In this paper, we shall construct an inventory model with partially backlogged shortage and Poisson demand. In the shortage period, we assume that lost sale is dependent on the length of waiting time. Under these assumptions, we find the optimal planning and shortage periods such that the...

In this article, we generalize Lev and Weiss's (1990) finite horizon economic order quantity (EOQ) model with cost change to the inventory system with deterioration. Supplier announces some or all of cost parameters may change after a decided time. Depending on whether the inventory is depleted...

This article applies the threshold autoregressive model proposed by Caner and Hansen (2001) to examine both linearity and stationarity of China's real exchange rate vis-à-vis her 9 trading partner countries over the period of January 1986 to October 2009. Two main conclusions are drawn....

This study applies the stationarity test with a Fourier function proposed by Becker et al. to test the validity of long-run purchasing power parity (PPP) in a sample of transition countries from January 1995 to December 2008. The empirical results indicate that PPP does not hold for most of the...

In this paper, we present an inventory model for deteriorating items with time varying demand and deterioration rates when the credit period depends on the retailer's ordering quantity. We also provide simple solution procedures for finding the optimal replenishment period and show in a rigorous...