Hanjo Hamann
Max Planck Society
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Publication
Featured researches published by Hanjo Hamann.
PLOS ONE | 2016
Christoph Engel; Hanjo Hamann
The (German) market for law professors fulfils the conditions for a hog cycle: In the short run, supply cannot be extended or limited; future law professors must be hired soon after they first present themselves, or leave the market; demand is inelastic. Using a comprehensive German dataset, we show that the number of market entries today is negatively correlated with the number of market entries eight years ago. This suggests short-sighted behavior of young scholars at the time when they decide to prepare for the market. Using our statistical model, we make out-of-sample predictions for the German academic market in law until 2020.
Rechtswissenschaft. Zeitschrift für rechtswissenschaftliche Forschung | 2014
Hanjo Hamann
505 Motivbundel: Eine kommunikationspsychologische Theorie der Fusnote . . C. 509 Praktische Erprobung: Pilotstudien zur Zitationsanalyse . . . . . . . . . . . . . . . . . . . . . . . . . D. 512 Datenerhebung .. . . . . . . . . . . . . . . . . . . . . . . I. 512 Datenaufbereitung . . . . . . . . . . . . . . . . . . . . II. 516 Datenauswertung . . . . . . . . . . . . . . . . . . . . . III. 518 Publikationsflut und dunkle Materie . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 518 Zeitschriftenranking .. . . . . . . . . . . . . 2. 521 Einflussmessung einzelner Artikel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3. 524 Klassiker der Aufsatzliteratur . . . 4. 527 Diskussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV. 529 Geringe Stichprobengrose . . . . . . . 1. 529 Mangelnde Datenqualitat und technische Fehler . . . . . . . . . . . . . . . . . 2. 530 Beschrankung auf ein einziges Medium .. . . . . . . . . . . . . . . . . . . . . . . . . . 3. 530 Ausblick: Die Zukunft der Zitationsanalyse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. 532
Berkeley Business Law Journal | 2014
Hanjo Hamann
Collegial decision-making is relevant for a host of legal questions and in particular for corporate law. What do we know about its empirical effects? Less than we could. As of yet, pertinent review articles usually (1) assume rather than analyse inhowfar the law actually mandates collegial decision-making, (2) rely mostly on “classical” studies or those from behavioral economics, while underrating a centurys worth of previous empirical research, and (3) review the evidence anecdotally with little regard for the robustness of findings. As a consequence, scholars from corporate law and economics even today rely on theories and evidence which were disproved already years ago. The present paper is a remedy. It combines a thorough comparative analysis of corporate statutes with a comprehensive research of empirical evidence, resulting in an assessment of the robust empirical effects of collegial decision-making. Finding — as this paper does — that groups tend to deteriorate decision quality and exacerbate bias relative to their best decision-maker, corporate law is called upon to design institutional remedies. Knowing more about these empirical effects will help scholars to identify and eliminate faulty arguments and improve policy and the legal discourse as a whole.
Archive | 2012
Christoph Engel; Hanjo Hamann
The market for law professors fulfils the conditions for a hog cycle: in the short run, supply cannot be extended or limited; future law professors must be hired soon after they first present themselves, or leave the market; demand is inelastic. Using a comprehensive German dataset, we show that the number of market entries today is significantly negatively correlated with the number of market entries 8 years ago. This is quite precisely the time young scholars on average take to prepare for the market. To get this estimate, we detrend the data, and we control for the size of student cohorts when these candidates enter university. This control variable mediates the effect of birth cohorts when candidates are born, which themselves exhibit negative autocorrelation, with a lag of some 20 years. Using our statistical model, we make out of sample predictions for the German academic market in law until 2020.
Archive | 2017
Hanjo Hamann; Friedemann Vogel
Die nachstehenden Uberlegungen zum Verhaltnis von Quantitat und Qualitat im Deutungs- und Erkenntnisprozess der Wissenschaften beruhen auf einer Begegnung sehr unterschiedlicher und dabei doch verwandter Disziplinen: Im Rahmen des Projekts „Juristisches Referenzkorpus“ (JuReko), das seit 2014 von der Heidelberger Akademie der Wissenschaften gefordert wird, erproben wir Moglichkeiten und Grenzen einer „computergestutzten Rechtslinguistik“. Dazu dient der Aufbau eines Referenzkorpus des deutschsprachigen Rechts, d.h. einer aufbereiteten Sammlung juristischer Texte aus besonders relevanten Domanen (Gesetzgebung, Rechtsprechung, Rechtswissenschaft) und verschiedenen Rechtsgebieten (Zivil-, Straf-, Verwaltungs-, Wirtschaftsrecht usw.) als Grundlage fur semiautomatische Studien aus juristischer, linguistischer und sozialwissenschaftlicher Perspektive.
Jura - Juristische Ausbildung | 2017
Hanjo Hamann
Von jungen Jurist(inn)en wird zunehmend Aufgeschlossenheit für empirische Forschung erwartet. Schon eines der traditionsreichsten juristischen Lehrbücher – die Digesten Iustinians –war der Ansicht, »dass zur Rechtskenntnis nicht nur das Wissen um die Rechtsnormen (iusti atque iniusti scientia), sondern auch die Einsicht in die menschliche Wirklichkeit gehört (humanarum rerum notitia).« Bis heute fehlt es jedoch an Handreichungen, wie sich solche empirischen Einsichten in juristische Studienund Qualifikationsarbeiten integrieren lassen. Der vorliegende Aufsatz schafft Abhilfe und entwickelt ein Prüfungsschema für die »Rezeption« empirischer Erkenntnisse in juristischen Ausbildungsarbeiten.
International Journal of Language & Law (JLL) | 2017
Friedemann Vogel; Hanjo Hamann; Dieter Stein; Andreas Abegg; Łucja Biel; Lawrence M. Solan
What do patterns in legal language tell us about power, policy and justice? This question was at the heart of a conference on “The Fabric of Language and Law: Discovering Patterns through Legal Corpus Linguistics”, convened in March 2016 by the international research group “Computer Assisted Legal Linguistics” (CAL²) under the auspices of the Heidelberg Academy of Sciences. About forty scholars from Germany, Switzerland, Italy, Poland, Spain and the US brought together their different intellectual and disciplinary perspectives on computational linguistics and legal thinking. Concluding the conference, four legal linguistics experts – two native linguists, two native lawyers – discussed the perspectives and limitations of computer-assisted legal linguistics. Their debate, which this article faithfully reproduces, touches on some of the essential epistemological issues of interdisciplinary research and evidence-based policy, and marks the way forward for legal corpus linguistics. Cite as: Vogel et al. , JLL 6 (2017), 90–100, DOI: 10.14762/jll.2017.090
Law and Social Inquiry-journal of The American Bar Foundation | 2017
Friedemann Vogel; Hanjo Hamann; Isabelle Gauer
BYU Law Review | 2017
Hanjo Hamann; Friedemann Vogel
The Winnower | 2016
Friedemann Vogel; Hanjo Hamann; Dieter Stein; Andreas Abegg; Łucja Biel; Lawrence M. Solan