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Causal quadrantal-type spatial ARMA(p, q) models with independent and identically distributed innovations are considered. In order to select the orders (p, q) of these models and estimate their autoregressive parameters, estimators of the autoregressive coefficients, derived from the extended Yule–Walker equations are defined. Consistency and asymptotic normality are obtained for these estimators. Then, spatial ARMA model identification is considered and simulation study is given. 相似文献
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The ‘good mother’ struggles: Obstacles to the attainment of motherhood ideals among adult women formerly placed in residential care
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We analysed narratives of motherhood produced by 13 women who were involved with the welfare system or the justice system during adolescence. The original contribution of our study was its focus on mothers who were turning age 30, so they were not in that period of generalized instability that characterizes the transition from care and into adulthood. This qualitative study was part of a larger study on French‐Canadian adolescents with a history of residential care. Semi‐directed interviews were conducted with 13 women, more than 15 years after their admission to residential care. Our data highlights that motherhood can contribute to the vulnerability of women who were involved with the welfare or the justice system as adolescents. Our results suggest that in order to shed a perceived deviant label and to compensate for the adverse events they experienced, they pursue internalized ideals of “good motherhood” that translate into restrictions and strain. Furthermore, they tend to refrain from allowing people into their lives and asking for help for fear of being judged. Yet, as their children are getting older and exhibiting problem behaviors of their own, the questioning of their parental practices and skills only becomes more intense. 相似文献
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This paper studies the asymptotic behavior of Fisher's information for a Lévy process discretely sampled at an increasing frequency. As a result, we derive the optimal rates of convergence of efficient estimators of the different parameters of the process and show that the rates are often nonstandard and differ across parameters. We also show that it is possible to distinguish the continuous part of the process from its jumps part, and even different types of jumps from one another. 相似文献
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Jussi Hätönen 《Journal of International Management》2009,15(1):61-76
Offshore outsourcing is one of the most sustained management strategies of the 21st century, and researchers are paying attention to this contemporary, yet complex and controversial phenomenon. Despite the increasing amount of research, from the theoretical and managerial perspectives several important aspects remain inconclusive. The focus in this article is on theory development in two complex areas. The first concerns the location, the idea being to identify the factors that influence the final decision, in which ownership is not the mode of control. Secondly, the aim is to explore whether offshore outsourcing facilitates international expansion. Through a process of theoretical rationalization and inductive case analysis propositions are arrived at according to which non-locational factors most heavily impact the firm's decision to outsource offshore and its subsequent internationalization. The results indicate that this subsequent internationalization may be a by-product of offshore outsourcing, or it may be an intentional strategy. The article thus adds new aspects to the existing theory on outsourcing decision-making, which forms the basis of an emergent theory for future academic research. 相似文献
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Catherine Benoît 《Mobilities》2020,15(2):220-240
ABSTRACTThis article argues that the French overseas territories of the Caribbean and Indian Ocean, which are also European ‘outermost regions,’ make up the first borders of ‘Fortress Europe,’ geographically, historically and legislatively. Since the 1980s, a set of laws, described as ‘laws of exception,’ place the majority of the foreign residents in a state of ‘illegality.’ These overseas territories are in the vanguard of a French ‘regime of deportation’ that targets foreign nationals, indigenous populations and former colonial subjects. They are places of experimentation for legal exceptions, which are then implemented in metropolitan France. This paper will analyze how the reinforcement of borders contradicts the popular and scholarly representation of the Caribbean and the Indian Ocean as sites of mobility. 相似文献
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This article is based upon an assignment carried out by the author concerned with organization for planning in a company formed as a result of a merger. Possible organizational solutions are discussed and the recommendations of the author and his colleague outlined. 相似文献
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