145 citations · 615 across the 20 of their papers we have counts for
22 papers
Are Large Language Models a Threat to Digital Public Goods? Evidence from Activity on Stack Overflow
Maria del Rio-Chanona, Nadzeya Laurentsyeva, Johannes Wachs
Large language models like ChatGPT efficiently provide users with information about various topics, presenting a potential substitute for searching the web and asking people for he…
Understanding (Ir)rational Herding Online
Henry K. Dambanemuya, Johannes Wachs, Emőke-Ágnes Horvát
Investigations of social influence in collective decision-making have become possible due to recent technologies and platforms that record interactions in far larger groups than co…
Specialization in Criminal Careers
Georg Heiler, Tuan Pham, Jan Korbel +2
We use a comprehensive longitudinal dataset on criminal acts over five years in a European country to study specialization in criminal careers. We cluster crime categories by their…
Modeling Interconnected Social and Technical Risks in Open Source Software Ecosystems
William Schueller, Johannes Wachs
Open source software ecosystems consist of thousands of interdependent libraries, which users can combine to great effect. Recent work has pointed out two kinds of risks in these s…
Evolving Collaboration, Dependencies, and Use in the Rust Open Source Software Ecosystem
William Schueller, Johannes Wachs, Vito D. P. Servedio +2
Open-source software (OSS) is widely spread in industry, research, and government. OSS represents an effective development model because it harnesses the decentralized efforts of m…
Making Markets for Information Security: The Role of Online Platforms in Bug Bounty Programs
Johannes Wachs
Security is an essential cornerstone of functioning digital marketplaces and communities. If users doubt that data shared online will remain secure, they will withdraw from platfor…
Computational Approaches to the Study of Corruption
Isabela Villamil, János Kertész, Johannes Wachs
Studying corruption presents unique challenges. Recent work in the spirit of computational social science exploits newly available data and methods to give a fresh perspective on t…
The Geography of Open Source Software: Evidence from GitHub
Johannes Wachs, Mariusz Nitecki, William Schueller +1
Open Source Software (OSS) plays an important role in the digital economy. Yet although software production is amenable to remote collaboration and its outputs are easily shared ac…
Mining DEV for social and technical insights about software development
Maria Papoutsoglou, Johannes Wachs, Georgia M. Kapitsaki
Software developers are social creatures: they communicate, collaborate, and promote their work in a variety of channels. Twitter, GitHub, Stack Overflow, and other platforms offer…
Publishing patterns reflect political polarization in news media
Nick Hagar, Johannes Wachs, Emőke-Ágnes Horvát
Digital news outlets rely on a variety of outside contributors, from freelance journalists, to political commentators, to executives and politicians. These external dependencies cr…
Does Crowdfunding Really Foster Innovation? Evidence from the Board Game Industry
Johannes Wachs, Balazs Vedres
Crowdfunding offers inventors and entrepreneurs alternative access to resources with which they can develop and realize their ideas. Besides helping to secure capital, crowdfunding…
From Asking to Answering: Getting More Involved on Stack Overflow
Timur Bachschi, Aniko Hannak, Florian Lemmerich +1
Online knowledge platforms such as Stack Overflow and Wikipedia rely on a large and diverse contributor community. Despite efforts to facilitate onboarding of new users, relatively…
Complexity science approach to economic crime
János Kertész, Johannes Wachs
In this comment we discuss how complexity science and network science are particularly useful for identifying and describing the hidden traces of economic misbehaviour such as frau…
How Gamification Affects Software Developers: Cautionary Evidence from a Natural Experiment on GitHub
Lukas Moldon, Markus Strohmaier, Johannes Wachs
We examine how the behavior of software developers changes in response to removing gamification elements from GitHub, an online platform for collaborative programming and software…
The Effects of Gender Signals and Performance in Online Product Reviews
Sandipan Sikdar, Rachneet Singh Sachdeva, Johannes Wachs +2
This work quantifies the effects of signaling and performing gender on the success of reviews written on the popular amazon shopping platform. Highly rated reviews play an importan…
Inequality is rising where social network segregation interacts with urban topology
Gergő Tóth, Johannes Wachs, Riccardo Di Clemente +4
Social networks amplify inequalities due to fundamental mechanisms of social tie formation such as homophily and triadic closure. These forces sharpen social segregation reflected…
Corruption Risk in Contracting Markets: A Network Science Perspective
Johannes Wachs, Mihály Fazekas, János Kertész
We use methods from network science to analyze corruption risk in a large administrative dataset of over 4 million public procurement contracts from European Union member states co…
A network approach to cartel detection in public auction markets
Johannes Wachs, János Kertész
Competing firms can increase profits by setting prices collectively, imposing significant costs on consumers. Such groups of firms are known as cartels and because this behavior is…
Gender Differences in Participation and Reward on Stack Overflow
Anna May, Johannes Wachs, Aniko Hannak
Programming is a valuable skill in the labor market, making the underrepresentation of women in computing an increasingly important issue. Online question and answer platforms serv…
Social capital predicts corruption risk in towns
Johannes Wachs, Taha Yasseri, Balázs Lengyel +1
Corruption is a social plague: gains accrue to small groups, while its costs are borne by everyone. Significant variation in its level between and within countries suggests a relat…
And Now for Something Completely Different: Visual Novelty in an Online Network of Designers
Johannes Wachs, Bálint Daróczy, Anikó Hannák +2
Novelty is a key ingredient of innovation but quantifying it is difficult. This is especially true for visual work like graphic design. Using designs shared on an online social net…
Why Do Men Get More Attention? Exploring Factors Behind Success in an Online Design Community
Johannes Wachs, Anikó Hannák, András Vörös +1
Online platforms are an increasingly popular tool for people to produce, promote or sell their work. However recent studies indicate that social disparities and biases present in t…