We examine the estimation of the memory parameter d of I(d) series, by fitting an auto-regressive AR(k) representation where k approaches infinity simultaneously with the observed series length n. Under some conditions on the growth of k with respect to n, and on the short memory component of...

Timing-independence implies that individuals are indifferent between a sequential choice problem and a planned choice problem which are strategically equivalent except for the timing of resolution of the uncertainty. This paper reports an experiment in which we investigate whether the timing of...

We analyse the demand for and the supply of night visits in primary care. A model of demand management by general practitioners and of their choice between meeting demand by making visits themselves or passing them to commercial deputising services is presented. Demand and supply equations are...

We use a simple Lotka-Volterra model of the disease transmission process to analyse the dynamic population structure when a vaccine is available at a constant price through time which gives partial immunity to the disease. In contrast to earlier results for the full immunity case, we find that...