5,715 research outputs found

    On the resolution of extremal and constant scalar curvature Kaehler orbifolds

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    In this paper we give sufficient conditions on a compact orbifold with an extremal Kaehler metric to admit a resolution with an extremal Kaehler metric. We also complete the Kaehler constant scalar curvature case.Comment: This paper, together with the next one by the same authors, contains more general results than arxiv.org/abs/1402.5919 (by the same authors), which will then be withdraw

    Remote Tracking via Encoded Information for Nonlinear Systems

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    The problem addressed in this paper is to control a plant so as to have its output tracking (a family of) reference commands generated at a remote location and transmitted through a communication channel of finite capacity. The uncertainty due to the presence of the communication channel is counteracted by a suitable choice of the parameters of the regulator

    Does Union Membership Really Reduce Job Satisfaction?

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    We investigate the effect of union membership on job satisfaction. Whilst it is common to study the effects of union status on satisfaction treating individual membership as given, in this paper, we account for the endogenous selection induced by the sorting of workers into unionised jobs. Using linked employer-employee data from the 1998 British Workplace Employee Relations Survey, we address the question of how the membership decision is related to overall job satisfaction and to satisfaction with pay. Once the endogeneity of membership is accounted for, the marked difference in job satisfaction between unionised and non-unionised workers characterising raw data disappears, indicating that a selection effect, rather than a causal effect, explains the relationship.Job satisfaction, Trade unions, Linked employer-employee data

    Why so Unhappy? The Effects of Unionisation on Job Satisfaction

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    We use linked employer-employee data to investigate the job satisfaction effect of unionisation in Britain. We depart from previous studies by developing a model that simultaneously controls for the endogeneity of union membership and union recognition. We show that a negative association between membership and satisfaction only emerges where there is a union recognised for bargaining, and that such an effect vanishes when the simultaneous selection into membership and recognition is taken into account. We also show that ignoring endogenous recognition would lead to conclude that membership has a positive effect on satisfaction. Our estimates indicate that the unobserved factors that lead to sorting across workplaces are negatively related to the ones determining membership and positively related with those generating satisfaction, a result that we interpret as being consistent with the existence of queues for union jobs.job satisfaction, union membership, union recognition, endogeneity

    Do Job Security Guarantees Work?

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    We investigate the effect of employer job security guarantees on employee perceptions of jobsecurity. Using linked employer-employee data from the 1998 British Workplace EmployeeRelations Survey, we find job security guarantees reduce employee perceptions of jobinsecurity. This finding is robust to endogenous selection of job security guarantees byemployers engaging in organisational change and workforce reductions. Furthermore, thereis no evidence that increased job security through job guarantees results in greater workintensification, stress, or lower job satisfaction.Job insecurity, job guarantees, linked employer-employee data