Cointegrated VARMA models can be parameterized by using the echelon form, which is characterized by the Kronecker indices. Three diierent methods for estimating the Kronecker indices of cointegrated echelon form VARMA models are discussed and compared. They have the common feature of estimating the individual equations of the system separately and using order selection criteria. The small sampl...

This paper explores the application of constrained clustering algorithms to inventory grouping based problems. Our research in this area is based upon a segmentation methodology that considers operationally relevant part attributes. In this paper, we present a brief review of literature on multi-echelon inventory models, and clustering applications to inventory segmentation. Finally, we discuss...

This paper estimates some of the parameters of the Schwartz and Moon (2001)) model using cross-sectional data. Stochastic costs, future financing, capital expenditures and depreciation are taken into account. Some special conditions are also set: the speed of adjustment parameters are equal; the implied half-life of the sales growth process is linked to analyst forecasts; and the risk-adjustmen...

Given the emergence of two-echelon distribution systems in several practical contexts, this paper tackles, at strategic level, a network design problem under uncertainty. This is defined as stochastic multi-period capacitated location-routing (2E-SM-CLRP). It considers partitioned into two echelons: each echelon involves specific location-assignment-transportation schema that must cope with fut...

A Vickers M300 analyser has been successfully installed in a busy hospital laboratory. A permanent team of operators is used, but this introduces problems for staff rotation, particularly for educational purposes. The vials used for the collection of samples are an essential feature of the system, but they present many difficulties and are no longer used for collecting samples from outpatients,...

In this paper we compute the genuine savings indicators for the Republic of Ireland over the period 1995-2005. We expand and improve existing World Bank's estimates by: a) using data collected from official Irish sources; b) employing the net present value method to assess resource depreciation; c) including external costs from SO(2) and NOx emissions; and d) estimating human capital accumulati...

Little is known about the nature of physical capital in the less-developed countries. This article addresses the lack of empirical study related to depreciation rates, which are a neglected but important ingredient of both micro and macro models and empirical analyses. Based on rich establishment-level survey data, and using a straightforward econometric approach, I estimate depreciation rates ...

This paper considers a single-echelon, continuous review, inventory system with a warehouse facing compound Poisson customer demand. The replenishment lead-time is constant. Demand that cannot be met directly is backordered. There are standard linear holding and backorder costs but no set-up or ordering cost. It is assumed that the demand process starts at a certain given time. Consequently, be...

This paper examines the cost-reduction effect of “postponed” routing decisions in a two-echelon supply chain. When a delivery vehicle leaves the warehouse with system replenishment quantities, it sequentially makes routing decisions to choose the next retailer to visit. To measure this effect this paper studies combined vehicle routing and inventoryallocation policies designed to minimize total...