Th e purpose of the study was to evaluate the eff icacy and feasibility of using website in biology education. We have explored the World Wide Web as a possible tool for education about health and nutrition. Th e websites were teaching tools for primary school students. Control groups used the traditional educational materials as books or worksheets, and the experimental groups used prepared we...

Over the last years, public smoking bans have been introduced in most European countries. Unlike elsewhere, in Germany such bans were introduced at state level at diff erent points in time, which provides important intra-country regional variation that can be exploited to identify the eff ects of such bans on the hospitality industry. Using monthly data from a compulsory survey carried out by t...

Recognition that social, economic, political, and environmental factors directly aff ect HIV risk and vulnerability has stimulated interest in structural approaches to HIV prevention. Progress in the use of structural approaches has been limited for several reasons: absence of a clear defi nition; lack of operational guidance; and limited data on the eff ectiveness of structural approaches to t...

Aqua treadmill is mainly used for rehabilitation purposes, but research indicates that this equipment could be used for training as well. Th e few studies performed with aqua treadmill mainly followed lactate and heart rate changes. Th erefore, the aim of this study was to test the eff ect of high water treadmill training on several blood parameters and on the correlations between them. Eight s...

Th e aim of the present trial was to study the eff ect of two diff erent dietary phosphorus (P) levels on the laying performance in long-term (17 months) egg production and egg shell quality in terms of strength and thickness from the 7th to 17th month of laying. In case of eggshell quality parameters the time eff ect as well as the interaction between dietary P levels and time were also examin...

Over the last years, public smoking bans have been introduced in most European countries. Unlike elsewhere, in Germany such bans were introduced at state level at diff erent points in time, which provides important intra-country regional variation that can be exploited to identify the eff ects of such bans on the hospitality industry. Using monthly data from a compulsory survey carried out by t...

This paper evaluates the eff ectiveness of the introduction of a Writing Center at a university. The center has the purpose to provide subject-specifi c courses that aim to improve students‘ abilities of scientifi c writing. In order to deal with presumed selfperceptional biases of students in feedback surveys, we use diff erent quantitative evaluation methods and compare the results to corresp...

Using household travel diary data collected in Germany between 1997 and 2012, we employ an instrumental variable (IV) approach to estimate fuel price and effi ciency elasticities. The aim is to gauge the relative impacts of fuel economy standards and fuel taxes on distance traveled. We fi nd that the magnitudes of the elasticity estimates are statistically indistinguishable: higher fuel prices ...

This paper estimates the employment eff ects of industry-specifi c, collectively-bargained minimum wages in Germany for two occupations associated with the construction sector. I propose a truly exogenous control group in contrast to the control group design used in the literature. Further, a diff erence-in-diff erences-in-diff erences estimator is presented as a robustness test for occupation-...

We exploit regional variation in the availability of breast cancer screening policies and variations in age eligibility criteria across European regions to estimate the causal eff ect of home invitation on mammography uptake. We link administrative public data about regional breast cancer screening policies from various sources to individual Survey of Health Ageing and Retirement in Europe (SHA...