The development of delinquency during adolescence: a comparison of missing data techniques

Conclusions on the development of delinquent behaviour during the life-course can only be made with longitudinal data, which is regularly gained by repeated interviews of the same respondents. Missing data are a problem for the analysis of delinquent behaviour during the life-course shown with data from an adolescents’ four-wave panel. In this article two alternative techniques to cope with missing data are used: full information maximum likelihood estimation and multiple imputation. Both methods allow one to consider all available data (including adolescents with missing information on some variables) in order to estimate the development of delinquency. We demonstrate that self-reported delinquency is systematically underestimated with listwise deletion (LD) of missing data. Further, LD results in false conclusions on gender and school specific differences of the age–crime relationship. In the final discussion some hints are given for further methods to deal with bias in panel data affected by the missing process.     

Qualitätserwartungen und ethischer Anspruch bei der Lektüre von Blogs und von Tageszeitungen

Besides classical journalistic products, media users increasingly tend to read texts on the internet published by other users, as in weblogs. How do users navigate among these offers, how do they evaluate the quality, and which standards in terms of media ethics do they apply when reading weblogs compared to newspaper articles? Two empirical studies address these questions. In a survey, 702 internet users rated their theoretical expectations in terms of journalistic quality and compliance with ethical standards, comparing weblogs and daily newspapers. In a consecutive 2 × 2 experimental design, 120 participants read a journalistic text with varying source information (weblog/daily newspaper) and varying degree of adherence to ethical standards (ethically questionable/neutral). Participants then rated the quality of the text and its ethical standards. Results indicate that daily newspapers more than blogs are expected to deliver journalistic quality. But when read, texts are evaluated according to their content rather than their source. Ethically questionable texts in newspapers are disapproved as much as ethically questionable blog postings.     

Going Public — Effekte der Börsen-notierung auf das Marketing

Zusammenfassung  Wenn sich Marketingexperten in der Vergangenheit an der Schnittstelle zwischen Marketing und Finance bewegten, standen h?ufig die Effekte bestimmter Marketingmassnahmen auf den B?rsenkurs im Mittelpunkt. Wie sich jedoch die B?rsennotierung und damit eine stringente Orientierung am Shareholder Value auf das Marketingmanagement auswirkt, wurde bislang kaum untersucht. Eine explorative Studie erforscht die wesentlichen Auswirkungen der zunehmenden Shareholder Value-Orientierung auf die spezifischen Bedingungen des Marketings. M.A. Lydia Ebersbach Wissenschaftliche Mitarbeiterin im Kompetenzzentrum „Marketing Performance Management“ am Institut für Marketing und Handel an der Universit?t St. Gallen Prof. Dr. Sven Reinecke Dozent für Betriebswirtschaftslehre an der Universit?t St. Gallen und Leiter des Kompetenzzentrums „Marketing Performance Management“ am dortigen Institut für Marketing und Handel.     

The development of delinquency during adolescence: a comparison of missing data techniques revisited

Quality & Quantity - Conclusions about the individual development of delinquent behaviours during the life-course are often made by repeatedly interviewing the same respondents (i.e. panel...     

Multiple imputation of incomplete zero‐inflated count data

Empirical count data are often zero‐inflated and overdispersed. Currently, there is no software package that allows adequate imputation of these data. We present multiple‐imputation routines for these kinds of count data based on a Bayesian regression approach or alternatively based on a bootstrap approach that work as add‐ons for the popular multiple imputation by chained equations (mice ) software in R (van Buuren and Groothuis‐Oudshoorn , Journal of Statistical Software, vol. 45, 2011, p. 1). We demonstrate in a Monte Carlo simulation that our procedures are superior to currently available count data procedures. It is emphasized that thorough modeling is essential to obtain plausible imputations and that model mis‐specifications can bias parameter estimates and standard errors quite noticeably. Finally, the strengths and limitations of our procedures are discussed, and fruitful avenues for future theory and software development are outlined.     

Marktkommunikation — Wie Paul Watzlawick sie sehen würde

Zusammenfassungen  Der kürzlich verstorbene Kommunikationswissenschaftler und Soziologe Paul Watzlawick wurde berühmt für seine Kommunikationstheorie, die fünf sogenannten „pragmatischen“ Axiome. Wie würde der radikale Konstruktivist die Realit?t der heutigen Marktkommunikation beurteilen? Welche Erkenntnisse k?nnten Marketingforschung und-praxis aus einer Rückbesinnung auf seine Kommunikationstheorie gewinnen? Prof. Dr. Sven Reinecke Dozent für Betriebswirtschaftslehre an der Universit?t St. Gallen (HSG) und Leiter des Kompetenzzentrums „Marketing Performance Management“ am dortigen Institut für Marketing und Handel. Mitherausgeber der Marketing Review St. Gallen