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The effectiveness of NATO conditionality for institutional reforms is highly controversial. Some papers argue that any effect this conditionality might have had may be due to endogeneity effects, i.e. NATO may have picked the winners. We argue that this is not the case. First, NATO-Mazedonia relations provide a case in point. Macedonia was granted entry into the Membership Action Plan (MAP) in 1999 due to country’s strategic importance. Only after the Ohrid agreement, effective conditionality set in and marked a switch in NATO strategy from security only towards institution building. Second, this is supported by econometric evidence based on panel data. An event study reveals that entry into NATO’s accession process was mainly driven by neighbourhood and good relations with the West. We conclude that empirical evidence clearly supports a stronger role of NATO’s political agenda, i.e., low entry barriers but strict accession conditionality.  相似文献   
3.
In urban areas, the inequitable distribution of transit systems and services has been shown to reproduce safety and environmental risks – potentially exacerbating preexisting inequities. Thus, how vulnerable populations access and utilize public transportation is of critical concern to urban scholars. This paper utilizes focus group data to explore how transit-dependent (particularly low-income) riders engage with the public transit system in Portland, Oregon. We illustrate specific ways in which transit-dependent riders experience marginalization and exclusion. We find that certain groups, particularly mothers with young children and those with disabilities are not well served by a public infrastructure oriented toward an ‘ideal rider’ who is an economically stable, able-bodied, white, male commuter. We conclude that a public infrastructure meant to serve all riders equitably, yet which fails to consider the unique experiences of marginalized transit users risks further amplifying existing social vulnerabilities and reinforcing gender, racial, and class inequalities.  相似文献   
4.
The paper examines the effect of income on mortality with respect to different health statuses and institutional characteristics of the health care system in the USA, Great Britain and West Germany. It is hypothesized that the nature of the theoretical contribution of income in explaining mortality risks changes on whether good or poor health is considered. Taking into account that the health care systems of the countries in question vary by their degree of household out-of-pocket expenditure, we expect an association between income and mortality that differs by country. The analysis is based on the German Socio-economic Panel (GSOEP), the British Household Panel Study (BHPS), and the Panel Study of Income Dynamics (PSID). The effect of income on mortality is found to be weakest when medical services are sought in the presence of poor health within the framework of a national health insurance that renders free primary health care (Great Britain, Germany). The effect is strongest when the provision of primary health care depends strongly on private expenditures (USA).  相似文献   
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An important task in after sales service is the provision of spare parts for durables. Due to its nature and dependence on earlier sales, the demand for spare parts is inherently dynamic and uncertain requiring for high procurement flexibility. During the product life cycle, inventory management of spare parts is performed efficiently under use of flexibility provided by existing production facilities. This situation completely changes once the OEM ceases production of the parent product. A prime option of procuring spare parts for the End-of-production period is to place a final order for parts when regular production ends. Besides low unit production costs, this option does not contain any flexibility, yielding a high risk of obsolescence of stored parts, and at the same time a high risk of not being able to satisfy all demand during the service period. In order to increase flexibility further options like extra production at higher unit cost or remanufacturing of components taken from used products could be used. After introducing the problem and a basic quantitative model, we evaluate flexibility properties of strategies using different combinations of the above options. In doing so we distinguish between quantity, time, and stock related flexibility. In a comprehensive numerical study it is investigated to which extent flexibility properties of the different strategies can contribute to their economic profitability.  相似文献   
6.
Clusterwise regression aims to cluster data sets where the clusters are characterized by their specific regression coefficients in a linear regression model. In this paper, we propose a method for determining a partition which uses an idea of robust regression. We start with some random weighting to determine a start partition and continue in the spirit of M-estimators. The residuals for all regressions are used to assign the observations to the different groups. As target function we use the determination coefficient R2wR^{2}_{w} for the overall model. This coefficient is suitably defined for weighted regression.  相似文献   
7.
This paper deals with facility location problems on graphs with positive and negative vertex weights. We consider two different objective functions: In the first one (MWD) vertices with positive weight are assigned to the closest facility, whereas vertices with negative weight are assigned to the farthest facility. In the second one (WMD) all the vertices are assigned to the nearest facility. For the MWD model it is shown that there exists a finite set of points in the graph which contains the locations of facilities in an optimal solution. Furthermore, algorithms for both models for the 2-median problem on a cycle are developed. The algorithm for the MWD model runs in linear time, whereas the algorithm for the WMD model has a time complexity of  O(n2)\mathcal{O}(n^{2}) .  相似文献   
8.
Health Risks of Energy Systems   总被引:1,自引:0,他引:1  
Health risks from fossil, renewable and nuclear reference energy systems are estimated following a detailed impact pathway approach. Using a set of appropriate air quality models and exposure-effect functions derived from the recent epidemiological literature, a methodological framework for risk assessment has been established and consistently applied across the different energy systems, including the analysis of consequences from a major nuclear accident. A wide range of health impacts resulting from increased air pollution and ionizing radiation is quantified, and the transferability of results derived from specific power plants to a more general context is discussed.  相似文献   
9.
Since the 80ies Michel de Certeau’s analyses of everyday life had influenced the development of Cultural Studies. For example the practices of consumption and reception were described as resistant tactics in the work of John Fiske. But many aspects of de Certeau’s complex theory were not considered. Against this background his works is surveyed in the context of theories of everyday life. The study shows that the potential of de Certeau’s critical cultural analysis has yet to be disclosed and realized. So he has developed a subtle theory of everyday practices, delineated a science of the singular and explored the relationships between the unconscious and everyday life/between utopia and everyday life.  相似文献   
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