Vierzig-Prozent-Regel für mit der Personenwahl verbundene Verhält- niswahlen: Empirische Überprüfung einer praktischen Hypothese

2021 ◽  
Vol 52 (3) ◽  
pp. 669-674
Author(s):  
Wolfgang Bischof ◽  
Friedrich Pukelsheim ◽  
Maria Stelz

Based on empirical data from German elections after WW II, 765 test instances are con­structed to examine the forty-percent-rule . This rule states that all winners of single-seat­constituencies can be integrated into the proportional representation outcome provided the number of constituencies equals forty percent of the nominal size of parliament . While the traditional fifty percent share usually leads to overhang seats, a share of forty percent leads to overhang seats in only twenty-two of the 765 test instances .

2021 ◽  
Vol 235 ◽  
pp. 01031
Author(s):  
Yekai Li

The effectiveness of the stock market is an important indicator to measure the efficiency of capital allocation in the secondary financial market, and is of great significance to the operation of the national economy. Whether the Mainland China’s stock market is weakly effective has always been controversial. This article uses the measurement method to conduct empirical data research on the five randomly selected stocks and the Shanghai Composite Index, analyzes the conclusions and analyzes the underlying reasons that lead to the low effectiveness of the Mainland China stock market.


Author(s):  
Debi A. LaPlante ◽  
Heather M. Gray ◽  
Pat M. Williams ◽  
Sarah E. Nelson

Abstract. Aims: To discuss and review the latest research related to gambling expansion. Method: We completed a literature review and empirical comparison of peer reviewed findings related to gambling expansion and subsequent gambling-related changes among the population. Results: Although gambling expansion is associated with changes in gambling and gambling-related problems, empirical studies suggest that these effects are mixed and the available literature is limited. For example, the peer review literature suggests that most post-expansion gambling outcomes (i. e., 22 of 34 possible expansion outcomes; 64.7 %) indicate no observable change or a decrease in gambling outcomes, and a minority (i. e., 12 of 34 possible expansion outcomes; 35.3 %) indicate an increase in gambling outcomes. Conclusions: Empirical data related to gambling expansion suggests that its effects are more complex than frequently considered; however, evidence-based intervention might help prepare jurisdictions to deal with potential consequences. Jurisdictions can develop and evaluate responsible gambling programs to try to mitigate the impacts of expanded gambling.


Author(s):  
Virginie Crollen ◽  
Julie Castronovo ◽  
Xavier Seron

Over the last 30 years, numerical estimation has been largely studied. Recently, Castronovo and Seron (2007) proposed the bi-directional mapping hypothesis in order to account for the finding that dependent on the type of estimation task (perception vs. production of numerosities), reverse patterns of performance are found (i.e., under- and over-estimation, respectively). Here, we further investigated this hypothesis by submitting adult participants to three types of numerical estimation task: (1) a perception task, in which participants had to estimate the numerosity of a non-symbolic collection; (2) a production task, in which participants had to approximately produce the numerosity of a symbolic numerical input; and (3) a reproduction task, in which participants had to reproduce the numerosity of a non-symbolic numerical input. Our results gave further support to the finding that different patterns of performance are found according to the type of estimation task: (1) under-estimation in the perception task; (2) over-estimation in the production task; and (3) accurate estimation in the reproduction task. Moreover, correlation analyses revealed that the more a participant under-estimated in the perception task, the more he/she over-estimated in the production task. We discussed these empirical data by showing how they can be accounted by the bi-directional mapping hypothesis ( Castronovo & Seron, 2007 ).


1993 ◽  
Vol 38 (9) ◽  
pp. 991-992
Author(s):  
Seymour Fisher
Keyword(s):  

2009 ◽  
Author(s):  
Lori Katz ◽  
Andrei Novac ◽  
Bita Ghafoori ◽  
Toni Pusateri
Keyword(s):  

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