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191.
Francesca Fiori Francesca Rinesi Antonella Pinnelli Sabrina Prati 《Population research and policy review》2013,32(3):373-413
The present study addresses the issue of economic insecurity and its relationship with the reproductive plans of 5,358 Italian women in couples who have recently had their first child. Data were sourced from the ISTAT Sample Survey on Births, 2005 edition. This article’s originality lies in the conceptualization of economic insecurity and the investigation of its effects on fertility intentions. We propose to capture economic insecurity by considering both the insecurity associated to the two partners’ employment status and a variety of aspects that contribute to the household’s ability to cope with possible unpredictable future events. Then, we investigate whether and how economic insecurity shapes the fertility intentions of women over their entire reproductive life span. With specific respect to women who intend to have one additional child only, we also observe the effect of economic insecurity on their intention to give birth sooner (i.e., within the next 3 years) or later. Our data show the existence of a critical factor in the passage from the generic fertility intentions to the contingent plan to have a child in the next 3 years: only half of women with one child who intend to follow the two-child family model feel ready to plan to have a second child in the next 3 years. The study also reinforces an argument that is frequently made: fertility intentions over the entire lifetime are less conditioned upon contingent constraints, and are often more closely related to individual traits and/or preferences. 相似文献
192.
We use a simple version of the Psychological Expected Utility Model (Caplin and Leahy, Q J Econ 116:55–80, 2001) to analyze the optimal choice of information accuracy by an individual who is concerned with anticipatory feeling. The individual
faces the following trade-off: on the one hand information may lead to emotional costs, on the other the higher the information
accuracy, the higher the efficiency of decision-making. We completely and explicitly characterize how anticipatory utility
depends on information accuracy, and study the optimal amount of information acquisition. We obtain simple and explicit conditions
under which the individual prefers no-information or partial information gathering. We show that anomalous attitudes towards
information can be more frequent and articulated than previously thought. 相似文献
193.
Alex Ocampo Heinz Schmidli Peter Quarg Francesca Callegari Marcello Pagano 《Pharmaceutical statistics》2021,20(6):1265-1277
Patients often discontinue from a clinical trial because their health condition is not improving or they cannot tolerate the assigned treatment. Consequently, the observed clinical outcomes in the trial are likely better on average than if every patient had completed the trial. If these differences between trial completers and non-completers cannot be explained by the observed data, then the study outcomes are missing not at random (MNAR). One way to overcome this problem—the trimmed means approach for missing data due to study discontinuation—sets missing values as the worst observed outcome and then trims away a fraction of the distribution from each treatment arm before calculating differences in treatment efficacy (Permutt T, Li F. Trimmed means for symptom trials with dropouts. Pharm Stat. 2017;16(1):20–28). In this paper, we derive sufficient and necessary conditions for when this approach can identify the average population treatment effect. Simulation studies show the trimmed means approach's ability to effectively estimate treatment efficacy when data are MNAR and missingness due to study discontinuation is strongly associated with an unfavorable outcome, but trimmed means fail when data are missing at random. If the reasons for study discontinuation in a clinical trial are known, analysts can improve estimates with a combination of multiple imputation and the trimmed means approach when the assumptions of each hold. We compare the methodology to existing approaches using data from a clinical trial for chronic pain. An R package trim implements the method. When the assumptions are justifiable, using trimmed means can help identify treatment effects notwithstanding MNAR data. 相似文献
194.
Francesca Polletta 《Qualitative sociology》1998,21(4):419-446
Study of stories and storytelling in social movements can contribute to our understanding of recruitment that takes place outside formal movement organizations; social movement organizations' ability to withstand strategic setbacks; and movements' impacts on mainstream politics. This paper draws on several cases to illuminate the yields of such study and to provide alternatives to the overbroad, uncritical, and astructural understandings of narrative evident in some recent writings. It also urges attention to the role of literary devices in sociological analyses of collective action. 相似文献
195.
There is a commonly held conviction among governance scholars and practitioners that increasing the number of non‐executive directors may have beneficial effects on board practices. This view has gained momentum after each wave of scandals. Given the relevance of the issue in governance studies and practices, the aim of this paper is to investigate how independent, competent and incentivized non‐executive directors should be according to governance scholars and board best practices. To answer this question, we conducted a review of the literature on non‐executive directors. We then collected corporate governance codes developed worldwide at the end of 2005, and made a comparative analysis of their recommendations about the independence, the competencies and the incentives of non‐executive directors. Our results show that (i) non‐executive directors' independence is a commonly recommended governance practice, the meaning of which differs widely among countries; (ii) non‐executive directors' competencies and incentives are not considered a governance issue to be regulated in detail; (iii) agency theory and the search for appropriate board demography tend to dominate the recommendations of governance literature and codes. Our findings have implications for both research and practice. 相似文献
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Francesca Polletta 《Sociological inquiry》1997,67(4):431-450
Recent analyses of the cultural dimensions of protest have gone some distance in correcting the structuralist and instrumentalist biases of early resource mobilization and political process models. They remain limited, however, by their retention of dichotomous conceptions of culture and structure in the emergence of protest, of cultural and instrumental orientations in ongoing collective action, and of cultural and political targets of protest. As a result, they have neglected, respectively, continuities between structured inequalities and the movement challenges that are made to them, the cultural shaping of instrumentally rational decisionmaking, and the strategic possibilities that lay in cultural challenge made within the sphere of institutional politics. I draw on recent theorizing in the sociology of culture and on several case studies of collective action in order to highlight these lacunae and to propose analytical alternatives. 相似文献
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