منابع مشابه
Clubs within clubs:
This paper deals with two examples of macro-regions in the EU: the Benelux and the Council of the Baltic Sea States (CBSS). Building on the distinction between “old” and “new” regionalism, it discusses some characteristics of regions in general, and of sub-integration schemes within the EU in particular. These characteristics are applied to the two regions at hand. From this application it foll...
متن کاملEditorials Carrots, sticks and tuberculosis
The spectrum of nitrofurantoin lung injury continues to widen. The case histories are presented of two patients who developed lung disease associated with the use of nitrofurantoin with histological features of bronchiolitis obliterans organising pneumonia (BOOP), a rare but recognised form of drug induced injury. The two middle aged women presented with respiratory symptoms after prolonged tre...
متن کاملSticks and Clubs
We study combinatorial principles known as stick and club. Several variants of these principles and cardinal invariants connected to them are also considered. We introduce a new kind of side-by-side product of partial orderings which we call pseudo-product. Using such products, we give several generic extensions where some of these principles hold together with ¬CH and Martin’s Axiom for counta...
متن کاملCliques and Clubs
Clubs are generalizations of cliques. For a positive integer s, an s-club in a graph G is a set of vertices that induces a subgraph of G of diameter at most s. The importance and fame of cliques are evident, whereas clubs provide more realistic models for practical applications. Computing an s-club of maximum cardinality is an NP-hard problem for every fixed s ≥ 1, and this problem has attracte...
متن کاملSticks and Carrots in Procurement∗
We study differently framed incentives in dynamic laboratory buyerseller relationships with multi-tasking and endogenous matching. The experimental design tries to mitigate the role of social preferences and intrinsic motivation. Absent explicit incentives, effort is low in both tasks. Their introduction boosts efficiency substantially increasing effort in the contractible task, mildly crowding...
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ژورنال
عنوان ژورنال: Avian Conservation and Ecology
سال: 2010
ISSN: 1712-6568
DOI: 10.5751/ace-00430-050214