University of Mannheim

About: University of Mannheim is a education organization based out in Mannheim, Germany. It is known for research contribution in the topics: Context (language use) & Politics. The organization has 4448 authors who have published 12918 publications receiving 446557 citations. The organization is also known as: Uni Mannheim & UMA.

Why do people participate in Web surveys? Applying survey participation theory to Internet survey data collection

Abstract: In recent years Web surveys have emerged as the most popular mode of primary data collection in market and social research. To improve our understanding about the influence of different societal-level factors, characteristics of the sample person, and attributes of the survey design on participation in Web surveys, this paper establishes a systematic link between theoretical frameworks used to explain survey participation behavior and state-of-the-art empirical research on online data collection methods. The concepts of self-perception, cognitive dissonance, commitment and involvement, social exchange, compliance, leverage-salience, and planned behavior are discussed and their relationship with factors that have empirically proven to influence Web survey participation are analyzed using data from an expert survey. This paper will help researchers and practitioners to make informed decisions about the use of techniques increasing participation in Web surveys.

The Social Connectedness of Older Europeans: Patterns, dynamics and contexts

Abstract: Special issue on Challenges and opportunities of ageing in Europe: Findings from the first two waves of the Survey of Health, Ageing and Retirement in Europe, edited by A. BORSCH-SUPAN, Karsten HANK and H. JURGES

Risk as a Primitive: A Survey of Measures of Perceived Risk

Abstract: The concept of risk is essential to many problems in economics and business. Usually, risk is treated in the traditional expected utility framework where it is defined only indirectly through the shape of the utility function. The purpose of utility functions, however, is to model preferences. In this paper, we review those approaches which directly model risk judgements. After a short review of naive risk measures used in earlier economic literature, we present recent theoretical and empirical developments.

The effect of a taurine-containing drink on performance in 10 endurance-athletes.

Abstract: To determine the effect of a taurine-enriched drink “Red Bull” on performance, 10 endurance-athletes performed three trials. After 60 min. cycling at approximately 70% VO2 max, the subjects pedalled to exhaustion on a cycle ergometer. During each exercise, the subjects received 500 ml of a test-drink after 30 min. submaximal cycling: “Red Bull” without taurine, without glucuronolacton (U1), “Red Bull” without taurine, without glucuronolacton, without caffeine (U2) and “Red Bull” original drink containing taurine, glucuronolacton and caffeine (U3). The heart rate level was significantly lower in U3 (p = 0,0031) 15 min. after application. The plasma catecholamines increased slightly from begin of exercise to 15 min. after application of the drinks in all trials but remained on a significantly lower level in U3 (epinephrine (p = 0,0011) and norepinephrine (p = 0,0003). Endurance time was significantly longer with “Red Bull” original in U3 (p = 0,015). The results of this study show a positive effect of a taurine-containing drink on hormonal responses which leads to a higher performance.