To maximize the total discounted expected profit, we derive conditions under which myopic policies are optimal for the systems. <\/jats:p>","DOI":"10.1142\/s0217595912400027","type":"journal-article","created":{"date-parts":[[2012,3,14]],"date-time":"2012-03-14T06:10:19Z","timestamp":1331705419000},"page":"1240002","source":"Crossref","is-referenced-by-count":3,"title":["INVENTORY DECISIONS WITH DECREASING PURCHASING COSTS"],"prefix":"10.1142","volume":"29","author":[{"given":"XIANGPEI","family":"HU","sequence":"first","affiliation":[{"name":"School of Management, Dalian University of Technology, Dalian, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"HUIMIN","family":"WANG","sequence":"additional","affiliation":[{"name":"The Business School, Hohai University, Nanjing, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"YUNZENG","family":"WANG","sequence":"additional","affiliation":[{"name":"The School of Business Administration, University of California, Riverside, CA 92521, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2012,4,5]]},"reference":[{"key":"rf1","first-page":"292","volume":"20","author":"Ardalan A.","journal-title":"IIE Transactions"},{"key":"rf3","doi-asserted-by":"publisher","DOI":"10.1057\/jors.1975.113"},{"key":"rf4","doi-asserted-by":"publisher","DOI":"10.1016\/S0377-2217(97)00219-1"},{"key":"rf5","first-page":"627","volume":"28","author":"Cohen M. 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