Pii: S0925-5273(98)00240-0
نویسندگان
چکیده
We study a periodic-review inventory model where, in addition to the procurement quantity, price is also a decision variable. We develop a model where demand in each period is a random variable having a priceand, possibly, period-dependent probability distribution, with the expected demand decreasing in price. The model includes price limits and "xed ordering costs in addition to unit procurement holding and shortage costs. We study the optimal policies which jointly maximize the discounted expected pro"t over a "nite planning horizon. We characterize the form of the optimal procurement policy under a general price}demand relationship and give a su$cient condition for it to be (s n , S n ) type. We also discuss some special cases and extensions to the basic model, including the in"nite horizon problem. ( 2000 Elsevier Science B.V. All rights reserved.
منابع مشابه
Parathyroid hormone-related peptide (PTHrP) induces parietal endoderm formation exclusively via the Type I PTH/PTHrP receptor
A number of studies suggest a role for PTHrP and the classical PTH/PTHrP receptor (type I) in one of the first differentiation processes in mouse embryogenesis, i.e. the formation of parietal endoderm (PE). We previously reported that although in type I receptor (-/-) embryos PE formation seemed normal, the embryos were smaller from at least day 9.5 p.c. and 60% had died before day 12.5 p.c. He...
متن کاملVolume Contents (E-only pages)
Origin of exocrine pancreatic cells from nestin-positive precursors in developing mouse pancreas 15 Ce-Y14 and MAG-1, components of the exon–exon junction complex, are required for embryogenesis and germline sexual switching in Caenorhabditis elegans 27 The grainy head transcription factor is essential for the function of the frizzled pathway in the Drosophila wing 37 The MADS-box transcription...
متن کاملExpression and cellular localization of the Toucan protein during Drosophila oogenesis
The toucan (toc) gene is required in the germline for somatic cell patterning during Drosophila oogenesis. To better understand the function of toc, we performed a detailed analysis of the distribution of the Toucan protein during oogenesis. Toc expression is restricted to the germline cells and shows a dynamic distribution pattern throughout follicle development. Mislocalization of the Toc pro...
متن کاملProx1 is an early specific marker for the developing liver and pancreas in the mammalian foregut endoderm
Although important progress has been made recently in the elucidation of the molecular mechanisms that regulate differentiation and morphogenesis of endoderm-derived tissues such as pancreas and liver, less is known about the preliminary steps of early regional specification. Recent evidence supports the proposal that the early endoderm contains a bipotential precursor cell type for pancreas an...
متن کاملXenopus frizzled 7 can act in canonical and non-canonical Wnt signaling pathways: implications on early patterning and morphogenesis
Here we report the cloning of a Xenopus frizzled transmembrane receptor, Xfz7, and describe its expression pattern during early embryogenesis. Xfz7 mRNA is provided maternally and zygotic transcription peaks in gastrula stages. At that time, transcripts are preferentially localized to the marginal zone and become restricted to distinct regions of the tadpoles in tailbud stages. Overexpression o...
متن کامل