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- Davidsson, Johan Bo, et al.
(författare)
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Defending the organisation, not the members: Unions and the reform of job security legislation in Western Europe
- 2013
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Ingår i: European Journal of Political Research. - : Wiley. - 0304-4130. ; 52:3, s. 339-363
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Tidskriftsartikel (refereegranskat)abstract
- European labour markets are often described as rigid with comparatively high levels of job protection that do not allow for the flexible adjustment of employment to economic fluctuations. This interpretation overlooks important sources of flexibility, however. Research has shown that recent labour market policy reforms have allowed for the creation of two-tier labour markets consisting of insiders in standard employment relationships and outsiders in non-standard employment. This outcome has typically been explained by pointing to the representational interests of unions or social-democratic parties. It has been argued that rather than protecting all labour market participants, unions and social-democratic parties focus on the interests of their members and their core constituency, respectively, most of whom are in standard employment relationships. In contrast, it is argued here that unions' institutional power resources are the crucial variable explaining this outcome. In difficult economic times, when unions are asked to make concessions, they will assent to labour market reforms, but only to those that do not fundamentally threaten to undermine their organisational interests. In the context of job security legislation, this means that unions defend the protection of permanent contracts while they compromise on the regulation of temporary employment. This ‘second best solution’ allows them to protect their organisational interests, both by retaining their institutional role in the administration of dismissals and by living up to their institutional role as one of the organisations responsible for the direction of labour market policy reform. Using fsQCA this article shows that unions' institutional power resources are more apt to explain the observed two-tier reform pattern than the unions' or the social-democratic parties' representational interests.
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- Emmenegger, Tim M., et al.
(författare)
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The Influence of Radio-Frequency Transmit Field Inhomogeneities on the Accuracy of G-ratio Weighted Imaging
- 2021
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Ingår i: Frontiers in Neuroscience. - : Frontiers Media SA. - 1662-4548 .- 1662-453X. ; 15
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Tidskriftsartikel (refereegranskat)abstract
- G-ratio weighted imaging is a non-invasive, in-vivo MRI-based technique that aims at estimating an aggregated measure of relative myelination of axons across the entire brain white matter. The MR g-ratio and its constituents (axonal and myelin volume fraction) are more specific to the tissue microstructure than conventional MRI metrics targeting either the myelin or axonal compartment. To calculate the MR g-ratio, an MRI-based myelin-mapping technique is combined with an axon-sensitive MR technique (such as diffusion MRI). Correction for radio-frequency transmit (B1+) field inhomogeneities is crucial for myelin mapping techniques such as magnetization transfer saturation. Here we assessed the effect of B1+ correction on g-ratio weighted imaging. To this end, the B1+ field was measured and the B1+ corrected MR g-ratio was used as the reference in a Bland-Altman analysis. We found a substantial bias (≈-89%) and error (≈37%) relative to the dynamic range of g-ratio values in the white matter if the B1+ correction was not applied. Moreover, we tested the efficiency of a data-driven B1+ correction approach that was applied retrospectively without additional reference measurements. We found that it reduced the bias and error in the MR g-ratio by a factor of three. The data-driven correction is readily available in the open-source hMRI toolbox (www.hmri.info) which is embedded in the statistical parameter mapping (SPM) framework.
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