Compared to automated entities, human trustees have two distinct characteristics: 1) they are resource constrained (with limited time and effort to serve requests), and 2) their utility is not linearly related to income. Existing research in reputation-aware task delegation did not consider these two issues together. This limits their effectiveness in humanagent collectives such as crowdsourcin...

The amount of conspicuous canopy dieback in all central Westland southern rata-kamahi forests east of the Alpine Fault, between 500 m altitude and treeline, was assessed and mapped from aerial photographs taken in 1984-85 and verified by aerial reconnaissance of selected areas in 1988. At least 20% of all canopy trees, predominantly southern rata (Metrosideros umbellata) and Hall's totara (Podo...

We study a sequential investment model and offer a theory of the sunk cost fallacy as an optimal response to limited memory. As new information arrives, a decision-maker may not remember all the reasons he began a project. The initial sunk cost gives additional information about future net profits and should inform subsequent decisions. We show that in different environments, this can generate ...

In this article, by considering both a limited number of failure replacements and random working cycles as warranty terms, hybrid (HW) is designed from the manufacturer’s point view to warrant product that does successive projects at cycles. The cost produced HW derived analyzed. By defining warrants product, two types post-warranty replacement models are investigated consumer’s ensure reliabil...

Increased dieback in Westland rata (Metrosideros umbellata) kamahi (Weinmannia racemosa) forests has been linked to the build-up of populations of the Australian brush-tailed possum (Trichosurus vulpecula). Within these forests young even-aged stands are observed to be more resilient to dieback than older stands. The effect of possum browsing on individual rata trees was related to the level of...

Employing remanufactured and refurbished products are among the new strategies that companies used to raise their profits as well as protects environment. Although used product equipment gives an opportunity to purchase latest technology, customers are doubtful about quality and reliability of these products. Because of limitation that developing countries faces in buying new products, some cou...