1,394 research outputs found

    Perseverance of perverse subsidies and their impact on trade and the environment

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    Theoretical and empirical aspects of policy failures due to subsidies are discussed in the context of international trade. A general classification of subsidies that cause environmental externalities is presented. The economic and environmental impacts of producer subsidies on international trade are examined with partial equilibrium analysis. The magnitude and economic and environmental relevance of subsidies in various sectors is assessed on the basis of empirical indicators. Finally, suggestions are provided on how subsidy-related policy failures can be eliminated at national and international levels. © 2001 Elsevier Science B.V

    ERP in Semi-Process: Requirements Capture for Tracking and Tracing

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    Spatially valid proprioceptive cues improve the detection of a visual stimulus

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    Vision and proprioception are the main sensory modalities that convey hand location and direction of movement. Fusion of these sensory signals into a single robust percept is now well documented. However, it is not known whether these modalities also interact in the spatial allocation of attention, which has been demonstrated for other modality pairings. The aim of this study was to test whether proprioceptive signals can spatially cue a visual target to improve its detection. Participants were instructed to use a planar manipulandum in a forward reaching action and determine during this movement whether a near-threshold visual target appeared at either of two lateral positions. The target presentation was followed by a masking stimulus, which made its possible location unambiguous, but not its presence. Proprioceptive cues were given by applying a brief lateral force to the participant’s arm, either in the same direction (validly cued) or in the opposite direction (invalidly cued) to the on-screen location of the mask. The dâ€Č detection rate of the target increased when the direction of proprioceptive stimulus was compatible with the location of the visual target compared to when it was incompatible. These results suggest that proprioception influences the allocation of attention in visual spac
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