This essay sketches technical and non-technical issues around persistent identifiers (henceforth PIs) in a manner which makes no attempt to be complete. Our goal is to rescue the core notions from the obscurity which detail and completeness burdens them with. A reader willing to entertain the...

DataCite is an international consortium which aims to increase acceptance of research data as legitimate, citable contributions to scholarly communication. To enable this DataCite assigns persistent identifiers for research datasets and manages the infrastructures that support simple and...

Nowadays more than half of all Germans (52.6%) inform themselves about health topics online. It is expected that in 2011 every third mobile phone sold will be a smartphone. At the moment there are more than 300,000 applications available since the introduction of the Apple online store in July 2008;...

Mehr als die Hälfte aller Bundesbürger (52,6 %) informiert sich inzwischen online über Gesundheitsthemen. 2011 wird voraussichtlich jedes dritte verkaufte Mobiltelefon ein Smartphone sein. Seit der Einführung des Online-Stores von Apple im Juli 2008 stehen mehr als 300.000 Anwendungen...

Dieses Diskussionspapier beschäftigt sich mit bestehenden Ansätzen, "Good Governance" auf lokaler Ebene zu konzeptualisieren und zu operationalisieren. Es möchte damit einen Beitrag zur Diskussion um die Anwendbarkeit und den praktischen Wert von derlei Ansätzen leisten. Sein Ziel ist es...

Using Google search activity data can help detect, in real time and at high frequency, a wide spectrum of breaking socio-economic trends around the world. This wealth of data is the result of an ongoing and ever more pervasive digitization of information. Search activity data stand in contrast...

I analyze the impact of online ads on the advertiser's competitors, using data from randomized field experiments on a restaurant-search website. I find significant positive causal effects of ads on the chances of sales for non-advertised restaurants. The spillover benefits are concentrated on...