Mental health-related conversations on social media and crisis episodes: a time-series regression analysis

We aimed to investigate whether daily fluctuations in mental health-relevant Twitter posts are associated with daily fluctuations in mental health crisis episodes. We conducted a primary and replicated time-series analysis of retrospectively collected data from Twitter and two London mental healthcare providers. Daily numbers of ‘crisis episodes’ were defined as incident inpatient, home treatment team and crisis house referrals between 2010 and 2014. Higher volumes of depression and schizophrenia tweets were associated with higher numbers of same-day crisis episodes for both sites. After adjusting for temporal trends, seven-day lagged analyses showed significant positive associations on day 1, changing to negative associations by day 4 and reverting to positive associations by day 7. There was a 15% increase in crisis episodes on days with above-median schizophrenia-related Twitter posts. A temporal association was thus found between Twitter-wide mental health-related social media content and crisis episodes in mental healthcare replicated across two services. Seven-day associations are consistent with both precipitating and longer-term risk associations. Sizes of effects were large enough to have potential local and national relevance and further research is needed to evaluate how services might better anticipate times of higher risk and identify the most vulnerable groups

Measuring internet activity: a (selective) review of methods and metrics

Two Decades after the birth of the World Wide Web, more than two billion people around the world are Internet users. The digital landscape is littered with hints that the affordances of digital communications are being leveraged to transform life in profound and important ways. The reach and influence of digitally mediated activity grow by the day and touch upon all aspects of life, from health, education, and commerce to religion and governance. This trend demands that we seek answers to the biggest questions about how digitally mediated communication changes society and the role of different policies in helping or hindering the beneficial aspects of these changes. Yet despite the profusion of data the digital age has brought upon us—we now have access to a flood of information about the movements, relationships, purchasing decisions, interests, and intimate thoughts of people around the world—the distance between the great questions of the digital age and our understanding of the impact of digital communications on society remains large. A number of ongoing policy questions have emerged that beg for better empirical data and analyses upon which to base wider and more insightful perspectives on the mechanics of social, economic, and political life online. This paper seeks to describe the conceptual and practical impediments to measuring and understanding digital activity and highlights a sample of the many efforts to fill the gap between our incomplete understanding of digital life and the formidable policy questions related to developing a vibrant and healthy Internet that serves the public interest and contributes to human wellbeing. Our primary focus is on efforts to measure Internet activity, as we believe obtaining robust, accurate data is a necessary and valuable first step that will lead us closer to answering the vitally important questions of the digital realm. Even this step is challenging: the Internet is difficult to measure and monitor, and there is no simple aggregate measure of Internet activity—no GDP, no HDI. In the following section we present a framework for assessing efforts to document digital activity. The next three sections offer a summary and description of many of the ongoing projects that document digital activity, with two final sections devoted to discussion and conclusions

Interdisciplinary research and the societal visibility of science: The advantages of spanning multiple and distant scientific fields

Acknowledgements The authors thank editor Ben Martin and three anonymous reviewers for their insightful comments and suggestions. The authors are also grateful to the valuable feedback received by Andrés Barge-Gil, Nicolas Carayol, Elena Cefis, Adrián A. Díaz-Faes, Jarno Hoekman, Cornelia Lawson, Óscar Llopis, Orietta Marsili, Francesco Rentocchini, Ammon Salter, and participants in the following workshops and conferences: CREI Ideas Development Workshop (Univ. of Bath, 2021), DRUID (2021), Academy of Management (2021), EU-SPRI (2021) and the Workshop on the Organisation, Economics, and Policy of Scientific Research (WOEPSR, 2022). The authors acknowledge funding from the Spanish Ministry of Economy, Industry and Competitiveness (CSO2013-48053-R); Nicolás Robinson-García is currently supported by a Ramón y Cajal grant from the Spanish Ministry of Science (RYC2019-027886-I). The usual disclaimers apply.Science policy discourse often encourages interdisciplinary research as an approach that enhances the potential of science to produce breakthrough discoveries and solutions to real-world, complex problems. While there is a large body of research examining the relationship between interdisciplinarity and scientific discovery, there is comparatively limited evidence on and understanding of the connection between interdisciplinarity and the generation of scientific findings that address societal problems. Drawing on a large-scale survey, we investigate whether scientists who conduct interdisciplinary research are more likely to generate scientific findings with high societal visibility - that is, research findings that attract the attention of non-academic audiences, as measured by mentions to scientific articles in blogs, news media and policy documents. Our findings provide support for the idea that two facets of interdisciplinarity - variety and disparity - are associated positively with societal visibility. Our results show, also, that the interplay between these two facets of interdisciplinarity has a systematic positive and significant association with societal visibility, suggesting a reinforcing effect of spanning multiple and distant scientific fields. Finally, we find support for the contingent role of scientists' collaboration with non-academic actors, suggesting that the positive association between interdisciplinary research and societal visibility is particularly strong among scientists who collaborate with actors outside academia. We argue that this study provides useful insights for science policy oriented to fostering the scientific and societal relevance of publicly funded research.Spanish Ministry of Economy, Industry and Competitiveness (CSO2013-48053-R)Ramón y Cajal grant from the Spanish Ministry of Science (RYC2019-027886-I

Marketing Applications of Social Tagging Networks

This dissertation focuses on marketing applications of social tagging networks. Social tagging is a new way to share and categorize content, allowing users to express their perceptions and feelings with respect to concepts such as brands and firms with their own keywords, “tags.” The associative information in social tagging networks provides marketers with a rich source of information reflecting consumers’ mental representations of a brand/firm/product. The first essay presents a methodology to create “social tag maps,” brand associative networks derived from social tags. The proposed approach reflects a significant improvement towards understanding brand associations compared to conventional techniques (e.g., brand concept maps and recent text mining techniques), and helps marketers to track real-time updates in a brand’s associative network and dynamically visualize the relative competitive position of their brand. The second essay investigates how information contained in social tags acts as proxy measures of brand assets that track and predict the financial valuation of firms using the data collected from a social bookmarking website, del.icio.us, for 61 firms across 16 industries. The results suggest that brand asset metrics based on social tags explain stock return. Specifically, an increase in social attention and connectedness to competitors is shown to be positively related to stock return for less prominent brands, while for prominent brands associative uniqueness and evaluation valence is found to be more significantly related to stock return. The findings suggest to marketing practitioners a new way to proactively improve brand assets for impacting a firm’s financial performance. The third essay investigates whether the position of products on social tagging networks can predict sales dynamics. We find that (1) books in long tail can increase sales by being strongly linked to well-known keywords with high degree centrality and (2) top sellers can be better sellers by creating dense content clusters rather than connecting them to well-known keywords with high degree centrality. Our findings suggest that marketing managers better understand a user community’s perception of products and potentially influence product sales by taking into account the positioning of their products within social tagging networks

Bank Networks from Text: Interrelations, Centrality and Determinants

In the wake of the still ongoing global financial crisis, bank interdependencies have come into focus in trying to assess linkages among banks and systemic risk. To date, such analysis has largely been based on numerical data. By contrast, this study attempts to gain further insight into bank interconnections by tapping into financial discourse. We present a text-to-network process, which has its basis in co-occurrences of bank names and can be analyzed quantitatively and visualized. To quantify bank importance, we propose an information centrality measure to rank and assess trends of bank centrality in discussion. For qualitative assessment of bank networks, we put forward a visual, interactive interface for better illustrating network structures. We illustrate the text-based approach on European Large and Complex Banking Groups (LCBGs) during the ongoing financial crisis by quantifying bank interrelations and centrality from discussion in 3M news articles, spanning 2007Q1 to 2014Q3.Comment: Quantitative Finance, forthcoming in 201

Divine attribution? The interaction of religious and secular beliefs on climate change attitudes

After five decades of research, there is still little consensus about the relation of religious variables to environmental attitudes. Even putting aside variations in sampling and measurement, we still have doubts about where modest consensus exists—the role of religious beliefs. Religious beliefs, such as mastery over nature, are more unstable than previously considered. Moreover, more importantly, these studies have generally failed to consider the role of secular beliefs about environmental problems and the interaction they may have with religion. Using data from a 2012 Public Religion Research Institute (PRRI) survey, we find religious variables have effects conditional on secular beliefs. Moreover, we draw upon an embedded experiment that shows instability in religious dominionism—the dominant religious effect in previous work. The results suggest previous reports of religious effects are not wrong, but overstated, and eliding secular beliefs is a serious sin of omission