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Mia Costa

@miacosta.bsky.social
1.7K followers 160 following 12 posts

Political scientist, Associate professor @ Dartmouth Govt / Affil Quant Social Science.

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Reposted by Mia Costa
Dartmouth Arts and Sciences @dartmouthartsci.bsky.social · 25/08/2026
"This is just wreaking havoc in an election with real stakes and no real interest in understanding the effects of what you are doing.” Professor @miacosta.bsky.social comments on fabricated polls released as a "social experiment" to test how false information spreads through the political ecosystem.
nytimes.com
Fake Polls in Wisconsin and California Were Part of a ‘Social Experiment’
Median Strategies revealed that recent polls from the group were intended to expose how easily false results can be spread.
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Nicholas Grossman @nicholasgrossman.bsky.social · 24/07/2026
If we don’t record any COVID cases, then the pandemic isn’t real, and the president saying it’ll simply disappear soon wasn’t BS — now applied to war.
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Mia Costa @miacosta.bsky.social · 28/06/2026
Kind of spinning about this... super duper grateful that the book has found readers. Thanks to everyone who gave me tons of feedback on it and for @uchicagopress.bsky.social for being a great press!
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Dartmouth Arts and Sciences @dartmouthartsci.bsky.social · 26/06/2026
. @miacosta.bsky.social’s “How Politicians Polarize” received the American Political Science Association's Best Book Award from the Experimental Research Section, Richard Fenno Prize for Best Book from the Legislative Studies Section, and Alan Rosenthal Prize from the Legislative Studies Section.
Photo of Mia Costa with text overlay that reads, “Mia Costa, Associate Professor of Government. Best Book Awards from the American Political Science Association.”
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British Journal of Political Science @bjpols.bsky.social · 11/02/2026
NEW - Descriptive or Partisan Representation? Examining Trade-Offs for Asian Americans - cup.org/45Y91Bz - John J. Cho, @miacosta.bsky.social & @yusakuhoriuchi.bsky.social #OpenAccess
BJPolS abstract text discussing research on voting preferences among Asian Americans in the U.S., focusing on 'co-ethnic' (same ethnicity) and 'cross-ethnic' (different ethnicity but within the same racial group) political representation.
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Yusaku Horiuchi @yusakuhoriuchi.bsky.social · 11/02/2026
@bjpols.bsky.social New Open Access article in the BJPS cup.org/45Y91Bz. Examine how Asian Americans weigh descriptive vs. partisan representation—and demonstrate the value of "choice-level" conjoint analysis (see forthcoming AJPS: gking.harvard.edu/conjointE). Earlier version = Cho’s honors thesis!
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Mia Costa @miacosta.bsky.social · 06/01/2026
If you need a cite backing up that issues commonly associated with African Americans (like criminal justice and poverty) *are actually perceived to be* associated with African Americans and we aren't just all talking out of our @$$ assuming that criminal justice=Black, Tatishe and I did the work:
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Cambridge University Press Political Science & IR @cambup-polsci.cambridge.org · 18/12/2025
#OpenAccess from @journalrep.bsky.social - Representing Black and White: The Role of Candidate Issue Priorities in Perceptions of Representation - cup.org/3KSlfEw - @miacosta.bsky.social & Tatishe Mavovosi Nteta #FirstView
Logo of JREP with the hashtag OpenAccess on a grey background dotted with red circles.
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Mia Costa @miacosta.bsky.social · 29/08/2025
Good info in this Experiments newsletter, including: AI/LLM respondents, conjoints in rural development settings, repeated measure designs, & when and why to prioritize data quality over representativeness (from me and John). ⬇️ I'll send you the pdf if link is gated. :)
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APSA Experimental Research Section @experimentsapsa.bsky.social · 26/08/2025
There's a new issue of the section newsletter out! This one's on sample considerations in experiments: professional survey-takers, LLM usage, rural contexts, and more! connect.apsanet.org/s42/newslett...
screenshot of the top of the first page of the fall 2025 experiments section newsletter
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Matt Grossmann @mattgrossmann.bsky.social · 25/06/2025
If we don’t like polarizing politicians, why do we get them? Negative partisan rhetoric gets the retweets, but not the voters New #ScienceOfPolitics podcast/transcript with Mia Costa www.niskanencenter.org/if-we-dont-l...
niskanencenter.org
If we don’t like polarizing politicians, why do we get them? - Niskanen Center
Mia Costa finds that political elites have more polarized views of the other side than the public but they still benefit electorally and legislatively from avoiding negative partisan attacks.
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Mia Costa @miacosta.bsky.social · 27/03/2025
My book is now officially out! How Politicians Polarize introduces and documents the concept of "negative representation" – when representatives focus on the other side rather than their own. Some key findings: 🧵 www.amazon.com/How-Politici...
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Inequality and Distributive Politics - IDP @inqdp.bsky.social · 21/03/2025
5/6 🧵 In @ajpseditor.bsky.social @miacosta.bsky.social & @miguelpereira.bsky.social study how occupational backgrounds shape MPs' ability to garner support for their policies. Survey experiments in 🇩🇪 🇺🇸 🇸🇪. Find some experience credibility bonus among citizens & politicians. doi.org/pbhp
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American Journal of Political Science (AJPS) @ajpseditor.bsky.social · 27/02/2025
Why parties can benefit from promoting occupational diversity in legislatures: Experimental evidence from three countries by Mia Costa and Miguel M. Pereira is now available in Early View. @miacosta.bsky.social @miguelpereira.bsky.social ajps.org/2025/02/26/w...
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Zack Albert @zalbert.bsky.social · 19/11/2024
This might create incentives for elites to stoke fears about other side. But it could also result in less polarized candidates if otherwise ideological prim voters elevate other considerations. Of course this is all conditional on having a competitive general election & good info about electability
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Zack Albert @zalbert.bsky.social · 19/11/2024
We suspect (but don't test) that this helps explain primary dynamics like Biden in 2020. This was the original motivation for the project. Fear and hatred of the other side elevates stakes of election, which in turn elevates importance of electability/elite cues about this trait in nominations
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Zack Albert @zalbert.bsky.social · 19/11/2024
Here we show results from 2 conjoints. 1) shows marginal effect of being "likely to win" (vs lose) on vote choice based on out-party ratings, controlling for ideology alignment. 2) shows win vs. toss up, controlling for policy agreement. Electability always matters most for negative partisans
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Zack Albert @zalbert.bsky.social · 19/11/2024
New @polbehavior.bsky.social paper with @miacosta.bsky.social. We show that voters with more negative views of the other party (negative partisans) are more likely to care about candidate electability & even willing to give up representation for better chance to win link.springer.com/article/10.1...
link.springer.com
Winning At All Costs? How Negative Partisanship Affects Voter Decision-Making - Political Behavior
Do voters who dislike the other side prefer candidates who can win, even if they are less representative? Negative partisanship is an important feature of American politics, but few scholars have exam...
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John V. Kane @uptonorwell.bsky.social · 15/10/2024
🚨 Now up on @APSA_Preprints, my paper w/ the great @miacosta.bsky.social on how to deal with inattentiveness in conjoint experiments. Details below! 👇 preprints.apsanet.org/engage/apsa/...
preprints.apsanet.org
Being Careful with Conjoints: Accounting for Inattentiveness in Conjoint Experiments
In typical survey experiments–i.e., experiments that involve a relatively limited amount of manipulated content–respondent inattentiveness tends to bias treatment effect estimates toward zero. Such bi...
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Lily Mason @lilymasonphd.bsky.social · 27/09/2024
Republicans who stand up to Trump are regularly terrorized by their fellow partisans. It’s a commonly known consequence, but we don’t hear much about it.
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eric gonzalez juenke @egojunk.bsky.social · 27/09/2024
Why do we lack parity in gender representation in Congress? One reason is "party-driven descriptive representation." Nearly half of D candidates are women compared to 1 in 6 for R's.
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Mia Costa @miacosta.bsky.social · 19/09/2024
My first post on BlueSky. Hi! My book, HOW POLITICIANS POLARIZE, officially has a cover and I wanted to share. Coming soon in 2025 with University of Chicago Press --> press.uchicago.edu/ucp/books/bo...
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John V. Kane @uptonorwell.bsky.social · 04/09/2024
Going to #APSA2024? Come check out this great panel Sunday, featuring new work by @miacosta.bsky.social & myself. In it, we offer a simple way to capture respondent inattentiveness in conjoint experiments & w/o risking post-treatment bias (CC @brendannyhan.bsky.social). Hope to see u there! polisky
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Jason "Red5" Lyall @jaylyall.bsky.social · 08/08/2024
Job alert: A little late to the game, but we're searching for a tenure-track assistant prof in comparative politics. We're particularly interested in scholars who study East Asia, Southeast Asia, and/or South Asia. Details: apply.interfolio.com/151639
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Jason "Red5" Lyall @jaylyall.bsky.social · 22/05/2024
We're hiring two data scientists in the Social Science Data and Computing Lab here at Dartmouth. New staff would work with faculty and students. MA preferred, though BA/BS + relevant skills also considered. Some remote (1-2 days a week) possible. Please share widely!
searchjobs.dartmouth.edu
Data Scientist
Reporting to the chairs of the Departments of Economics, Government and Quantitative Social Sciences, the Data Scientist working in the Social Science Data and Computation Lab at Dartmouth College ser...
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