Research Interests


- Voting Behavior and Party Competition

Specialization: Spatial Models of Issue Voting and Electoral Turnout

 

- Quantitative Methods in Political Science

Specialization: Discrete Choice Analysis

 

 

Publications in Peer-Reviewed Journals


 

 

 

 

Mauerer, I., Pößnecker, W., Thurner, P. W., & Tutz, G. (2015). Modeling Electoral Choices in Multiparty Systems with High-Dimensional Data: A Regularized Selection of Parameters Using the Lasso Approach. Journal of Choice Modelling 16: 23-42. doi: 10.1016/j.jocm.2015.09.004

 

 

 

Abstract:

The increased usage of discrete choice models in the analysis of multiparty elections faces one severe challenge: the proliferation of parameters, resulting in high-dimensional and difficult-to-interpret models. For example, the application of a multinomial logit model in a party system with J parties results in maximally J−1 parameters for chooser-specific attributes (e.g., sex and age). For the specification of alternative-specific attributes (usually: positions on issues and issue distances), maximally J parameters for each political issue can be estimated. Thus, a model of party choice with five parties based on three political issues and ten voter attributes already produces 59 possible coefficients. As soon as we allow for interaction effects to detect segment-specific reactions to issues, the situation is even aggravated. In order to systematically and efficiently identify relevant predictors in voting models, we derive and use Lasso-type regularized parameter selection techniques that take into account both individual- and alternative-specific variables. Most importantly, our new algorithm can handle for the first time the alternative-wise specification of the attributes of alternatives. Applying the specifically adjusted Lasso method to the 2009 German Parliamentary Election, we demonstrate that our approach massively reduces the models' complexity and simplifies their interpretation. Lasso-penalization clearly outperforms the simple ML estimator. The results are illustrated by innovative visualization methods, the so-called effect star plots.


 

 

Mauerer, I., Thurner, P. W., & Debus, M. (2015). Under Which Conditions do Parties Attract Voters’ Reactions to Issues? Party-Varying Issue Voting in German Elections 1987-2009. West European Politics 38(6): 1251–1273. doi: 10.1080/01402382.2015.1026562

 

 

 

Abstract:

Are voters’ choices influenced by parties’ position-taking and communication efforts on issues during a campaign? And if so, do voters’ reactions to issues differ across parties? This article outlines a research design for the statistical identification of party-varying issue reactions within the established paradigm of the Spatial Theory of Voting. Using a special feature of conditional logit and probit models – i.e. the estimation of alternative-specific coefficients instead of fixed ‘generic’ issue distance effects – it is possible to detect asymmetrically attached issue saliencies at the level of the voters, and hence at the demand-side of politics. This strategy opens a new way to systematically combine insights obtained by saliency approaches with the Spatial Theory of Voting. An application to the German parliamentary elections from 1987 to 2009 demonstrates that it is predominantly parties taking polar positions – and, more specifically, niche parties taking polar positions – that induce such asymmetric issue voting.


 

 

 

Thurner, P. W., Mauerer, I., & Binder, M. (2011). Parteienspezifisches Issue Voting bei den Bundestagswahlen 2002 bis 2009. In Wählen in Deutschland. Politische Vierteljahresschrift, Sonderheft 45, 302-320, ed. R. Schmitt-Beck. Baden-Baden: Nomos. [Link]

Book Projects


Mauerer, I. & Thurner, P. W. Applied Conditional Logit, Nested Logit and Mixed Logit Models. SAGE Series on Quantitative Applications in the Social Sciences. Under contract, to be published in 2018.


Mauerer, I. A Party-Varying Model of Issue-Voting. A Cross-National Study. Dissertation, LMU Munich. 

 

 

Conference Presentations


Mauerer, I. (2018, June). Measuring Voters' Party-Issue Linkages in Parliamentary Elections. Paper presented at the European Political Science Association (EPSA), Vienna, Austria.

 

Mauerer, I., Thurner, P. W. & Walter, A. S. (2017, September). Taking Ballots Seriously: Modeling Heterogeneous Choice Sets in the 2015 British Elections. Paper presented at the Elections, Public Opinion and Parties (EPOP) specialist group, Nottingham, UK.

 

Mauerer, I. (2017, July).  A Party-Varying Model of Issue Voting: A Cross-National Study. Workshop on New Developments in Spatial Models of Party Competition; organized by Bernard Grofman, Susumu Shikano, Konstantin Käppner, University of Konstanz.


Mauerer, I., Thurner, P. W. & Walter, A. S. (2017, April). Taking Real Ballots Seriously: Modeling Heterogeneous Choice Sets in the 2015 UK Elections. Paper presented at the 75th Annual Conference of the Midwest Political Science Association (MPSA), Chicago, IL, USA.


Mauerer, I. (2016, April). Modeling Heterogeneity in Issue Voting: A Mixed Logit for Spatial Issue Voting Models. Paper presented at the University of Málaga (UMA), Department of Economics, Spain.


Mauerer, I. (2015, June). Heterogeneity in Issue Voting: Applying the Mixed Logit to the Spatial Issue Voting Model. Paper presented at the 5th Annual General Conference of the European Political Science Association (EPSA), Chair of the Panel ”Issue Voting”, Vienna, Austria.


Mauerer, I. (2015, April). Heterogeneity in Spatial Models of Issue Voting. Paper presented at the 73rd Annual Conference of the Midwest Political Science Association (MPSA), Chicago, IL, USA.


Mauerer, I. (2014, July). A Cross-National Study of Issue Voting. Paper presented at the Annual Conference of the Department of Statistics (LMU), Holzhausen.


Mauerer, I., Pößnecker, W., Thurner, P. W., & Tutz, G. (2014, June). Modeling Electoral Choices in Multiparty Systems with High-Dimensional Data: A Regularized Selection of Parameters Using the Lasso Approach. Paper presented at the 4th Annual General Conference of the European Political Science Association (EPSA), Edinburgh, Scotland.


Mauerer, I., Pößnecker, W., Thurner, P. W., & Tutz, G. (2014, April). Modeling Electoral Choices in Multiparty Systems with High-Dimensional Data: A Regularized Selection of Parameters Using the Lasso Approach. Paper presented at the 72nd Annual Conference of the Midwest Political Science Association (MPSA), Chicago, IL, USA.


Mauerer, I. (2013, June). The Conditionality of Issue Voting in a Comparative Perspective. Paper presented at the 3rd Annual General Conference of the European Political Science Association (EPSA), Barcelona, Spain.


Mauerer, I. (2013, April). The Conditionality of Issue Voting in a Comparative Perspective. Paper presented at the 71st Annual Conference of the Midwest Political Science Association (MPSA), Chicago, IL, USA.


Mauerer, I., Thurner, P. W., & Prokopf, S. (2013, April). Issue Distances, Alienation, and Indifference in a Simultaneous Model of Party Choice and Abstention: An Application to German Elections 1987-2009. Roundtable at the 71st Annual Conference of the Midwest Political Science Association (MPSA), Chicago, IL, USA.


Mauerer, I., Thurner, P. W., & Prokopf, S. (2013, March). Alienation and Indifference in a Multiparty System with Coalition Governments and Ticket Splitting. Paper presented at the 41st ECPR Joint Sessions of Workshops, University of Mainz.


Mauerer, I. (2012, July). Issue-Voting bei Deutschen Bundestagswahlen. Paper presented at the Annual Conference of the Department of Statistics (LMU), Herrsching.