The hillslope length impact on SWAT streamflow prediction in large basins

The objective of this study was to assess the impact of hillslope length on Soil and Water Assessment Tool (SWAT) streamflow predictions in large basins using three methods for hillslope length calculation (the SWAT method, L1; a 3D analysis method, L2; a constant value, L3) combined with two DEMs (pixel size of 25 and 100 m), for a total of six DEML configurations that were tested in the Upper Danube (132000 km(2)). The delineation of subbasins and HRUs were kept unchanged in all configurations, thus isolating the DEM impact on streamflow from that of subbasins delineation. The configurations were independently calibrated in 98 gauged stations located in headwater subbasins (period 1995 similar to 2006), and validated in 150 gauged stations (period 1995 similar to 2009). The analysis of streamflow prediction was extended to its components (surface runoff, lateral flow and baseflow) using performance criteria and residual analysis, and the comparison of different components of water yield was pursued. Calibration and validation showed that all configurations simulated monthly streamflow acceptably (PBIAS < 25% for more than 70% of 150 gauged stations). DEM pixel size had negligible effect of streamflow and its components. The default hillslope length (L1) resulted in large overestimations of lateral flow. L2 resulted in the best performance as well as L3 method. Given that L2 method takes into account the topographic convergence of flow, the configuration of DEM100 and L2 is recommended for SWAT application in large basins in order to obtain reliable streamflow predictions

Spin dynamics of a solid-state qubit in proximity to a superconductor

A broad effort is underway to understand and harness the interaction between superconductors and spin-active color centers with an eye on the realization of hybrid quantum devices and novel imaging modalities of superconducting materials. Most work, however, overlooks the complex interplay between either system and the environment created by the color center host. Here we use an all-diamond scanning probe to investigate the spin dynamics of a single nitrogen-vacancy (NV) center proximal to a high-critical-temperature superconducting film in the presence of a weak magnetic field. We find that the presence of the superconductor increases the NV spin coherence lifetime, a phenomenon we tentatively rationalize as a change in the electric noise due to a superconductor-induced redistribution of charge carriers near the NV site. We build on these findings to demonstrate transverse-relaxation-time-weighted imaging of the superconductor film. These results shed light on the complex surface dynamics governing the spin coherence of shallow NVs while simultaneously paving the route to new forms of noise spectroscopy and imaging of superconductors

Occupational Regulation in the European Union: Coverage and Wage Effects

We present the first EU-wide study on the prevalence and labour market impactof occupational regulation in the European Union. Drawing on a new EU Surveyof Regulated Occupations, we find that licensing affects about 22 per cent ofworkers in the European Union, although there is significant variability acrossmember states and occupations. On average, licensing is associated with a 4per cent higher hourly wage. Using decomposition techniques we show that rentcapture accounts for one-third of this effect and the remainder is attributed tosignalling. We find considerable heterogeneity in the wage gains by occupationand level of educational attainment. Finally, occupational licensing increaseswage inequality. After accounting for composition effects, licensing increases thestandard deviation of wages by about 0.02 log point

Competition and pass-through: evidence from isolated markets

We measure how pass-through varies with competition in isolated oligopolistic markets with captive consumers. Using daily pricing data from gas stations on small Greek islands, we study how unanticipated and exogenous changes in excise duties (which vary across different petroleum products) are passed through to consumers in markets with different numbers of retailers. We find that pass-through increases from 0.4 in monopoly markets to 1 in markets with four or more competitors and remains constant thereafter. Moreover, the speed of price adjustment is about 60% higher in more competitive markets. Finally, we show that geographic market definitions based on arbitrary measures of distance across sellers, often used by researchers and competition authorities, result in significant overestimation of the pass-through when the number of competitors is small.The authors gratefully acknowledge financial support from Cambridge judge Business School's Small Grants Scheme. Part of this research was conducted while Genakos was visiting Toulouse School of Economics. Financial support received from the European Research Council (ERC) under the European Community’s Seventh Framework Programme (FP7/2007-2013) – Grant agreement 340903 is gratefully acknowledged