Strategic delegation in a sequential model with multiple stages

We analyze strategic delegation in a Stackelberg model with an arbitrary number, n, of firms. We show that the n-1 last movers delegate their production decisions to managers whereas the first mover does not. Equilibrium incentive rates are increasing in the order with which managers select quantities. Letting u_i^* denote the equilibrium payoff of the firm whose manager moves in the i-th place, we show that u_n^*>u_{n-1}^*>...>u_2^*>u_1^*. We also compare the delegation outcome of our game with that of a Cournot oligopoly and show that the late (early) moving firms choose higher (lower) incentive rates than the Cournot firms.Comment: To appear in International Game Theory Review (IGTR), Vol. 13, No. 3 (2011) 1-1

Hybrid contracts in introductory linguistics

Wanting to shift the focus in the introductory linguistics classes in an access institution from teaching to learning, I created a tripartite (hybrid) contract that consists of three distinct tasks: labor-based tasks (collaborative forums and breakout activities); content-based tasks (assignments and final project on changing understandings about language) and self-regulated tasks (learning logs, metacognitive awareness surveys, capstone). This contract gives students agency and establishes a culture of “forgiveness” (while maintaining high standards), providing flexibility since my students’ life challenges can affect their academic performance

The service elimination process : an empirical investigation into the British financial services sector

The present study represents an in-depth empirical investigation into the service elimination process in the British financial services sector. It aims to make a contribution towards the concise development of the literature on service elimination and to provide empirically based recommendations, which can improve the way financial service elimination is practised. The theoretical part of the study focused first on a review of the characteristics of services in general and of financial services in particular and of the service range management activities of financial institutions. Second, the literature on product and service elimination was reviewed. The bulk of this material refers to conceptual propositions and empirical evidence on elimination from manufacturing settings, while conceptual and empirical material from service and financial service settings is alarmingly sparse. The presents tudy conceptualisedth e service elimination process as consisting of three broad stages, a) the pre-elimination stage, b) the actual service elimination decision-making process and c) the post-elimination stage. The study adopted a research approach based on the broad hypothesis that service elimination decisions are not made in a vacuum (as the limited literature on service and financial service elimination assumes explicitly or implicitly) but that they are influenced by contextual organisational and environmental characteristics of companies. Based on the above conceptualisations, the research objectives were to a) identify the content of the service elimination process (i. e., the decision variables involved in the various steps of the process) b) measure the relative importance/frequency of use of the above content and c) measure the influence of a set of contextual independent variables on the relative importance/frequency of use of the content of the service elimination process. To meet the above research objectives, a pluralistic research method was adopted. For the identification component of the research objectives qualitative research (in-depth interviews) was conducted, while for the measurement component quantitative research was conducted(mail survey). The findings indicated that service elimination decisions were the outcome of a multi-step process, which with very few exceptions (i. e., the way in which British financial institutions identified financial services as candidates for elimination) was found to be largely informal and unsophisticated. Moreover service elimination was rated as the least important service range management activity and was allocated the least amount of resources (temporal, monetary and human). The findings also suggested that the content of the service elimination process was both similar and different to elimination practice in manufacturing settings. Among the most obvious similarities was the paramount importance of sales and profitability considerations in making products and financial services candidates for elimination. Among the most striking differences was that while a product is fully eliminated, partial elimination was the predominant outcome of the service elimination process in the studied setting. With regards to the contextual influence, it was found that the relative importance/frequency of the decision variables involved in the service elimination process varied in relation to the type and the size of individual financial institutions, the pursued overall business strategy, and degree of market orientation, the degree of formalisation of the service elimination process, the number of services in the range (service diversity), the type of financial service which is considered for elimination, the method of its delivery process, the intensity of competition and of the legislative environment and the volatility of the technological environment. As such, the findings confirmed the hypothesised dynamism of the service elimination decisions and suggested that any attempt to describe the service elimination process in a golden rule way that fits all companies, all financial services and all environmental circumstances would be misleading

Comparison of Cognitive Function after Carotid Artery Stenting versus Carotid Endarterectomy

The effect of carotid artery stenting (CAS) and carotid endarterectomy (CEA) on cognitive function is unclear. Both cognitive improvement and decline have been reported after CAS and CEA. We aimed to compare the changes in postprocedural cognitive function after CAS versus CEA. A systematic qualitative review of the literature was conducted according to the recommendations of the Preferred Reporting Items for Systematic Reviews and Meta-analysis statement for studies evaluating the changes in cognitive function after CAS compared with CEA. Thirteen studies (403 CEAs; 368 CAS procedures) comparing the changes in cognitive function after CEA versus CAS were identified. Most studies did not show significant differences in overall cognitive function or only showed a difference in a single cognitive test between the two procedures. A definitive conclusion regarding the effect of CAS versus CEA on cognitive function was not possible owing to heterogeneity in definition, method, timing of assessment, and type of cognitive tests. For the same reasons, performing a meta-analysis was not feasible. The lack of standardization of specific cognitive tests and timing of assessment of cognitive function after CAS and CEA do not allow for definite conclusions to be drawn. Larger, adequately-powered and appropriately designed studies are required to accurately evaluate the effect of CAS versus CEA on postprocedural cognitive function

Antecedents of employee intrapreneurship in the public sector:a proactive motivation approach

Public servants’ intrapreneurship (entrepreneurial actions performed by employees from within an organization) is gaining importance as a micro-foundation of public sector innovation and improved service delivery. This study addresses this topic from a proactive motivation perspective and using weekly diary surveys filled out by 757 public servants from 37 departments of the Dutch national public administration for five consecutive weeks (n = 2279 datapoints). Confirmatory factor analyses showed that antecedents of intrapreneurship could be grouped into three categories of proactive motivation: (1) reason-to (prosocial impact, job accountability), (2) can-do (job autonomy, self-efficacy, optimism), and (3) energized-to (work engagement). Multilevel structural equation modeling showed that public servants reported more intrapreneurial behavior when they had more reason-to and were energized-to be proactive. Can-do motivation moderated (strengthened) these relationships. Necessary conditions analyses showed that each predictor was essential, emphasizing the importance of careful alignment of human resource practices aimed at evoking different types of proactive motivation

On the role of boron on improving ductility in a new polycrystalline superalloy

AbstractThe role of boron in promoting ductility at high temperature in a prototype nickel-based superalloy designed for industrial gas turbines is studied. Both a boron-containing and boron-free variant are tested in tension at 750 °C, with further in-situ tests carried out using scanning electron microscopy (SEM), to clarify the mechanism of ductility improvement. The improvement in ductility is observed to be greater at the lowest investigated strain rate, where the grain boundary character plays a significant role on the mechanical properties; no ductility improvement was observed at the highest investigated strain rate. The in-situ tests were also performed at 750 °C and revealed directly the greater susceptibility of the grain boundary morphology in the boron-free case to fracture and – in the boron-containing case – the mechanism of ductility enhancement. The findings are supported further by high-resolution electron backscattered diffraction (HR-EBSD) strain mapping which confirms that the distribution of elastic strain and geometrically necessary dislocation (GND) content are influenced markedly by boron addition. The mechanism through which boron indirectly enhances the mechanical properties at elevated temperatures is discussed

Hartley transform and the use of the Whitened Hartley spectrum as a tool for phase spectral processing

The Hartley transform is a mathematical transformation which is closely related to the better known Fourier transform. The properties that differentiate the Hartley Transform from its Fourier counterpart are that the forward and the inverse transforms are identical and also that the Hartley transform of a real signal is a real function of frequency. The Whitened Hartley spectrum, which stems from the Hartley transform, is a bounded function that encapsulates the phase content of a signal. The Whitened Hartley spectrum, unlike the Fourier phase spectrum, is a function that does not suffer from discontinuities or wrapping ambiguities. An overview on how the Whitened Hartley spectrum encapsulates the phase content of a signal more efficiently compared with its Fourier counterpart as well as the reason that phase unwrapping is not necessary for the Whitened Hartley spectrum, are provided in this study. Moreover, in this study, the product–convolution relationship, the time-shift property and the power spectral density function of the Hartley transform are presented. Finally, a short-time analysis of the Whitened Hartley spectrum as well as the considerations related to the estimation of the phase spectral content of a signal via the Hartley transform, are elaborated

Increased Fluorodeoxyglucose Uptake Following Endovascular Abdominal Aortic Aneurysm Repair: A Predictor of Endoleak?

The main criterion for abdominal aortic aneurysm (AAA) repair is an AAA diameter ≥5.5 cm. However, some AAAs rupture when they are smaller. Size alone may therefore not be a sufficient criterion to determine rupture risk. Fluorodeoxyglucose (FDG) uptake is increased in the presence of inflammation and it was suggested that this may be a better predictor of rupture risk than AAA size. Furthermore, increased FDG uptake following endovascular AAA repair may be an indirect predictor of continuous AAA sac enlargement due to the presence of an endoleak (even if this is not detected by imaging modalities) and/or increased AAA rupture risk. The role of FDG uptake needs to be explored further in the management of AAAs

Crisis knowledge in tourism: types, flows and governance

Driven by the rapidly growing number of crises that affect tourism, the study of crisis knowledge management is gaining an increased interest in the tourism field. Effective management of crisis knowledge enhances the resilience of tourism organizations and destinations in crisis situations, strengthens their defense mechanisms, limits potential damages and allows them to bounce back to normalcy faster. This paper uses critical incident interviews with 21 tourism executives in order to identify the types of crisis knowledge they employ in the advent of a crisis and to explore the crisis knowledge management processes and flows within their organizations. Drawing from extant generic literature and the informants’ responses, the paper proposes a framework for the governance of crisis knowledge in tourism