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211.
Statistical Methods & Applications - With reference to causal mediation analysis, a parametric expression for natural direct and indirect effects is derived for the setting of a binary outcome...  相似文献   
212.
Status-based affiliation represents a valuable resource in economic exchange. However, affiliation strategies introduce a status ordering paradox: whereas higher status actors seek to maintain status hierarchies, lower status actors strive to affiliate with more prestigious actors. In this paper, using original data on the network of social and professional ties among 72 hotel managers clustered in an Italian hotel district, we develop a theory of status-seeking behavior that involves the exchange of status for valued resources.  相似文献   
213.
Home is Another Country: Ethnic Identification in Philippine Homeland Tours   总被引:1,自引:0,他引:1  
Using data based mainly on 29 in-depth interviews with participants from three Philippine homeland tours, I conceptualize the process of ethnic identification through homeland tourism more precisely as the adoption of strategies aimed at symbolically demarcating grounds for informants’ belonging in the Philippines as Americans. This conceptualization highlights ethnic identification as a problem, one that must be “worked on” insofar as claims to ethnic identity must be substantiated. It is also a problem insofar as this work of belonging is displaced and misrecognized. In working to establish a connection with the homeland, I argue that my informants are working out their belonging in America within the terms of distinction set by multiculturalism.  相似文献   
214.
Statistical Methods & Applications - Conditional Autoregressive Value-at-Risk and Conditional Autoregressive Expectile have become two popular approaches for direct measurement of market risk....  相似文献   
215.
Diagnostic tools must rely on robust high-breakdown methodologies to avoid distortion in the presence of contamination by outliers. However, a disadvantage of having a single, even if robust, summary of the data is that important choices concerning parameters of the robust method, such as breakdown point, have to be made prior to the analysis. The effect of such choices may be difficult to evaluate. We argue that an effective solution is to look at several pictures, and possibly to a whole movie, of the available data. This can be achieved by monitoring, over a range of parameter values, the results computed through the robust methodology of choice. We show the information gain that monitoring provides in the study of complex data structures through the analysis of multivariate datasets using different high-breakdown techniques. Our findings support the claim that the principle of monitoring is very flexible and that it can lead to robust estimators that are as efficient as possible. We also address through simulation some of the tricky inferential issues that arise from monitoring.  相似文献   
216.
In this note I reply to the comments by Haimes et al. on my paper on the sensitivity analysis of the inoperability input‐output model. I make the case for a moment‐independent sensitivity analysis.  相似文献   
217.
Social Indicators Research - This study aims to analyze the psychometric properties of the Italian translation of the short form of the Utrecht Work Engagement Scale—Student version...  相似文献   
218.
Erectile dysfunction is a common disease characterized by endothelial dysfunction. The aetiology of ED is often multifactorial but evidence is being accumulated in favor of the proper function of the vascular endothelium that is essential to achieving and maintaining penile erection. Uric acid itself causes endothelial dysfunction via decreased nitric oxide production. This study aims to evaluate the serum uric acid (SUA) levels in 180 ED patients, diagnosed with the International Index of Erectile Function-5 (IIEF-5) and 30 non-ED control. Serum uric acid was analyzed with a commercially available kit using ModularEVO (Roche, Monza, Italy). Within-assay and between-assay variations were 3.0% and 6.0%, respectively. Out of the ED patients, 85 were classified as arteriogenic (A-ED) and 95 as non-arteriogenic (NA-ED) with penile-echo-color-Doppler. Uric acid levels (median and range in mg/dL) in A-ED patients (5.8, 4.3–7.5) were significantly higher (p?p?相似文献   
219.
Marco Percoco 《Risk analysis》2011,31(7):1038-1042
Natural and man‐made disasters are currently a source of major concern for contemporary societies. In order to understand their economic impacts, the inoperability input‐output model has recently gained recognition among scholars. In a recent paper, Percoco (2006) has proposed an extension of the model to map the technologically most important sectors through so‐called fields of influence. In the present note we aim to show that this importance measure also has a clear connection with local sensitivity analysis theory.  相似文献   
220.
Statistics and Computing - Post randomization methods are among the most popular disclosure limitation techniques for both categorical and continuous data. In the categorical case, given a...  相似文献   
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