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  • Bonn: Bundestag  (2)
  • COPERNICUS GESELLSCHAFT MBH  (1)
  • Düsseldorf: Hans-Böckler-Stiftung, Wirtschafts- und Sozialwissenschaftliches Institut (WSI)  (1)
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  • 1
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    Düsseldorf: Hans-Böckler-Stiftung, Wirtschafts- und Sozialwissenschaftliches Institut (WSI)
    Publication Date: 2018-06-27
    Description: In economics and other social sciences, complex processes are often represented by numerical models of reality which more or less well reflect behavioral relationships and interactions. Such attempts are the subject of a lecture course 'Mathematical Theory of Democracy' by the author at the Faculty of Economics of the Karlsruhe Institute of Technology. One new result in this field is presented here in the form of a statistical test to decide whether a political party or coalition of parties represents a majority of the population. For this purpose, party or coalition positions on a sample of policy issues, like introduction of a legal nationwide minimum wage, privatization of railways, and others, are compared with the results of public opinion polls on the same issues. The test is based on estimating the statistical significance of the coincidence observed (i.e. how likely is the coincidence by chance) to the end of accepting or rejecting the representativeness hypothesis. The test is developed for single parties and coalitions of two or three parties. It is illustrated with an estimation of representativeness of five major German parties and their potential coalitions basing on the official party manifestos published before the German parliamentary elections 2009 and on relevant polls of public opinion.
    Description: In der Ökonomie und den anderen Sozialwissenschaften wird immer wieder versucht, komplexe Prozesse der Wirklichkeit durch numerische Modelle abzubilden - was mit Abstraktionen für z. B. Verhaltens- und Wirkungsrelationen mehr oder weniger gut gelingt. Solche Versuche sind Gegenstand einer Vorlesungsreihe 'Mathematische Theorie der Demokratie' des Autors an der Wirtschaftswissenschaftlichen Fakultät des Karlsruhe Institut für Technologie. Ein neues Ergebnis in diesem Bereich wird hier vorgelegt in Form eines statistischen Tests, der entscheiden soll, ob eine politische Partei oder eine Parteienkoalition repräsentativ im Sinn der Bevölkerungsmehrheit agiert. Zu diesem Zweck wird die Übereinstimmung von Parteien- oder Koalitionspositionen mit Ergebnissen von Meinungsumfragen in der Bevölkerung verglichen, etwa zur Einführung eines bundesweiten gesetzlichen Mindestlohns oder der Privatisierung des Schienenverkehrs und anderem mehr. Der Test basiert auf der Einschätzung der statistischen Signifikanz der beobachteten Übereinstimmung (d.h. wie wahrscheinlich ist eine nur zufällige Übereinstimmung), um die Hypothese von der Repräsentativität der Politik zu akzeptieren oder abzulehnen. Die Studie spielt die Repräsentativität von einzelnen Parteien sowie von Zweier- und Dreier-Koalitionen durch. Darunter ist auch die Konstellation der fünf großen deutschen Parteien und ihrer potentiell möglichen Koalitionen auf der Basis der Bundestagswahl von 2009.
    Keywords: C12 ; C44 ; C63 ; D71 ; D72 ; ddc:330 ; mathematical theory of democracy ; statistical test ; parties ; coalitions ; representativeness ; Bernoulli matrices ; sums of random vectors ; Demokratie ; Politische Partei ; Öffentliche Meinung ; Wahlverhalten ; Deutschland
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: English
    Type: doc-type:workingPaper
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  • 2
    Publication Date: 2019-07-17
    Description: The last deglaciation is one of the best constrained global-scale climate changes documented by climate archives. Nevertheless, understanding of the underlying dynamics is still limited, especially with respect to abrupt climate shifts and associated changes in the Atlantic meridional overturning circulation (AMOC) during glacial and deglacial periods. A fundamental issue is how to obtain an appropriate climate state at the Last Glacial Maximum (LGM, 21 000 yr before present, 21 ka BP) that can be used as an initial condition for deglaciation. With the aid of a comprehensive climate model, we found that initial ocean states play an important role on the equilibrium timescale of the simulated glacial ocean. Independent of the initialization, the climatological surface characteristics are similar and quasi-stationary, even when trends in the deep ocean are still significant, which provides an explanation for the large spread of simulated LGM ocean states among the Paleoclimate Modeling Intercomparison Project phase 2 (PMIP2) models. Accordingly, we emphasize that caution must be taken when alleged quasi-stationary states, inferred on the basis of surface properties, are used as a reference for both model inter-comparison and data model comparison. The simulated ocean state with the most realistic AMOC is characterized by a pronounced vertical stratification, in line with reconstructions. Hosing experiments further suggest that the response of the glacial ocean is dependent on the ocean background state, i.e. only the state with robust stratification shows an overshoot behavior in the North Atlantic. We propose that the salinity stratification represents a key control on the AMOC pattern and its transient response to perturbations. Furthermore, additional experiments suggest that the stratified deep ocean formed prior to the LGM during a time of minimum obliquity (~ 27 ka BP). This indicates that changes in the glacial deep ocean already occur before the last deglaciation. In combination, these findings represent a new paradigm for the LGM and the last deglaciation, which challenges the conventional evaluation of glacial and deglacial AMOC changes based on an ocean state derived from 21 ka BP boundary conditions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , NonPeerReviewed
    Format: application/pdf
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  • 3
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    Bonn: Bundestag
    Publication Date: 2019-08-01
    Keywords: ddc:330 ; Wirtschaftslage ; Wirtschaftspolitische Beratung ; Deutschland
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: German
    Type: doc-type:report
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  • 4
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    Bonn: Bundestag
    Publication Date: 2019-08-01
    Keywords: ddc:330
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: German
    Type: doc-type:report
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