Preservation and Dissolution of the Target Firm's Embedded Ties in Acquisitions

Our study builds on extant theory on embeddness to concentrate on the process of preservation and dissolution of the target firm’s embedded ties in acquisitions. We identify four critical areas - communication, idiosyncratic investments, inter-personal relations and, personnel turnover – where managerial decisions taken during the acquisition process affect the components of the target firm’s embedded ties – trust, joint problem-solving and exchange of fine-grained information. The preservation or dissolution of an embedded tie depends ultimately on two specific tie-contingencies, the balance of power between the target firm and the embedded relation and interpretive processes at the inter-face between the two. Our findings have implications for the study of the dissolution of market ties as they point to different roles played by social and institutional forces, power asymmetries and competition in the dynamics of embedded ones. Finally, we encourage theory development in acquisition studies by positing the importance of interpretive processes and, more broadly, relational elements that span the boundaries of the parent-target dyad.Acquisitions;Embedded tie dynamics;Embedded ties

Screening Mothers: Representations of motherhood in Australian films from 1900 to 1988.

Although the position of mothers has changed considerably since the beginning of the twentieth century, an idealised notion of motherhood persists. The cinema provides a source of information about attitudes towards mothering in Australian society which is not diminished by the fact that mothers are often marginal to the narrative. While the study recognises that cinematic images are not unconditionally authoritative, it rests on the belief that films have some capacity to reflect and influence society. The films are placed in an historical context with regard to social change in Australian society, so that the images can be understood within the context of the time of the making and viewing of the films. The depictions of the mother are scrutinised with regard to her appearance, her attitude, her relationship with others and the expectations, whether explicit or implicit, of her role. Of particular significance is what happens to her during the film and whether she is punished or rewarded for her behaviour. The conclusions reached after analysis are used to challenge those ideas which assume that portrayals of motherhood are unchangeable and timeless. The study examines Australian feature films from 1900 to 1988. To augment its historical focus, it uses sociological, psychoanalytical and feminist theoretical writing with special relevance for motherhood and mothering practice. Looking at areas of importance to mothers, it comprises an exploration of what makes a mother good or bad; the significance of the birth of female and male children; the relationship of mothers to daughters; the mother's sexuality and the metaphor of the missing mother. It shows that images of motherhood on screen are organised according to political, social and economic requirements in the community. Further, films frequently show mothers in traditional roles which are useful for maintaining notions of patriarchal privilege in society. The analysis exposes stereotypical depictions of motherhood which are often inaccurate, unfair and oppressive to women

Less is Better: A cognitively inspired unsupervised model for language segmentation

Language users process utterances by segmenting them into many cognitive units, which vary in their sizes and linguistic levels. Although we can do such unitization/segmentation easily, its cognitive mechanism is still not clear. This paper proposes an unsupervised model, Less-is-Better (LiB), to simulate the human cognitive process with respect to language unitization/segmentation. LiB follows the principle of least effort and aims to build a lexicon which minimizes the number of unit tokens (alleviating the effort of analysis) and number of unit types (alleviating the effort of storage) at the same time on any given corpus. LiB’s workflow is inspired by empirical cognitive phenomena. The design makes the mechanism of LiB cognitively plausible and the computational requirement light-weight. The lexicon generated by LiB performs the best among different types of lexicons (e.g. ground-truth words) both from an information-theoretical view and a cognitive view, which suggests that the LiB lexicon may be a plausible proxy of the mental lexicon

Unsupervised text segmentation predicts eye fixations during reading

Words typically form the basis of psycholinguistic and computational linguistic studies about sentence processing. However, recent evidence shows the basic units during reading, i.e., the items in the mental lexicon, are not always words, but could also be sub-word and supra-word units. To recognize these units, human readers require a cognitive mechanism to learn and detect them. In this paper, we assume eye fixations during reading reveal the locations of the cognitive units, and that the cognitive units are analogous with the text units discovered by unsupervised segmentation models. We predict eye fixations by model-segmented units on both English and Dutch text. The results show the model-segmented units predict eye fixations better than word units. This finding suggests that the predictive performance of model-segmented units indicates their plausibility as cognitive units. The Less-is-Better (LiB) model, which finds the units that minimize both long-term and working memory load, offers advantages both in terms of prediction score and efficiency among alternative models. Our results also suggest that modeling the least-effort principle for the management of long-term and working memory can lead to inferring cognitive units. Overall, the study supports the theory that the mental lexicon stores not only words but also smaller and larger units, suggests that fixation locations during reading depend on these units, and shows that unsupervised segmentation models can discover these units

Optimal decentralized Kalman filter

The Kalman filter is a powerful state estimation algorithm which incorporates noise models, process model and measurements to obtain an accurate estimate of the states of a process. Implementation of conventional Kalman filter algorithm requires a central processor that harvests measurements from all the sensors in the field. Central algorithms have some drawbacks such as reliability, robustness and high computation which result in a need for non-central algorithms. This study takes optimality in decentralized Kalman filter (DKF) as its focus and derives the optimal decentralized Kalman filter (ODKF) algorithm, in case the network topology is provided to every node in the network, by introducing global Kalman equations. ODKF sets a lower bound of estimation error in least squares sense for DKF

Maturing Satellite Kinematics into a Competitive Probe of the Galaxy-Halo Connection

The kinematics of satellite galaxies moving in a dark matter halo are a direct probe of the underlying gravitational potential. Thus, the phase-space distributions of satellites represent a powerful tool to determine the galaxy-halo connection from observations. By stacking the signal of a large number of satellite galaxies this potential can be unlocked even for haloes hosting a few satellites on average. In this work, we test the impact of various modelling assumptions on constraints derived from analysing satellite phase-space distributions in the non-linear, 1-halo regime. We discuss their potential to explain the discrepancy between average halo masses derived from satellite kinematics and gravitational lensing previously reported. Furthermore, we develop an updated, more robust analysis to extract constraints on the galaxy-halo relation from satellite properties in spectroscopic galaxy surveys such as the SDSS. We test the accuracy of this approach using a large number of realistic mock catalogues. Furthermore, we find that constraints derived from such an analysis are complementary and competitive with respect to the commonly used galaxy clustering and galaxy-galaxy lensing observables.Comment: 24 pages, 15 figures; resubmitted to MNRAS after first referee repor