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61.
In this paper, we predict that venture capital (VC) backed initial public offerings (IPOs) will attract more attention than non-VC-backed IPOs, as VCs offer important signals to investors searching for information about entrepreneurial firms. We use a measure developed by Google (i.e., Trends) to capture the spikes in investors' attention experienced by firms in the time period surrounding their IPOs. Our results demonstrate that firms backed by VCs enjoy a far greater spike in attention than their counterparts. Furthermore, we find that firms with more prominent VCs, a larger number of VCs, and VCs situated at farther geographic distances exhibit significantly greater spikes in investors’ attention during the week of their IPO. Combined, the findings show a clear demarcation between entrepreneurial firms with or without VC backing, they bring to the fore new upshots stemming from the relationship between VCs and entrepreneurial firms, and they raise new potential questions on this relationship and beyond. 相似文献
62.
Katherine R. Allen Rosemary Blieszner Karen A. Roberto 《Journal of marriage and the family》2000,62(4):911-926
Research on families in the middle and later years came into its own during the 1990s, documenting the complexity, malleability, and variety of older family connections. We examined 908 articles on family gerontology topics, observing 4 trends: Conceptually, an appreciation for pluralism and resilience as individuals and families age is apparent. Theoretically, life course, feminist, socioemotional selectivity, and family solidarity theories are increasingly applied to intergenerational family relations. Methodologically, new interest in qualitative methods for studying diverse groups has improved the depth with which aging studies can account for variability in old age; new quantitative methodologies have allowed greater sophistication in dealing with longitudinal data. Substantively, there is greater understanding of family caregiving, social support, parent‐child relationships, marital transitions, and grandparenting relationships. The field is poised to take even greater risks in fulfilling the promise of studying linked lives over time. 相似文献
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65.
This study explores the role of multiorganizational fields in recruitment to social movements. We study applicants to the 1964 Mississippi Freedom Summer project from two sites: the University of California at Berkeley and the University of Wisconsin at Madison. Using network analysis, we develop a model of recruitment that predicts participation on the basis of the structural positions of individuals within the multiorganizational fields, as well as on the basis of individual background factors. We also study the role that the recruitment context plays, by comparing the results at these two universities. Independent of the individual background factors, structural position in the multiorganizational field predicts participation in Freedom Summer at Wisconsin, but not at Berkeley. The effects of individual background factors on participation are also contingent on the recruitment context. We discuss the theoretical implications of our results for the study of the effects of multiorganizational fields and recruitment contexts on participation in social movements. 相似文献
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67.
Roberto Rossi S. Armagan Tarim Brahim Hnich Steven Prestwich Semra Karacaer 《Journal of Combinatorial Optimization》2010,19(3):325-346
The problem of finding the optimal timing of audit activities within an organisation has been addressed by many researchers.
We propose a stochastic programming formulation with Mixed Integer Linear Programming (MILP) and Constraint Programming (CP)
certainty-equivalent models. In experiments neither approach dominates the other. However, the CP approach is orders of magnitude
faster for large audit times, and almost as fast as the MILP approach for small audit times. This work generalises a previous
approach by relaxing the assumption of instantaneous audits, and by prohibiting concurrent auditing. 相似文献
68.
The scale-up method estimates the size of hard to count subpopulations. This method is based on the idea that the proportion of subjects in a subpopulation E known to each member of the general population T is the same as the proportion of members of E belonging to general population T. 相似文献
69.
Roberto Baiocco Jessica Pistella Marco Salvati Salvatore Ioverno Fabio Lucidi 《Journal of homosexuality》2020,67(4):489-512
ABSTRACTThis study describes the process of developing and validating the Sexual Prejudice in Sport Scale (SPSS), which is a multidimensional instrument developed to assess attitudes toward lesbians and gay men (LG) in sports. The authors conducted two studies: first, to establish the factor structure of the SPSS on 297 heterosexual athletes; and, second, to test the reliability and validity of the resulting 19-item scale on a sample of 311 heterosexual and 160 LG athletes. Exploratory factor analysis of an initial item pool yielded three factors: open rejection, which assesses the blatant prejudice expressed toward LG people; denial of visibility, which evaluates attitude toward the coming out of LG people; and gendering performance, which corresponds to gender stereotypes about performance/skills of LG people. A confirmatory factor analysis was conducted to assess the stability of the SPSS. The authors documented internal consistency, test-retest stability, and convergent/divergent validity. Implications and directions for future research are discussed. 相似文献
70.
On-line process control consists of inspecting a single item for every m (integer and m ≥ 2) produced items. Based on the results of the inspection, it is decided whether the process is in-control (the fraction of conforming items is p 1; State I) or out-of-control (the fraction of conforming items is p 2 < p 1; State II). If the inspected item is non conforming, it is determined that the process is out-of-control, and the production process is stopped for an adjustment; otherwise, production continues. As most designs of on-line process control assume a long-run production, this study can be viewed as an extension because it is concerned with short-run production and the decision regarding the process is subject to misclassification errors. The probabilistic model of the control system employs properties of an ergodic Markov chain to obtain the expression of the average cost of the system per unit produced, which can be minimised as a function of the sampling interval, m. The procedure is illustrated by a numerical example. 相似文献