Zoekresultaten

The role of time, weather and Google Trends in understanding and predicting web survey response

In the literature about web survey methodology, significant eorts have been made to understand the role of time-invariant factors (e.g. gender, education and marital status) in (non-)response mechanisms. Time-invariant factors alone, however, cannot account for most variations in (non-)responses, especially fluctuations of response rates over time. This observation inspires us to investigate the counterpart of time-invariant factors, namely time-varying factors and the potential role they play in web survey (non-)response. Specifically, we study the effects of time, weather and societal trends (derived from Google Trends data) on the daily (non-)response patterns of the 2016 and 2017 Dutch Health Surveys. Using discrete-time survival analysis, we find, among others, that weekends, holidays, pleasant weather, disease outbreaks and terrorism salience are associated with fewer responses. Furthermore, we show that using these variables alone achieves satisfactory prediction accuracy of both daily and cumulative response rates when the trained model is applied to future unseen data. This approach has the further benefit of requiring only non-personal contextual information and thus involving no privacy issues. We discuss the implications of the study for survey research and data collection.

Cultural tourism trends

Triangulating Amsterdam’s illicit stimulant use trends by wastewater analysis and recreational drug use monitoring

Drug consumption estimates are of relevance because of public health effects as well as associated criminal activities. Wastewater analysis of drug residues enables the estimation of drug consumption and drug markets. Short-term and long-term trends of cocaine, MDMA (ecstasy), amphetamine (speed) and methamphetamine (crystal meth), were studied for the city of Amsterdam. MDMA (+41%) and cocaine (+26%) showed significantly higher weekend vs. week consumption, while no differences were observed for the other drugs. The consumption of MDMA, cocaine, amphetamine and methamphetamine significantly increased between 2011 and 2019. Weekly trends emerging from wastewater analyses were supported by qualitative and quantitative data from a recreational drug use monitoring scheme. However, information collected in panel interviews within nightlife networks and surveys among visitors of pubs, clubs and festivals only partially reflected the long term increase in consumption as registered from wastewater analysis. Furthermore, methamphetamine use was not well presented in survey data, panel studies and test service samples, but could be monitored trough wastewater analysis. This illustrates that wastewater analysis can function as an early warning if use and user groups are small or difficult to reach trough other forms of research. All in all, this study illustrates that wastewater-based epidemiology is complementary to research among user groups, and vice versa. These different types of information enable to connect observed trends in total drug consumption to behaviour of users and the social context in which the use takes place as well as validate qualitative signals about (increased) consumption of psychoactive substances. Such a multi angular approach to map the illicit drug situation on local or regional scale can provide valuable information for public health.

Knowledge Management: An Overview Of Research Trends

As a young and interdisciplinary field, Knowledge Management (KM) holds a crucial role in scientific research and development of knowledge-intensive economies. This study elaborates on the methods used in previous studies regarding the research trends of KM and their contribution to the discipline by examining the KM literature. The purpose of the study is to determine the current research trends of KM by analysing KM citation classics and examining their characteristics as well as presenting a holistic framework of KM publications from the results of citation analysis. A total of 152 articles published in peer review journals between the years 2010-2014 were analysed. As a result of the analysis, a holistic KM framework was developed in order to contribute to a consensus of KM field. The results of the study reveals that the coverage of KM articles expanded into a broad spectrum of concepts, disciplines and environment.

Media representations of naturalized athletes

Turkey has received consistent criticism from international media for having many naturalized athletes in its national squad, both in the Olympic Games and other major international sporting events. Similar criticisms have also been a feature of debates for a long time in domestic media, varying in views toward these athletes. This research focuses on media representations of naturalized athletes in Turkey between 2008 and 2020. We investigated the sentiments of news items from four major Turkish newspapers (Milliyet, Cumhuriyet, Sabah and Fanatik) on their stances toward naturalized athletes over the timespan of 2008–2020. Beside analyzing the sentiment of the media content both cumulatively and fragmentedly, we also identified the yearly trends and most featured sports in this context, combining qualitative and quantitative techniques. Our findings showed that sentiments in Turkish media toward naturalized athletes are mostly neutral and negative as well as with differences varying on the basis of the newspapers and news item types. The most criticism underlined pursuing “shortcut” success with naturalized athletes representing Turkey in the international arena. Among the featured sports, basketball, football, and track and field have been the most discussed ones in the naturalization context.