Quantifying European Legislative Research: using CELEX and PreLex in EU legislative studies

Research on European legislative decision-making has entered a stage of quantitative analysis. The quantitative approach promises to advance the current dialogue by allowing for the evaluation of competing approaches across multiple policy domains and over time. At the same time, the quantitative study of EU decision-making introduces a number of drawbacks: it is difficult to identify one definitive source for legislative information, and case-level data are not directly accessible in a machine-readable format. In order to identify the most crucial pitfalls and provide a reliable data source, we evaluate the most frequently cited, publicly available EU legislative database, CELEX, and compare it with a less publicized legislative database referred to as PreLex. We find that CELEX documents legislative events, whereas PreLex records inter-institutional activities in the legislative process. Unsurprisingly, each of these databases has particular advantages, and we discuss which of the two might be better suited for the analysis of specific research questions

Crustal structure of the Peruvian continental margin from wide-angle seismic studies

Active seismic investigations along the Pacific margin off Peru were carried out using ocean bottom hydrophones and seismometers. The structure and the P-wave velocities of the obliquely subducting oceanic Nazca Plate and overriding South American Plate from 8°S to 15°S were determined by modelling the wide-angle seismic data combined with the analysis of reflection seismic data. Three detailed cross-sections of the subduction zone of the Peruvian margin and one strike-line across the Lima Basin are presented here. The oceanic crust of the Nazca Plate, with a thin pelagic sediment cover, ranging from 0–200 m, has an average thickness of 6.4 km. At 8°S it thins to 4 km in the area of Trujillo Trough, a graben-like structure. Across the margin, the plate boundary can be traced to 25 km depth. As inferred from the velocity models, a frontal prism exists adjacent to the trench axis and is associated with the steep lower slope. Terrigeneous sediments are proposed to be transported downslope due to gravitational forces and comprise the frontal prism, characterized by low seismic P-wave velocities. The lower slope material accretes against a backstop structure, which is defined by higher seismic P-wave velocities, 3.5–6.0 km s−1. The large variations in surface slope along one transect may reflect basal removal of upper plate material, thus steepening the slope surface. Subduction processes along the Peruvian margin are dominated by tectonic erosion indicated by the large margin taper, the shape and bending of the subducting slab, laterally varying slope angles and the material properties of the overriding continental plate. The erosional mechanisms, frontal and basal erosion, result in the steepening of the slope and consequent slope failure

Seismic structure of an oceanic core complex at the Mid-Atlantic Ridge, 22°19′N

We present results from a seismic refraction and wide-angle experiment surveying an oceanic core complex on the Mid-Atlantic Ridge at 22°19′N. Oceanic core complexes are settings where petrological sampling found exposed lower crustal and upper mantle rocks, exhumed by asymmetric crustal accretion involving detachment faulting at magmatically starved ridge sections. Tomographic inversion of our seismic data yielded lateral variations of P wave velocity within the upper 3 to 4 km of the lithosphere across the median valley. A joint modeling procedure of seismic P wave travel times and marine gravity field data was used to constrain crustal thickness variations and the structure of the uppermost mantle. A gradual increase of seismic velocities from the median valley to the east is connected to aging of the oceanic crust, while a rapid change of seismic velocities at the western ridge flank indicates profound differences in lithology between conjugated ridge flanks, caused by un-roofing lower crust rocks. Under the core complex crust is approximately 40% thinner than in the median valley and under the conjugated eastern flank. Clear PmP reflections turning under the western ridge flank suggest the creation of a Moho boundary and hence continuous magmatic accretion during core complex formation

The European Union's alternative models for maximizing its integration strategy for candidates and neighbouring states: a process of external differentiation

This paper investigates the patterns of integration between the European Union (EU) and the current candidates (Turkey and Serbia in the Western Balkans are used as case studies), and neighbourhood countries, specifically Ukraine. It inquires whether the priorities negotiated between the EU and current candidates and neighbourhood countries in terms of harmonizing and implementing EU legislation provide a form of differentiated integration. The aim is to uncover the EU’s integration strategies for its enlargement and neighbourhood policy. While the paper assesses the patterns of differentiated integration for Turkey, Serbia and Ukraine, it identifies a path of integration with the non-members of the EU, enabling the EU to expand its functional rules prior to or in lieu of accession, maximizing the EU’s integration capacity. The paper compares the differentiated integration pattern between the EU and Turkey on the one hand, and between the EU and Serbia (as an example from the Western Balkans) and Ukraine (as a European Neighbourhood country) on the other

Quantifying European Legislative Research : Using CELEX and PRELEX in EU Legislative Studies

International audienceResearch on European legislative decision-making has entered a stage of quantitative analysis. The quantitative approach promises to advance the current dialogue by allowing for the evaluation of competing approaches across multiple policy domains and over time. At the same time, the quantitative study of EU decision-making introduces a number of drawbacks: it is difficult to identify one definitive source for legislative information, and case-level data are not directly accessible in a machine-readable format. In order to identify the most crucial pitfalls and provide a reliable data source, we evaluate the most frequently cited, publicly available EU legislative database, CELEX, and compare it with a less publicized legislative database referred to as PreLex. We find that CELEX documents legislative events, whereas PreLex records inter-institutional activities in the legislative process. Unsurprisingly, each of these databases has particular advantages, and we discuss which of the two might be better suited for the analysis of specific research questions