A General Model of Author “Style” with Application to the UK House of Commons, 1935–2018 Leslie Huang1, Patrick O. Perry2 and Arthur Spirling 3 1 Graduate Student, Center for Data Science, New York University, 60 Fih Avenue, New York, NY 10011, USA. Email:
[email protected] 2 Senior Data Scientist, Oscar Health; Visiting Scholar, Center for Data Science, New York University, 60 Fih Avenue, New York, NY 10011, USA. Email:
[email protected] 3 Professor of Politics and Data Science, New York University, 19 W4th St, New York, NY 10012, USA. https://doi.org/10.1017/pan.2019.49 . Email:
[email protected] Abstract We consider evidence for the assertion that backbench members of parliament (MPs) in the UK have become less distinctive from one another in terms of their speech. Noting that this claim has considerable normative and substantive implications, we review theory and findings in the area, which are ultimately ambiguous on this question. We then provide a new statistical model of distinctiveness that extends traditional eorts to statistically characterize the “style” of authors and apply it to a corpus of Hansard speeches from 1935 to 2018. In the aggregate, we find no evidence for the claim of more homogeneity. But this hides intriguing covariate https://www.cambridge.org/core/terms eects: at the MP-level, panel regression results demonstrate that on average, more senior backbenchers tend to be less “dierent” in speech terms. We also show, however, that this pattern is changing: in recent times, it is more experienced MPs who speak most distinctively.