Strategy

This study reports on the ex-post performance of survivor REITs and RECs over a 14.5-year period covering several business cycles. The results show that the systematic risk and risk-adjusted returns of REITs and RECs are quite different, especially during periods of low growth in real GNP. Relative to the overall stock market, survivor REITs, in particular, equity REITs, exhibited less volatility and higher returns than previous studies revealed.

We consider a single-server queueing system with Poisson arrivals and general service times. While the server is up, it is subject to breakdowns according to a Poisson process. When the server breaks down, we need to repair the server immediately by initiating one of two available repair operations. The operating costs of the system include customer holding costs, repair costs and running costs. The objective is to find a corrective maintenance policy that minimizes the long-run average operating costs of the system. The problem is formulated as a semi-Markov decision process.

This article treats the dynamic lot size model with quantity discount in purchase price. We study the problem with two different cost structures: the all-units-discount cost structure and the incremental-discount cost structure. We solve the problem under both discount cost structures by dynamic programming algorithms of complexity O(T3) and O(T2), respectively, with T the number of periods in the planning horizon.

We consider distribution systems with a depot and many geographically dispersed retailers each of which faces external demands occurring at constant, deterministic but retailer specific rates. All stock enters the system through the depot from where it is distributed to the retailers by a fleet of capacitated vehicles combining deliveries into efficient routes. Inventories are kept at the retailers but not at the depot.

Our cities are on the move again. Pioneering observers of the urban landscape Bernard Frieden and Lynn Sagalyn delve into the inner workings of the new public entrepreneurship and public private partnerships that have revitalized the downtowns of such cities as Boston, San Diego, Seattle, St. Paul, and Pasadena. They bring a unique combination of political and economic expertise to their analysis of this hot new marketplace, depicting a generation of mayors and administrators who differ in style from their predecessors and who have a more informed relationship with developers.

We consider a single-server queueing system with Poisson arrivals and general service times. While the server is up, it is subject to breakdowns according to a Poisson process. When the server breaks down, we may either repair the server immediately or postpone the repair until some future point in time. The operating costs to the system include customer holding costs, repair costs and running costs. The objective is to find a corrective maintenance policy which minimizes the long-run average operating costs of the system. The problem is formulated as a semi-Markov decision process.