The CARMENES search for exoplanets around M dwarfs - Photospheric parameters of target stars from high-resolution spectroscopy

The new CARMENES instrument comprises two high-resolution and high-stability spectrographs that are used to search for habitable planets around M dwarfs in the visible and near-infrared regime via the Doppler technique. Characterising our target sample is important for constraining the physical properties of any planetary systems that are detected. The aim of this paper is to determine the fundamental stellar parameters of the CARMENES M-dwarf target sample from high-resolution spectra observed with CARMENES. We also include several M-dwarf spectra observed with other high-resolution spectrographs, that is CAFE, FEROS, and HRS, for completeness. We used a {chi}^2 method to derive the stellar parameters effective temperature T_eff, surface gravity log g, and metallicity [Fe/H] of the target stars by fitting the most recent version of the PHOENIX-ACES models to high-resolution spectroscopic data. These stellar atmosphere models incorporate a new equation of state to describe spectral features of low-temperature stellar atmospheres. Since T_eff, log g, and [Fe/H] show degeneracies, the surface gravity is determined independently using stellar evolutionary models. We derive the stellar parameters for a total of 300 stars. The fits achieve very good agreement between the PHOENIX models and observed spectra. We estimate that our method provides parameters with uncertainties of {sigma} T_eff = 51 K, {sigma} log g = 0.07, and {sigma} [Fe/H] = 0.16, and show that atmosphere models for low-mass stars have significantly improved in the last years. Our work also provides an independent test of the new PHOENIX-ACES models, and a comparison for other methods using low-resolution spectra. In particular, our effective temperatures agree well with literature values, while metallicities determined with our method exhibit a larger spread when compared to literature results

The equilibrium and spillover effects of early retirement

This paper examines the labor market effects of unemployment insurance extensions. It uses administrative Social Security matched employer-employee data from Austria. Critical components of the analysis are effects on wages as well as retirement/job separation effects. The paper found that: - Older workers are very responsive to unemployment insurance benefit extensions, which in our setting may have served as a bridge into early retirement. - These separations stem from high-value employment relationships, and may constitute inefficient separations. - Wages appear unresponsive to such shifts on workers’ nonemployment outside options, implying that these workers may not be able to use such reforms to improve their bargaining power - even if they are older and on the retirement margin. - However, in a second study, we find no effects on separations of such policies even for older workers. The key difference is that one reform was potential benefit extensions (entailing early retirement) rather than the benefit levels (in increases in the generosity of which even older workers did not separate from their jobs). The policy implications of the findings are: - Unemployment insurance benefit generosity may interact with retirement policies and trigger early retirement among older workers eligible for these benefits. - These separations may be socially inefficient and may therefore have welfare costs. Subsidizing early retirement policies does not entail wage pressure

Segmenting the Business Traveler based on Emotions, Satisfaction, and Behavioral Intention

As travel is part of their work, business travelers are assumed to be focused on carrying out a work related task, rather than feeling emotionally stimulated during their trip. Due to this belief, there is limited research on consumer emotions within this segment of the travel market. However, not only is business travel an experience and therefore it involves emotions, but many business trips have a strong leisure component and business travel decision-making is often emotionally charged. This paper segments the business travel market based on emotions, satisfaction and behavioral intention. Using a sample of 400 managers in small-medium-size companies, the study demonstrates that the relationship between emotions and satisfaction is not uni-directional as far as business tourism is concerned. For two of the four segments, the valence of emotions translated into an opposite level of satisfaction/intention. The segments were found to differ in personal and trip-related variables

A Congestion Theory of Unemployment Fluctuations

We propose a theory of unemployment fluctuations in which new hires and incumbent workers are imperfect substitutes. Hence, attempts to hire away the unemployed during recessions diminish the marginal product of new hires, discouraging job creation. This single feature achieves a tenfold increase in the volatility of hiring in an otherwise standard search model, produces a realistic Beveridge curve despite countercyclical separations, and explains 30–40 percent of US unemployment fluctuations. Additionally, it explains the excess procyclicality of new hires’ wages, the cyclical labor wedge, countercyclical earnings losses from job displacement, and the limited steady-state effects of unemployment insurance. (JEL E24, E32, J22, J23, J31, J63

The Intentional Use of Service Recovery Strategies to Influence Consumer Emotion, Cognition and Behaviour

Service recovery strategies have been identified as a critical factor in the success of. service organizations. This study develops a conceptual frame work to investigate how specific service recovery strategies influence the emotional, cognitive and negative behavioural responses of . consumers., as well as how emotion and cognition influence negative behavior. Understanding the impact of specific service recovery strategies will allow service providers' to more deliberately and intentionally engage in strategies that result in positive organizational outcomes. This study was conducted using a 2 x 2 between-subjects quasi-experimental design. The results suggest that service recovery has a significant impact on emotion, cognition and negative behavior. Similarly, satisfaction, negative emotion and positive emotion all influence negative behavior but distributive justice has no effect

Local 3Qy betatron resonance correction in the 2012 RHIC 250 GeV run

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Real and Modeled Effect of Booster Extraction Equipment on Dispersion

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The “Dark Side” of General Health and Fitness-Related Self-Service Technologies: A Systematic Review of the Literature and Directions for Future Research

While general health and fitness-related self-service technologies, such as health and fitness apps and wearable activity trackers, are steadily increasing in popularity, there are now increasing reports of the potential harm they can cause to consumer well-being. An overview and analysis of the “dark side” of general health and fitness-related self-service technologies is therefore timely and appropriate. In the present work, the authors systematically identify and review the existing literature on this topic across various disciplinary backgrounds. They summarize available knowledge concerning the potential adverse consequences for consumer well-being resulting from the use of health and fitness apps and wearable devices and propose a conceptual framework to explain the relationship between using such technologies and these negative outcomes. Based on these insights, the authors identify current research gaps concerning the dark side of general health and fitness-related self-service technologies and propose corresponding directions for future research. They also discuss the implications of these findings for marketers and public policy makers