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All seminars will take place in room 4.02 in Pohligstraße 1, 50969 Cologne, starting at 12.00 unless noted otherwise.

Talks are organized as brown bag seminars, so please join us for catered sandwich lunch and cold beverages. Everybody interested is welcome to attend the sessions! If you have questions, please send an email to werder(at)

Currently planned seminar talks (speakers and order may change on short notice):


Research Seminar Series Summer 2024
Date Speaker Title & Abstract

May, 21th 2024


Manuel Wiesche

(TU Dortmund)

Title: Bad Client Feedback on Digital Labor Platforms: How Freelancers Deal with the Peril Posed by Negative Reviews on Upwork

Abstract: Freelancing on digital labor platforms is an important source of income for gig workers. As self-employed professionals, freelancers rely on positive reviews to attract new jobs and new clients. It is well-known that positive reviews help to attract clients by reducing uncertainty about freelancers' ability to deliver services; however, we do not know how negative reviews affect freelancers' success nor what strategies freelancers can use to deal with negative reviews. This is especially important because we know that negative reviews on e-commerce platforms undermine product sales. To identify strategies that freelancers use to overcome negative reviews, we conducted a fuzzy set qualitative comparative analysis (fsQCA) of more than 1,500 freelancer profiles. Our analysis reveals that sets of communication skills, collaboration skills, and sharing complete information influence freelancers' success. In the presence of negative ratings, we identify five pathways and six conditions that predict freelancer success on digital labor platforms. We conclude with implications for research and practice.

June, 04th 2024


Veeresh Thummadi

(University of Galway)

Title and Abstract will follow shortly!

June, 11th 2024


Julia Lehmann

(Arizona State University)

Title and Abstract will follow shortly!


June, 24th 2024


Kai Lung Hui


Title and Abstract will follow shortly!


July, 2nd 2024


Kevin Bauer

(Uni Mannheim)

Title and Abstract will follow shortly!


July, 9th 2024


Christoph Wolff

(Smart Freight Centre, Amsterdam)

Title and Abstract will follow shortly!