News from the IAAEU




  • Position as a research associate (f/m)
    On 1 October 2018 and 1 December 2018, the Institute for Labour Law and Industrial Relations in the European Union (IAAEU) at Trier University will each be vacant as a research associate (PhD student). Please find further information here.

  • Position as a research associate (f/m)
    On 1 October 2018, the Institute for Labour Law and Industrial Relations in the European Union (IAAEU) at Trier University is to fill a position as a research associate in the legal team. Please find further information here.

  • 11. Workshop on Labour Economics
    The IAAEU and the Chair of Personnel Economics at Trier University are pleased to announce the 11. Workshop on Labour Economics, to be held on April 12-13, 2019. More information will follow soon.



Prizes, Distinctions & News


  • Research Cooperation with Dr. Ulrich Zierahn
    From 23.07.-25.07.2018 Dr. Ulrich Zierahn was active as a guest researcher at the IAAEU. He is a Senior Researcher at ZEW. During his stay Mr. Zierahn worked together with Dr. Marco de Pinto on the joint third-party funded project "Local labour markets - The causes and consequences of spatial differences in labour market outcomes across cities in France and Germany". Here, the researchers are investigating the reallocation of the workforce due to increasing international interdependence.

  • Project-Workshop "Crowdsourcing as a New Form of Labour Organisation"

    On Thursday the 12th of July, the IAAEU together with researchers from the University of Bremen hosted the Project-Workshop "Crowdsourcing as a New Form of Labour Organisation" in the institute’s Max-Weber-Room. The goal of the workshop was the interdisciplinary examination of current questions surrounding crowdsourcing, from both economic and legal perspectives. The workshop was opened by Dr. Thomas Klein with his lecture "An Introduction to the Legal Problem of Minimum Wage for Crowdworkers de lege ferenda". In his talk, Dr. Klein first described the legal framework for arrangement model behind the contractual relationship into which crowdworkers enter in order to ascertain, in a second step, if current legal provisions would support the minimum wage for crowdworkers. Following that, Lisa Nagel presented her work on the question "Does Group Identification Affect the Performance of Crowdworkers?", whereby she studied whether a crowdworker’s identification with their platform influences work performance. Katrin Treppschuh examined four different US and British court decisions to determine the place of crowdworkers in their respective legal systems in her presentation "The Crowdworkers’ Legal Status in US American and British Jurisprudence". The first part of the workshop was closed by Eliza Stenzhorn’s presentation "How does Platform Design and Competition Affect the Welfare Distribution among Crowdworkers, Crowdsourcers and Platforms?", in which she studied the transferability of an crowdworker’s online reputation between platforms and the advantages and disadvantages associated with them. The second day of the workshop was opened by Dominik Leist with his contribution "Collective Contracts for Platform Employees". He described simple legal and constitutional rulings on crowdworker collective associations and investigated what role European monopoly laws could play in that context. The workshop was closed by Dr. Lars Hornuf with his presentation on the topic "Crowdsourced Innovation: How Community Managers Affect Crowd Activities". The individual presentations concluded with in-depth discussions among the workshop participants.


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Impressions of the Workshop

  • Are workers and trade unions allowed to strike on company premises?
    Workers demonstrating with flags and posters in front of a factory gate - images that many associate with a strike. But are trade unions and employees allowed to use the employer's premises at all for this purpose or can the employer prohibit the use with reference to his domestic authority? This question is the subject of a current study by Dr. Thomas Klein, published in the May issue of the journal Arbeit und Recht (p. 216 ff.). Klein concludes that the employer's domiciliary right must withdraw from the union's right to strike if the use of the company premises is necessary for communication with employees and the interests of the employer are not unduly affected. This can be assumed, for example, if the premises are extensive and communication with the employees at the entrance to the site is not possible. The union's pickets should then, for example, address workers at the company car park and inform them about the strike and the strike targets. Against the background of currently pending appeals at the Federal Labour Court concerning ver.di's strike measures on Amazon's premises, the study has a high degree of practical relevance.

  • International law binding character of the rulings of the ILO monitoring committees

    On 23.04.2018 the IAAEU invited Hendric Stolzenberg LL.M. Eur., research assistant at the Institute for Civil and Business Law at the Goethe University Frankfurt am Main, to give a lecture at the Institute. He spoke on the topic Binding International Law of the Proceedings of the ILO Monitoring Committees". The event ended with a discussion of around 20 participants.


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Hendric Stolzenberg in front of the participants

  • Workshop on Labour Economics 2018 at the IAAEU

    On the 13th and 14th of April 2018, the 10. Workshop on Labour Economics of the Economic Working Group at the IAAEU took place. Compared to the previous year, the already high number of submissions was exceeded once again, with almost 80 papers suitable for presentations - a clear indicator of the increasing awareness and relevance of the conference among labour market economists in Germany and Europe. Around 35 scientists from all over Europe and China were selected from all submissions to present their current research results in numerous parallel and poster sessions. In terms of content, the submissions focused primarily on the optimal design of labour market institutions, for example, how strict the protection against dismissal should be, or which characteristics should form an optimal unemployment insurance system. Max Friese from the University of Rostock addressed the question of whether unemployment insurance is efficient, if it diversifies its risk over large geographical areas - in other words, whether, for example, it makes sense to have joint unemployment insurance for all EU states. The research questions of Mario Bossler and Duncan Roth - both from the IAB in Nuremberg - and Karsten Staehr from the University of Tallinn are also highly topical in political terms; all three authors examined the labour market and employment effects of minimum wages in different ways. Moderate changes in the level of a minimum wage seem to have negligible effects on employment, but at the same time, minimum wages can effectively compensate wage inequality. Once again this year, the workshop was promoted by the special support of young scientists: About half of the invited scientists are currently in the doctoral phase and are therefore particularly dependent on expert advice and feedback from established senior researchers. At this point, the workshop continues each year and provides each young researcher with an experienced research mentor. Following his own presentation, this mentor critically discusses and questions the research, but also appreciates it. "I have only received so many new implications for my own research at a few conferences so far," said the doctoral student Max Friese from the University of Rostock, for example, where the contribution of his discussant led to a lively discussion with the other participants of the lecture. This year's IAAEU Best Paper Award went to Laura Khoury, a PhD student from the Paris School of Economics. In her working paper entitled "Unemployment Benefits and the Timing of Dismissals: Evidence from Bunching at a Notch in France", she shows that it can be effective for certain workers and companies in France to register temporarily unemployed and receive unemployment benefits. This incentive is particularly attractive to certain groups of highly qualified people. The aim of the French unemployment insurance system of primarily financing low-skilled workers on a transitional basis and enabling them to return to work quickly is therefore being opposed and needs to be reformed. We thank all participants of this year's workshop and look forward to a further exchange and especially a reunion at the Workshop on Labour Economics 2019 in Trier next year.


Impressions of the Workshop


  • Hugo Sinzheimer Prize 2017 for Dr. Thomas Klein
    On March 22, 2018, Dr. Thomas Klein was awarded the Hugo Sinzheimer Prize 2017. The prize, dedicated to the jurist Hugo Sinzheimer, is awarded annually by the Hugo Sinzheimer Institute for Labor Law (HSI) in Frankfurt am Main for outstanding dissertations on labor law completed at a German-speaking university. The prizewinner was selected by a jury comprising Prof. Dr. Dr. h. c. Ulrich Preis (University of Cologne), Prof. Dr. Marlene Schmidt (Director Hugo Sinzheimer Institute) and Prof. Dr. Bernd Waas (Goethe University Frankfurt am Main). The prize was awarded to Dr. Thomas Klein's dissertation on the topic "The right to collective bargaining and strike for civil servants in privatised companies using the example of postal successor companies", which was written between 2013 and 2016 under the supervision of Prof. Dr. Dr. h. c. Monika Schlachter and published by Nomos Verlag in 2017. In his laudation, Prof. Dr. Jens Schubert (Leuphana Universit) acknowledged the outstanding scientific achievements of the work, which made an important contribution to the current discussion on the right to strike by civil servants. The award ceremony took place as part of the annual Sinzheimer Lecture at the Goethe University in Frankfurt am Main.


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f.l.t.r. Prof. Dr. Antoine T.J.M. Jacobs (Tilburg University), Dr. Johannes Heuschmid (HSI), Dr. Thomas Klein, Prof. Dr. Dr. h. c. Monika Schlachter, Dr. Daniel Hlava (HSI), Prof. Dr. Jens Schubert (Leuphana University Lüneburg)

  • Excursion to the European Court of Justice, Luxembourg
    On February 27, 2018, the Chair of Public Law, International Law and European Law of Prof. Dr. Alexander Proelß, the Chair of German and Foreign Public Law, Constitutional Church Law and International Law of Prof. Dr. Alexander Proelß, held a conference on the topic of "International Law of the Church". Dr. Antje von Ungern-Sternberg, M.A. and the IAAEU legal team of Prof. Dr. Dr. Dr. h. c. Monika Schlachter took an excursion to the European Court of Justice in Luxembourg. The educational trip was aimed at students and doctoral candidates of the Faculty of Law at the University of Trier. The visit to the ECJ focused on participation in the hearing in the IR case (C-468/17). The interpretation of the Anti-Discrimination Directive 2000/78/EC in relation to the German provision of § 9 AGG, which allows the religious communities in Germany to permit unequal treatment in employment/occupation on the basis of religion or ideology according to their own self-conception, was discussed. The case was referred to the ECJ for a preliminary ruling by the German Federal Labour Court. In preparation for the oral hearing, Dr. Thomas Klein and Prof. Dr. Antje von Ungern-Sternberg, M.A. gave an introduction to the relevant aspects of labour law, constitutional law, international law and European law at the lecture at the court hearing at Trier University.

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Participants of the excursion at the ECJ

  • The health suitability as a prerequisite for access to the civil service for life?
    On the 14th of December 2017 Anna Donner, research associate at the IAAEU, successfully finished her disputation. It was examined under the chairmanship of Prof. Dr. Antje von Ungern-Sternberg, M.A., Prof. Dr. Timo Hebeler and Prof. Dr. Dr. h. c. Monika Schlachter. Ms. Donner's dissertation on the topic "Die gesundheitliche Eignung als Zugangsvoraussetzung zum Beamtenverhältnis - Ein Auswahlkriterium fernab des Leistungsgrundsatzes gemäß Art. 33 Abs. 2 GG im Spannungsgefüge zwischen fehlenden Rechtsgrundlagen und Diskriminierung aufgrund der Behinderung" is to be published in 2018.


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Prof. Dr. Timo Hebeler, Anna Donner, Prof. Dr. Dr. h. c. Monika Schlachter, Prof. Dr. Antje von Ungern-Sternberg, M.A.

  • The concept of employment under social law in the digital world of work
    On the 5th of February 2018, the IAAEU was allowed to welcome Dr. Christian Mecke, judge at the Federal Social Court, to a lecture at the institute. He gave a lecture on the topic "The concept of social law employment in the digital world of work". The event ended with a discussion of the participants.

  • Labour Law Seminar in Trier
    On the 17th of November 2017, this year’s labour law seminar took place under the direction of Prof. Dr. Dr. h.c. Monika Schlachter. About 25 labour law and social lawyers from all over Germany participated in the event. Dr. Thomas Klein opened the seminar with a lecture on the organization of strikes at the employer’s factory premises with a subsequent discussion. Dr. Hans-Jürgen Rupp raised questions on the prohibition of evidence problems in the labour court process and presented his own approach to a possible solution. The seminar ended with the following discussion.

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The seminar participants in the Max-Weber-Room at the IAAEU


  • The IAAEU welcomes Jonas Feld

    Since October 1st, 2017 the IAAEU has a new employee. Mr. Jonas Feld, M.Sc., has joined the economics working group. Between 2010 and 2015 he earned his Bachelor Degrees in Economics and Political Science from Trier University.  During this time he also spent one year at Lancaster University in England. From 2015 to 2017, he further studied Economics in a double master’s program, earning a M.Sc. in Economics at Trier University and a Magister in International Economics from University of Warsaw. So far, his main research interests focus international trade and labor market economics. We are very excited about the collaboration and wish Mr. Feld all the best during his doctoral studies.

  • Adrian Chadi Follows the Call to a Junior Professorship

    After five years of post-doctoral research at the Institute for Labour Law and Industrial Relations in the European Union (IAAEU), Dr. Adrian Chadi will be assuming a W1-Junior Professorship for Personnel Economics and Human Resource Management at the University of Konstanz, beginning on the 1st of October, 2017. The IAAEU congratulates Adrian Chadi for his honourable calling to Konstanz, thanks him for his exceptional work and wishes him all the best during this new phase of his academic career. When he arrives in Konstanz, Adrian Chadi will continue to research along lines he has pursued at the IAAEU, where he published a number of high-profile studies in the area of personnel economics (see:Oxford Economic PapersManagement Science and Journal of Economics & Management Strategy). In the future, his research will become more focused on behavioral economic aspects, due in part to the excellent resources for this work at the University of Konstanz, both in terms of personnel and organizational structures. Adrian Chadi will also maintain a strong connection with the IAAEU, not least due to several joint research projects, be it on educational economics or in the area of labour market research.

  • IAAEU Employees at the 7th Assistants‘ Conference for Labour Law

    From the 27th to the 29th of July 2017, the 7th assistants’ conference for labour law took place at the Bucerius Law School in Hamburg.  Over one hundred young researchers attended the conference and spent three days discussing legal changes and innovations under the motto "The Awoken Legislature in Labour Law – Regulation and Deregulation in Labour Law".  Dr. Thomas Klein and Dominik Leist were panel participants in a podium discussion on the constitutionality of § 11 Abs. 5 AÜG, a law forbidding the use of temporary workers as strikebreakers.  Some legal literature had expressed concerns about the constitutionality of the new law and it thus provided an excellent opportunity for the participants in Hamburg to engage in a controversial discussion of contemporary legal problems. Both of the participants from Trier used their keynote speeches and their time during the podium discussion to explain the necessity and constitutionality of the new regulations.

  • IAAEU Labour Law Working Group Excursion to the European Court of Justice

    On the 18th of July, the labour law working group from the IAAEU under the leadership of Prof. Dr. Dr. h. c. Monika Schlachter went on an excursion to the European Court of Justice in Luxembourg.  The field trip was intended for students and doctoral candidates from the University of Trier School of Law.  The main purpose of the excursion was to observe the oral proceedings from the case Egenberger (C-414/16).  The case concerns religious discrimination in ideological enterprises and the day’s proceedings took place in the main chamber of the ECJ.  The case was submitted to the ECJ by the German Federal Labour Court for preliminary ruling.

  • W2 Professorship for Lars Hornuf
    After almost three years, Junior Professor Dr. Lars Hornuf will be leaving the Institute for Labour Law and Industrial Relations in the European Union (IAAEU) to follow the call to a W2 Professorship in Business Administration, dealing in particular with finance services, at the University of Bremen. Following Vanessa Mertins who, in 2015, assumed a W2 Professorship at the University of Vechta, as well as Mario MechtelSabrina Jeworrek and Adrian Chadi who have all been name W1 Professors, Dr. Hornuf’s move to Bremen is a shining example of the IAAEU’s personnel politics. During his time at the IAAEU, Lars Hornuf finished a DFG project on crowdinvesting which he began before moving to the IAAEU, won two competitive calls for proposals from the Federal Ministry for Finances and published 17 articles in journals including, among others, the International Review of Law and Economics, the Journal of Corporate Finance, the California Management Review as well as Small Business Economics.  The excellent conditions for research at the institute also allowed him to take part in 53 national and international workshops and conferences. Among those events attended were the annual conferences of the American Law and Economics Association at Columbia and Yale Law School, the European Finance Association and the European Economic Association as well as the Law and Economics Forum of the London School of Economics. In addition, Lars Hornuf was invited to be a panelist at this year’s G20 Finance Conference in Wiesbaden. During his time at the IAAEU, he was also a Visiting Research Fellow at the Social Science Research Institute, Duke University as well as Visiting Researcher at the Georgetown Law School. He was also named Affiliate Member of the CESifo Research Network, Research Fellow at the Centers of Finance of the University of Regensburg as well as Affiliated Research Fellow at the Max-Planck-Institute for Innovation and Competition.

    Lars Hornuf’s research at the University of Bremen will be focused on the digitalisation of the finance and innovation markets. He will continue to work in cooperation with the IAAEU through a joint research project which was recently approved for funding by the DFG on the topic of "Crowdsourcing as a New Form of Labour Organisation: Regulation Requirements and Welfare Effects."

  • IAAEU Secures a Third-Party Funded Project from the DFG
    The Directors of the IAAEU, Prof. Dr. Dr. h.c. Monika Schlachter and Prof. Dr. Laszlo Goerke, together with Prof. Dr. Lars Hornuf, were able to secure a third-party funded project from the German Research Foundation (DFG) in August 2017.  The project deals with crowdsourcing as a new form of labour organisation and studies specifically the regulatory requirements and welfare effects of crowdsourcing. The research project is scheduled to run for 3 years with a funding of € 460,000 in total.  These resources will be used primarily to fund three research positions with the duties of investigating economic and legal aspects of crowdworking. The economic portion of the research project will be lead in large by Prof. Dr. Lars Hornuf, who, beginning on the 1st of October 2017, will be assuming a professorship at the University of Bremen. Dr. Thomas Klein (This email address is being protected from spambots. You need JavaScript enabled to view it.) will be the coordinating partner at the IAAEU.