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We implement a controlled, multi-site experiment to develop and test guidance principles for benefits transfers. These argue that when transferring across relatively similar sites, simple mean value transfers are to be preferred but that when sites are relatively dissimilar then value function transfers will yield lower errors. The paper also provides guidance on the appropriate specification of transferable value functions arguing that these should be developed from theoretical rather than ad-hoc statistical approaches. These principles are tested via a common format valuation study of water quality improvements across five countries. While this provides an idealised tested, results support the above principles and suggest directions for future transfer studies.  相似文献   
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In Cambodia, the interactions between large‐scale land investment and land titling gathered particular momentum in 2012–13, when the government initiated an unprecedented upland land titling programme in an attempt to address land tenure insecurity where large‐scale land investment overlaps with land appropriated by peasants. This paper is based on a spatially explicit ethnography of land rights conducted in the Samlaut district of north‐west Cambodia – a former Khmer Rouge resistance stronghold – in a context where the enclosures are both incomplete and entangled with post‐war, socially embedded land tenure systems. We discuss how this new pattern of fragmentation affects the prevailing dynamics of agrarian change. We argue that it has introduced new forms of exclusion and a generalized perception of land tenure uncertainty that is managed by peasants through the actualization of hybrid land tenure arrangements borrowing from state rules and local consensus. In contrast with common expectations about land formalization, the process reinforces the patterns of social differentiation initiated by land rent capture practices of early migrants and pushes more vulnerable peasants into seeking wage labour and resorting to job migration.  相似文献   
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IEEE 802.11s is the task group in the IEEE that is in the process of standardizing wireless mesh networks. A hot topic in this standardization effort concerns the need for additional medium access functionality beyond the basic IEEE 802.11 carrier sense multiple access with collision avoidance (CSMA/CA). In this paper, we discuss the connection between CSMA/CA and Dijkstra's classical Philosophers' problem, and its implications for the debate inside IEEE 802.11s. In an alternative view of this paper, we state some new mathematical models, theorems and conjectures related to the Philosophers' problem.  相似文献   
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