This paper explores the random environment with two classes of suppliers and impulse customers. The system’s greatest inventory size is S, it has an infinitely large orbit. In this case, there are categories suppliers: temporary regular suppliers. Whenever approaches r, we place on order Q1 (=S?r) unit items to a supplier. Similarly, when level drops s (<Q1<r), for Q2 (=S?s>s+1) units ...

In this paper we consider processing of global queries posed over information spaces populated by information resources that may advertise their contents in terms of global domain-speciic ontologies. We describe a technique to identify what portions of a user's query may not be answered by a set of available information agents. This is achieved by reasoning over the advertisements of the agents...

This paper empirically identifies a channel through which transport infrastructure improves the efficiency of an economy: reducing inventory stock. To deal with potential endogeneity, we introduce two identification tests. Applying them to a large panel data set on Chinese manufacturers from 1998 to 2007, we find that the dramatic improvement in China’s road transportation network has significa...

This paper examines the recent experience with insurance and other risk-financing instruments in developing countries in order to gain insights into the effectiveness of these instruments in reducing economic insecurity. Insurance and other risk financing strategies are viewed as efforts to recover from negative income shocks through risk pooling and transfer. Specific examples of public-privat...

Understanding the potential impacts of climate change on economic outcomes requires knowing how agents might adapt to a changing climate. We exploit large variation in recent temperature and precipitation trends to identify adaptation to climate change in US agriculture, and use this information to generate new estimates of the potential impact of future climate change on agricultural outcomes....

due to contiguous city of ravar with lut and dasht-e kavir desert, and weather conditions, water is one of the rarest agricultural inputs in this city. pistachio allocates 90% of garden and 73% of agricultural lands of the city and it is the most important agricultural product in this region. a major source of agricultural water supply in this area is groundwater. low price of water on one side...

OBJECTIVES Modernising Medical Careers (MMC) emerged in response to acknowledged problems in training in the Senior House Officer grade. The objective of this study was to assess the effect of the Foundation Year 2 (F2) training programme on career orientation in the Northern Ireland Deanery. METHODS A prospective survey-based study was conducted for all F2 doctors participating in the Northe...

W e show simple yet optimal results to update the inventory/capacity levels, expected profit, fill rates, and service levels of substitutable resources in response to an updating of the mean demand forecasts for the resources. We find that a change in the mean demand of one resource does not affect the optimal inventory level of any other resource. The results are obtained for demands with loca...

We examine inventory adjustment in the U.S. manufacturing sector using quarterly rmlevel data over the period 1978{97. Our evidence indicates that the inventory investment process is nonlinear and asymmetric, results consistent with a nonconvex adjustment cost structure. The inventory adjustment process di ers over the business cycle: for a given level of excess inventories, rms disinvest more ...

This paper identifies the criteria for dynamic synchronization of the movement of agents who make intermittent adjustment to inventory stocks, leading to “harmonic resonance” rather than cancellation. I use a discrete Markov process model of (S,s) inventory adjustment to establish a theoretical framework for the aggregate dynamics and use simulations to demonstrate the distribution effects of a...