Supermarket sweep

Supermarket Choice and Supermarket Competition in Market Equilibrium ¤

Multi-store ...rms are common in the retailing industry. Theory suggests that cross-elasticities between stores of the same ...rm enhance market power. To evaluate the importance of this e¤ect in the UK supermarket industry, we estimate a model of consumer choice and expenditure using three data sources: pro...t margins for each chain, a survey of consumer choices, and a data set of store chara...

Lost in the supermarket.

Recently I witnessed an elderly lady in my local supermarket, fighting back the tears while her husband looked on blankly. The cause of her distress was and remains totally unknown to me. Maybe the couple had had a trivial argument over what brand of yoghurt to buy. But for some reason I was deeply moved by the scene, and it set me off thinking at a tangent. Each of our lives is an unpredictabl...

Implicit Sweep

Mark DURING Sweep rather than Mark THEN Sweep

Garbage Collection frees the programmer from the burden of explicitly deallocating unused data. This facility induces a considerable overhead but also causes some delays that may aaect real-time applications. Guaranteed throughput (with at most short and predictable delays) is needed in many applications such as plane or plant control and requires at least a worst case analysis to identify the ...

Block-Structured Supermarket Models

Supermarket models are a class of parallel queueing networks with an adaptive control scheme that play a key role in the study of resource management of, such as, computer networks, manufacturing systems and transportation networks. When the arrival processes are non-Poisson and the service times are non-exponential, analysis of such a supermarket model is always limited, interesting, and chall...