Documents disponibles écrits par cet auteur

New product diffusion decisions under supply constraints / Wenjing Shen in Management science, Vol. 57 N° 10 (Octobre 2011) 

Public ISBD [article]  in Management science > Vol. 57 N° 10 (Octobre 2011) . - pp. 1802-1810 Titre : New product diffusion decisions under supply constraints Type de document : texte imprimé Auteurs : Wenjing Shen, Auteur ; Izak Duenyas, Auteur ; Roman Kapuscinski, Auteur Année de publication : 2012 Article en page(s) : pp. 1802-1810 Note générale : Management Langues : Anglais (eng) Mots-clés : Inventory  production  Policies  Pricing  Production  smoothing  Capacity  Bass  model  Diffusion Index. décimale : 658 Organisation des entreprises. Techniques du commerce Résumé : Two recent papers on managing new product diffusion decisions under production constraints reach somewhat contradictory conclusions. Ho et al. (Ho, T.-H., S. Savin, C. Terwiesch. 2002. Managing demand and sales dynamics in new product diffusion under supply constraint. Management Sci. 48(2) 187–206) show that it is never optimal to refuse to satisfy any customers when the firm has inventory of the product. On the other hand, in a very similar model, Kumar and Swaminathan (Kumar, S., J. M. Swaminathan. 2003. Diffusion of innovations under supply constraints. Oper. Res. 51(6) 866–879) show that production constraints may in fact lead a firm to reject customers' orders even when the firm has the inventory to satisfy them (to slow down new product diffusion). We provide a counterexample to the results of Ho et al. (2002) and show that in their and Kumar and Swaminathan's (2003) models, it may be optimal to deny customers a product in inventory. We provide a generalization of both models that includes the ability to dynamically price the product (and also allows capacity and production costs to vary over time). We show that the unintuitive but optimal behavior of denying customers products that are in inventory disappears when the firm can dynamically set prices. DEWEY : 658 ISSN : 0025-1909 En ligne : http://mansci.journal.informs.org/content/57/10/1802.abstract [article] New product diffusion decisions under supply constraints [texte imprimé] / Wenjing Shen, Auteur ; Izak Duenyas, Auteur ; Roman Kapuscinski, Auteur . - 2012 . - pp. 1802-1810. Management Langues : Anglais (eng) in Management science > Vol. 57 N° 10 (Octobre 2011) . - pp. 1802-1810 Mots-clés : Inventory  production  Policies  Pricing  Production  smoothing  Capacity  Bass  model  Diffusion Index. décimale : 658 Organisation des entreprises. Techniques du commerce Résumé : Two recent papers on managing new product diffusion decisions under production constraints reach somewhat contradictory conclusions. Ho et al. (Ho, T.-H., S. Savin, C. Terwiesch. 2002. Managing demand and sales dynamics in new product diffusion under supply constraint. Management Sci. 48(2) 187–206) show that it is never optimal to refuse to satisfy any customers when the firm has inventory of the product. On the other hand, in a very similar model, Kumar and Swaminathan (Kumar, S., J. M. Swaminathan. 2003. Diffusion of innovations under supply constraints. Oper. Res. 51(6) 866–879) show that production constraints may in fact lead a firm to reject customers' orders even when the firm has the inventory to satisfy them (to slow down new product diffusion). We provide a counterexample to the results of Ho et al. (2002) and show that in their and Kumar and Swaminathan's (2003) models, it may be optimal to deny customers a product in inventory. We provide a generalization of both models that includes the ability to dynamically price the product (and also allows capacity and production costs to vary over time). We show that the unintuitive but optimal behavior of denying customers products that are in inventory disappears when the firm can dynamically set prices. DEWEY : 658 ISSN : 0025-1909 En ligne : http://mansci.journal.informs.org/content/57/10/1802.abstract

Total-cost procurement auctions / Dimitris Kostamis in Management science, Vol. 55 N° 12 (Décembre 2009) 

Public ISBD [article]  in Management science > Vol. 55 N° 12 (Décembre 2009) . - pp. 1985-1999 Titre : Total-cost procurement auctions : impact of suppliers'cost adjustments on auction format choice Type de document : texte imprimé Auteurs : Dimitris Kostamis, Auteur ; Damian R. Beil, Auteur ; Izak Duenyas, Auteur Article en page(s) : pp. 1985-1999 Note générale : Gestion Langues : Anglais (eng) Mots-clés : Procurement  auctions  Informed  buyer  Information  disclosure Index. décimale : 658 Organisation des entreprises. Techniques du commerce Résumé : We consider sealed- and open-bid total-cost procurement auctions where two attributes are used for contract award decisions: price, which is bid by the supplier, and a fixed cost adjustment, which is included by the buyer to capture nonprice factors such as logistics costs. Suppliers know only their own true production cost and their own cost adjustment, and the buyer does not know the suppliers' true production costs but does know all suppliers' cost adjustments, which she herself sets in order to make an informed total-cost decision. The buyer, who seeks to minimize her total (price and cost adjustment) procurement cost, can choose to run a first-price sealed-bid auction, where suppliers' bids are affected by their beliefs about each other's total costs, or a descending open-bid auction, where only the actual realizations of suppliers' total costs drive the auction outcome. We characterize the buyer's choice between the two formats as a threshold decision over suppliers' cost adjustments and analyze the effect of supplier beliefs on her decision. We also study the impact of additional suppliers on the buyer's decision, the effect of correlation between suppliers' production costs and their cost adjustments, and additive as well as multiplicative total-cost functions. The results suggest that procurement managers can use their evaluations of suppliers' cost adjustments to make better auction format decisions. DEWEY : 658 ISSN : 0025-1909 En ligne : http://mansci.journal.informs.org/cgi/content/abstract/55/12/1985?maxtoshow=&hit [...] [article] Total-cost procurement auctions : impact of suppliers'cost adjustments on auction format choice [texte imprimé] / Dimitris Kostamis, Auteur ; Damian R. Beil, Auteur ; Izak Duenyas, Auteur . - pp. 1985-1999. Gestion Langues : Anglais (eng) in Management science > Vol. 55 N° 12 (Décembre 2009) . - pp. 1985-1999 Mots-clés : Procurement  auctions  Informed  buyer  Information  disclosure Index. décimale : 658 Organisation des entreprises. Techniques du commerce Résumé : We consider sealed- and open-bid total-cost procurement auctions where two attributes are used for contract award decisions: price, which is bid by the supplier, and a fixed cost adjustment, which is included by the buyer to capture nonprice factors such as logistics costs. Suppliers know only their own true production cost and their own cost adjustment, and the buyer does not know the suppliers' true production costs but does know all suppliers' cost adjustments, which she herself sets in order to make an informed total-cost decision. The buyer, who seeks to minimize her total (price and cost adjustment) procurement cost, can choose to run a first-price sealed-bid auction, where suppliers' bids are affected by their beliefs about each other's total costs, or a descending open-bid auction, where only the actual realizations of suppliers' total costs drive the auction outcome. We characterize the buyer's choice between the two formats as a threshold decision over suppliers' cost adjustments and analyze the effect of supplier beliefs on her decision. We also study the impact of additional suppliers on the buyer's decision, the effect of correlation between suppliers' production costs and their cost adjustments, and additive as well as multiplicative total-cost functions. The results suggest that procurement managers can use their evaluations of suppliers' cost adjustments to make better auction format decisions. DEWEY : 658 ISSN : 0025-1909 En ligne : http://mansci.journal.informs.org/cgi/content/abstract/55/12/1985?maxtoshow=&hit [...]