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111 records from EconBiz based on author Name
1. The editor and the algorithm : recommendation technology in online news
Peukert, Christian; Sen, Ananya; Claussen, Jörg;2024
Type: Aufsatz in Zeitschrift; Article in journal;
Availability: Link Link
2. The hidden costs of the platform economy : tax dishonesty by Airbnb hosts
Ross, Johannes; Rocha, Vera; Grad, Tom; Claussen, Jörg;2024
Type: Graue Literatur; Non-commercial literature; Arbeitspapier; Working Paper;
Availability:
Link 3. (How) does user-generated content impact content generated by professionals? : evidence from local news
Sen, Ananya; Grad, Tom; Ferreira, Pedro; Claussen, Jörg;2024
Type: Aufsatz in Zeitschrift; Article in journal;
Availability: Link Link
4. What drives project success in online labour markets? : a bilateral perspective on freelancers and clients
Seifried, Mareike; Kretschmer, Tobias; Khashabi, Pooyan; Claussen, Jörg;2024
Type: Aufsatz in Zeitschrift; Article in journal;
Availability: Link Link
5. Seeking Analysts : User-Generated Analyst Coverage and Stock Market Quality
abstractDoes user-generated analyst coverage improve the market quality of covered stocks? We use articles published on the platform SeekingAlpha and measure market quality using trading volume, share turnover, and bid-ask spreads. To account for endogenous stock selection, we employ (i) an instrumental variables approach exploiting two changes in the platform’s monetary incentive structure and (ii) a difference-in-differences approach using propensity score matching. We find that user-generated analyst coverage increases trading and turnover, while the effect on bid-ask spreads is ambiguous: while we observe a substantial decrease in quarters with coverage, we find no effect in the month following initiation. The effects are more pronounced for smaller stocks without professional analyst coverage. We identify increased (retail) investor attention as the likely driver of the observed effects
Claussen, Jörg; Litterscheidt, Rouven; Streich, David;2023
Availability: Link Link
6. Two to tango? : psychological contract breach in online labor markets
abstractDespite some advantages over traditional (offline) labor markets - such as lower search costs, better matching and improved monitoring - online labor markets (OLMs) have not taken off as initially expected. In this paper, we study the factors that limit perceived project success on OLMs. Using psychological contract theory, we theorize how common OLM features including contracts with virtual monitoring, multi-freelancer projects, and simultaneous projects by a client trigger the perception of psychological contract breach among OLM participants and reduce perceived project success for both participants. We test these hypotheses using an extensive dataset with more than 143,000 transactions on the world’s largest freelancing platform, Upwork, and find that - contrary to predictions from agency theory - projects equipped with strict freelancer monitoring (hourly-pay contracts) and projects enabling peer comparison (multi-freelancer projects or multiple simultaneous projects), lead to lower perceived project success both from the freelancer’s and the client’s perspective. Our work implies that transactions on online labor markets should not be viewed solely as agency relations, and that some features that supposedly reduce agency costs and improve efficiency on OLMs come at the cost of triggering the perception of psychological contract breach.
Claussen, Jörg; Kretschmer, Tobias; Khashabi, Pooyan; Seifried, Mareike;2020
Type: Graue Literatur; Non-commercial literature; Arbeitspapier; Working Paper;
Availability: Link
Link Link Link Link 7. The editor vs. the algorithm : returns to data and externalities in online news
abstractWe run a field experiment to quantify the economic returns to data and informational externalities associated with algorithmic recommendation relative to human curation in the context of online news. Our results show that personalized recommendation can outperform human curation in terms of user engagement, though this crucially depends on the amount of personal data. Limited individual data or breaking news leads the editor to outperform the algorithm. Additional data helps algorithmic performance but diminishing economic returns set in rapidly. Investigating informational externalities highlights that personalized recommendation reduces consumption diversity. Moreover, users associated with lower levels of digital literacy and more extreme political views engage more with algorithmic recommendations.
Claussen, Jörg; Peukert, Christian; Sen, Ananya;2019
Type: Graue Literatur; Non-commercial literature; Arbeitspapier; Working Paper;
Availability:
Link Link 8. Follow the money : online piracy and self-regulation in the advertising industry
abstractIn this paper, we study the effects of a self-regulatory effort, orchestrated by the European Commission, that aims to reduce advertising revenues for publishers of copyright infringing content. Historical data lets us follow how the third-party advertising and tracking services associated with a large number of piracy websites and a corresponding set of legitimate "placebo" websites change after the agreement to self-regulate went in place. We find that larger EU-based advertisers comply with the initiative and reduce their connections with piracy websites. We do not find reductions for other non-advertising services that track consumers, which has potentially important implications for the efficiency of targeted advertising.
Batikas, Michail; Claussen, Jörg; Peukert, Christian;2018
Type: Graue Literatur; Non-commercial literature; Arbeitspapier; Working Paper;
Availability: Link Link
9. Two to Tango? Psychological Contract Breach in Online Labor Markets
abstractDespite some advantages over traditional (offline) labor markets – such as lower search costs, better matching and improved monitoring – online labor markets (OLMs) have not taken off as initially expected. In this paper, we study the factors that limit perceived project success on OLMs. Using psychological contract theory, we theorize how common OLM features including contracts with virtual monitoring, multi-freelancer projects, and simultaneous projects by a client trigger the perception of psychological contract breach among OLM participants and reduce perceived project success for both participants. We test these hypotheses using an extensive dataset with more than 143,000 transactions on the world’s largest freelancing platform, Upwork, and find that – contrary to predictions from agency theory – projects equipped with strict freelancer monitoring (hourly-pay contracts) and projects enabling peer comparison (multi-freelancer projects or multiple simultaneous projects), lead to lower perceived project success both from the freelancer’s and the client’s perspective. Our work implies that transactions on online labor markets should not be viewed solely as agency relations, and that some features that supposedly reduce agency costs and improve efficiency on OLMs come at the cost of triggering the perception of psychological contract breach
Claussen, Jörg; Kretschmer, Tobias; Khashabi, Pooyan; Seifried, Mareike;2021
Availability: Link Link
10. (How) Does UGC Impact Professionals? Evidence from Local News
abstractToday, many platforms host user-generated content (UGC) and content by professionals side by side. However, behavior of UGC and professionals is mostly studied in isolation. In this paper, we study the spillover effects from UGC on content from professionals in the context of the news industry. We use an exogenous shock to the supply of UGC to identify spillover effects on the output of professionals as well as the implications for the business model of online platforms. Using data from a network of 122 local news outlets hosted by an online news platform, we find that in response to the reduction in the supply of user-generated news, which mainly is driven by reduced output from experienced users, inexperienced professionals significantly increase their output. However, we find a decrease in overall content on the platform, one which is especially pronounced for local news. We further show that this likely has detrimental effects on the business model of the online platform, with a decrease in viewership and articles and an increase in the quantity of content by professionals, who are paid by the platform. Thus, our work contributes to the literature of UGC and online platforms, as well as the literature on local news
Claussen, Jörg; Ferreira, Pedro; Grad, Tom; Sen, Ananya;2021
Availability: Link Link
