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61.
Statistics and Computing - Multiple hypothesis tests are often carried out in practice using p-value estimates obtained with bootstrap or permutation tests since the analytical p-values underlying... 相似文献
62.
Georg Man 《Journal of applied statistics》2018,45(5):845-867
Jointness is a Bayesian approach to capturing dependence among regressors in multivariate data. It addresses the general issue of whether explanatory factors for a given empirical phenomenon are complements or substitutes. I ask a number of questions about existing jointness concepts: Are the patterns revealed stable across datasets? Are results robust to prior choice and do data characteristics affect results? And importantly: What do the answers imply from a practical vista? The present study takes an applied, interdisciplinary and comparative perspective, validating jointness concepts on datasets across scientific fields with focus on life sciences (Parkinson's disease) and sociology. Simulations complement the study of real-world data. My findings suggest that results depend on which jointness concept is used: Some concepts deliver jointness patterns remarkably uniform across datasets, while all concepts are fairly robust to the choice of prior structure. This can be interpreted as critique of jointness from a practical perspective, given that the patterns revealed are at times very different and no concept emerges as overall advantageous. The composite indicators approach to combining information across jointness concepts is also explored, suggesting an avenue to facilitate the application of the concepts in future research. 相似文献
63.
Structured Coupling of Probability Loss Distributions: Assessing Joint Flood Risk in Multiple River Basins 总被引:1,自引:0,他引:1
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Anna Timonina Stefan Hochrainer‐Stigler Georg Pflug Brenden Jongman Rodrigo Rojas 《Risk analysis》2015,35(11):2102-2119
Losses due to natural hazard events can be extraordinarily high and difficult to cope with. Therefore, there is considerable interest to estimate the potential impact of current and future extreme events at all scales in as much detail as possible. As hazards typically spread over wider areas, risk assessment must take into account interrelations between regions. Neglecting such interdependencies can lead to a severe underestimation of potential losses, especially for extreme events. This underestimation of extreme risk can lead to the failure of riskmanagement strategies when they are most needed, namely, in times of unprecedented events. In this article, we suggest a methodology to incorporate such interdependencies in risk via the use of copulas. We demonstrate that by coupling losses, dependencies can be incorporated in risk analysis, avoiding the underestimation of risk. Based on maximum discharge data of river basins and stream networks, we present and discuss different ways to couple loss distributions of basins while explicitly incorporating tail dependencies. We distinguish between coupling methods that require river structure data for the analysis and those that do not. For the later approach we propose a minimax algorithm to choose coupled basin pairs so that the underestimation of risk is avoided and the use of river structure data is not needed. The proposed methodology is especially useful for large‐scale analysis and we motivate and apply our method using the case of Romania. The approach can be easily extended to other countries and natural hazards. 相似文献
64.
Oto Potluka Martin Spacek Georg von Schnurbein 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2017,28(5):2200-2223
To fulfil their role, non-profit organizations (NPOs) need sufficient capacities. These include, first and foremost, financial capacity. EU Cohesion Policy commands financial resources of 351.8 bn. EUR. The EU is also willing to support NPOs from this source. With such considerable funding, the research questions arise: How much money have NPOs received? What are the effects of such assistance on the financial capacities of NPOs? On a sample of 2715 non-profit organizations in the Czech Republic, we have found that EU subsidies have a positive impact on financial capacities, measured as real assets. It is caused by using EU funds for investment. We have not proved an effect on short-term financial capacities measured on revenues. Moreover, the distribution of financial support among PBOs is unequal as 4% of NPOs collected 80% of subsidies due to differences in skills among NPOs’ managers. 相似文献
65.
Social Indicators Research - The negative linkage between income inequality and social trust is widely acknowledged. Despite this consensus, it remains unclear at what level of aggregation income... 相似文献
66.
von Schnurbein Georg Rey-Garcia Marta Neumayr Michaela 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2021,32(2):185-193
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - This article is intended as the leading article in a special issue devoted to the achievements, limitations, opportunities... 相似文献
67.
68.
Matthias Georg Will Ingo Pies 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2017,28(3):1078-1109
Within academic research, more and more scholars reveal the ambivalence of NGOs—the sometimes constructive, sometimes destructive role they play in solving societal problems. In this paper, we present a discourse analysis that illustrates how NGOs’ campaigning may undermine their reputation and advocacy function. We conclude that such discourse failures are frequently not merely an accidental by-product, but rather a not-intended consequence of deliberate NGOs’ campaigns. By applying ideas from political economy, we make particular note of probable discourse failures when campaigns attempt to deal with complex issues in an environment rife with wide-spread prejudices and where the NGO’s work is transparent. We present collectively institutionalized commitments for NGOs and commitment services enforced by political organizations as instruments that are suitable for increasing public accountability of the NGO sector. In conclusion, we argue that further research can benefit from systematically analyzing the interdependencies between discourses and institutions. 相似文献
69.
This paper extends an optimal frequency domain test for the detection of synchronous patterns in multiple time series to the case of fuzzy patterns, which are not confined to single frequencies or narrow frequency bands. Applying this extension to corn futures with different delivery dates, we obtain significant results only for the spreads between the different contracts but not for the original contracts, which is an indication that spread trading has the advantage of increased predictability. 相似文献
70.
Compion Sara Meijs Lucas Cnaan Ram A. Krasnopolskaya Irina von Schnurbein Georg Abu-Rumman Samir 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2022,33(3):472-482
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - In this article, we are concerned with the recruitment potential of one-off episodic events for attracting and retaining... 相似文献