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A Bayesian Hierarchical Topic Model for Political Texts: Measuring Expressed Agendas in Senate Press Releases

  • Justin Grimmer (a1)
Abstract

Political scientists lack methods to efficiently measure the priorities political actors emphasize in statements. To address this limitation, I introduce a statistical model that attends to the structure of political rhetoric when measuring expressed priorities: statements are naturally organized by author. The expressed agenda model exploits this structure to simultaneously estimate the topics in the texts, as well as the attention political actors allocate to the estimated topics. I apply the method to a collection of over 24,000 press releases from senators from 2007, which I demonstrate is an ideal medium to measure how senators explain their work in Washington to constituents. A set of examples validates the estimated priorities and demonstrates their usefulness for testing theories of how members of Congress communicate with constituents. The statistical model and its extensions will be made available in a forthcoming free software package for the R computing language.

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e-mail: jgrimmer@fas.harvard.edu (corresponding author)
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Author's note: I thank the Center for American Political Studies and the Institute for Quantitative Social Science for financial support. I have benefited from conversations with Ken Benoit, Matt Blackwell, Daniel Carpenter, Jacqueline Chattopadhyay, Andrew Coe, Brian Feinstein, Rob Franzese, Claudine Gay, Jeff Gill, David Hadley, Frank Howland, Emily Hickey, D. Sunshine Hillygus, Daniel Hopkins, Michael Kellerman, Gary King, Burt Monroe, Clayton Nall, Stephen Purpura, Kevin Quinn, Brandon Stewart, seminar participants at Harvard University, participants at the 2008 Summer Political Methodology meeting, and 2009 Southern Political Science Association meeting.

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This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

John Aitchison . 1986. The statistical analysis of compositional data. New York: Chapman and Hall.

Elizabeth Armstrong , Daniel Carpenter , and Marie Hojnacki . 2006. “Whose deaths matter? Mortality, advocacy, and attention to disease in the mass media.” Journal of Health Politics, Policy and Law 31(4): 729–72.

Elizabeth Armstrong , Daniel Carpenter , and Marie Hojnacki . 2006. “Whose deaths matter? Mortality, advocacy, and attention to disease in the mass media.” Journal of Health Politics, Policy and Law 31(4): 729–72.

D. Billheimer , Peter Guttorp , and William F. Fagan 2001. “Statistical interpretation of species composition.” Journal of the American Statistical Association 96(456): 1205–15.

D. Billheimer , Peter Guttorp , and William F. Fagan 2001. “Statistical interpretation of species composition.” Journal of the American Statistical Association 96(456): 1205–15.

Bruce Cain , John Ferejohn , and Morris Fiorina . 1987. The personal vote: Constituency service and electoral independence. Cambridge, MA: Harvard University Press.

Bruce Cain , John Ferejohn , and Morris Fiorina . 1987. The personal vote: Constituency service and electoral independence. Cambridge, MA: Harvard University Press.

Timothy Cook . 1988. “Press secretaries and media strategies in the House of Representatives: Deciding whom to pursue.” American Journal of Political Science 32(4): 1047–69.

Timothy Cook . 1988. “Press secretaries and media strategies in the House of Representatives: Deciding whom to pursue.” American Journal of Political Science 32(4): 1047–69.

Chris Fraley , and Adrian Raftery . 2002. “Model-based clustering, discriminant analysis, and density estimation.” Journal of the American Statistical Association 97(458): 611.

Mathhew Gabel , and Kenneth Scheve . 2007. “Estimating the effect of elite communications on public opinion.” American Journal of Political Science 51(4): 1013–28.

Mathhew Gabel , and Kenneth Scheve . 2007. “Estimating the effect of elite communications on public opinion.” American Journal of Political Science 51(4): 1013–28.

Andrew Gelman , and Gary King . 1990. “Estimating incumbency advantage without bias.” American Journal of Political Science 34(4): 1142–64.

Andrew Gelman , and Gary King . 1990. “Estimating incumbency advantage without bias.” American Journal of Political Science 34(4): 1142–64.

Trevor Hastie , Robert Tibshirani , and Jerome Friedman . 2001. The elements of statistical learning. New York: Springer.

Trevor Hastie , Robert Tibshirani , and Jerome Friedman . 2001. The elements of statistical learning. New York: Springer.

Kim Quaile Hill , and Patricia Hurley . 2002. “Symbolic speeches in the US Senate and their representational implications.” Journal of Politics 64(1): 219–31.

Kim Quaile Hill , and Patricia Hurley . 2002. “Symbolic speeches in the US Senate and their representational implications.” Journal of Politics 64(1): 219–31.

Dustin Hillard , Stephen Purpura , and John Wilkerson . 2008. “Computer-assisted topic classification for mixed-methods social science research.” Journal of Information Technology and Politics 4(4): 3146.

Michael Jordan , Zoubin Ghahramani , Tommi Jaakkola , and Lawrence K. Saul 1999. “An Introduction to variational methods for graphical models.” Machine Learning 37: 183233.

Michael Jordan , Zoubin Ghahramani , Tommi Jaakkola , and Lawrence K. Saul 1999. “An Introduction to variational methods for graphical models.” Machine Learning 37: 183233.

John Kingdon . 1989. Congressmen's voting decisions. Ann Arbor: University of Michigan.

John Kingdon . 1989. Congressmen's voting decisions. Ann Arbor: University of Michigan.

Frances Lee . 2008. “Dividers, not uniters: Presidential leadership and Senate partisanship, 1981–2004.” Journal of Politics 70(4): 914–28.

Frances Lee . 2008. “Dividers, not uniters: Presidential leadership and Senate partisanship, 1981–2004.” Journal of Politics 70(4): 914–28.

Daniel Lipinski . 2004. Congressional communication: Content and consequences. Ann Arbor: University of Michigan Press.

Christopher Manning , Prabhakar Raghavan , and Hinrich Schütze . 2008. Introduction to information retrieval. Cambridge: Cambridge University Press.

Jane Mansbridge . 2003. “Rethinking representation.” American Political Science Review 97(4): 515–28.

Geoffrey McLachlan , and David Peel . 2000. Finite mixture models. New York: John Wiley & Sons.

Geoffrey McLachlan , and David Peel . 2000. Finite mixture models. New York: John Wiley & Sons.

John Petrocik . 1996. “Issue ownership in presidential elections, with a 1980 case study.” American Journal of Political Science 40(3): 825–50.

John Petrocik . 1996. “Issue ownership in presidential elections, with a 1980 case study.” American Journal of Political Science 40(3): 825–50.

Martin Porter . 1980. “An algorithm for suffix stripping.” Program 14(3): 130–7.

Brian Schaffner . 2006. “Local news coverage and the incumbency advantage in the US house.” Legislative Studies Quarterly 31(4): 491511.

Brian Schaffner . 2006. “Local news coverage and the incumbency advantage in the US house.” Legislative Studies Quarterly 31(4): 491511.

Lee Sigelman , and Emmitt Buell . 2004. “Avoidance or engagement? Issue convergence in US presidential campaigns, 1960–2000.” American Journal of Political Science 48(4): 650–61.

Adam Simon . 2002. The winning message: Candidate behavior, campaign discourse, and democracy Cambridge, UK: Cambridge University Press.

Adam Simon . 2002. The winning message: Candidate behavior, campaign discourse, and democracy Cambridge, UK: Cambridge University Press.

Tracy Sulkin . 2005. Issue politics in congress. Cambridge: Cambridge University Press.

Tracy Sulkin . 2005. Issue politics in congress. Cambridge: Cambridge University Press.

Y. Teh , M. Jordan , M. Beal , and D. Blei 2006. “Hierarchical Dirichlet processes.” Journal of the American Statistical Association 101(476): 1566–81.

Y. Teh , M. Jordan , M. Beal , and D. Blei 2006. “Hierarchical Dirichlet processes.” Journal of the American Statistical Association 101(476): 1566–81.

D. H. Wolpert , and W. G. Macready 1997. “No free lunch theorems for optimization.” IEEE Transactions on Evolutionary Computation 1(1): 6782.

Diana Evans Yiannakis 1982. “House members’ communication styles: Newsletter and press releases.” Journal of Politics 44(4): 1049–71.

Diana Evans Yiannakis 1982. “House members’ communication styles: Newsletter and press releases.” Journal of Politics 44(4): 1049–71.

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Political Analysis
  • ISSN: 1047-1987
  • EISSN: 1476-4989
  • URL: /core/journals/political-analysis
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