This article focus on the behaviour of a multi-product batch production line with fixed capacity which is scheduled according to inaccurate inventories (IRI). We assume an unlimited supply of raw materials and a constant demand for the different finished goods. The ordering policy of this production line is based on a (Q,R) continuous review, lost-sales inventory model and on given priority for...

BACKGROUND HIV-1 drug resistance can be measured with phenotypic drug-resistance tests. However, the output of these tests, the resistance factor (RF), requires interpretation with respect to the in vivo activity of the tested variant. Specifically, the dynamic range of the RF for each drug has to be divided into a suitable number of clinically meaningful intervals. METHODS We calculated a su...

Long-short strategies are one of the most successful tools, applied by hedge funds manager. One under-evaluated stock is bought (long position) and an over-evaluated stock is sold (short position) at the same time. After a short term, when the values of the stocks are as expected, profit can be realized by a closing transaction. The possibility to find first obvious overand underevaluated stock...

T his paper studies echelon stock (R, nQ) policies in serial production/inventory systems with stochastic demand. We provide a recursive procedure to compute the steady state echelon inventory levels of the systems, which can be used to evaluate the long-run average holding and backorder costs as well as other performance measures. The procedure is based upon an observation of a relationship be...

In this paper, we develop an economic production quantity (EPQ) model under machine breakdown and two types of repair (corrective and preventive). also, study the simultaneous effect of holding safety stock and purchasing policy. In order to avoid shortages occurring as a result of the random repair time, in addition to keep safety stock, we suppose that the manufacturer could purchase some qua...

The link between stock returns and economic growth has been an important research topic in the financial economic literature. The purpose of this study is to employ a threshold vector autoregressive (TVAR) approach in order to investigate the non-linear relationship between stock returns and output growth in the four East Asian countries: Taiwan, Japan, Korea, and Malaysia. The causality betwee...

This paper focuses on investigating the impacts of novel coronavirus (COVID-19) Canadian stock market volatility from a time-varying parameter model point view.

This paper studies the impact of labor ‡exibility on optimal life-cycle portfolio decisions, particularly the ability to change industries or …rms within industries. The model addresses two frequently observed portfolio behaviors that are seemingly inconsistent with rational portfolio choice. The …rst is the tendency of workers and entrepreneurs to hold their company’s stock. The second is the ...