Philip Leifeld
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leifeld.bsky.social
Philip Leifeld
@leifeld.bsky.social
330 followers 360 following 42 posts
Professor of Social Statistics, Dept of Social Statistics, University of Manchester
Mitchell Centre for Social Network Analysis; Cathie Marsh Institute
networks • politics • statistics • public policy • complex systems
https://www.philipleifeld.com
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leifeld.bsky.social
In this new paper with @fisherdanar.bsky.social in Politics and Governance, we distinguish intrinsic and instrumental polarisation and analyse polarisation curves and phases in US climate politics. We also present new methods for discourse networks. doi.org/10.17645/pag... @cogitatiopag.bsky.social
Polarisation curve for the US Congress between 2011 and 2016, peaking around the release of the Clean Power Plan in the summer of 2015.
September 18, 2025 at 7:47 AM
leifeld.bsky.social
New article published: "A Three‐Stage Model of the Maturation of Nascent #Policy #Subsystems toward Stable #Advocacy Coalitions, with Evidence From the UK's Response to #COVID‐19", with Kristijan Garic in the Policy Studies Journal: doi.org/10.1111/psj.... #SNA #Discourse #ACF @psjeditor.bsky.social
Three stages with ideal-type network structures. The first stage shows two separate clusters of solution-oriented actors and actors with vested interests. The second stage shows a disaggregation into multiple clusters of each kind. The third stage shows emerging advocacy coalitions as clusters cutting across the two types of actors. A discourse network diagram with nodes and edges, corresponding to the first stage of the theory, with several clusters. A discourse network diagram with nodes and edges, corresponding to the second stage of the theory, with more clusters than before, in COVID-19 policy making in the UK.
June 9, 2025 at 3:54 PM
leifeld.bsky.social
More network analysis training available for external participants here at the Mitchell Centre, University of Manchester. In-person courses in Manchester 15-26 September 2025; registration deadline 30 June. www.socialsciences.manchester.ac.uk/mitchell-cen... #socialscience #sna @uomsoss.bsky.social
June 3, 2025 at 7:51 PM
leifeld.bsky.social
"Inferential Network Analysis" @methodsnet.bsky.social Summer School in Vienna is scheduled for 14-18 July. Details: methodsnet.org/course/d02-0.... Will cover ERGM, TERGM, REM, LSM, AMEN, QAP, SAOM, LOLOG, NAM; with stat theory, examples, R labs, student presentations. Registration deadline: 13 May
Six simulated networks with different coefficients as an illustration. Boxplots of distributions of four network statistics in simulated networks versus red curves showing the distributions for the observed network, as an illustration of goodness-of-fit assessment. An empirical co-authorship network as an illustration.
May 3, 2025 at 7:28 AM
leifeld.bsky.social
Jürgen Lerner (University of Konstanz) presenting on relational hyperevent models applied to citation and co-authorship networks in our Mitchell Centre for Social Network Analysis at the University of Manchester. Great stuff! @mitchellsna.bsky.social #networks #SNA #NetworkScience #NetworkAnalysis
March 19, 2025 at 4:27 PM
leifeld.bsky.social
New article published: "When does discursive change happen? Detecting phase transitions in discourse networks of sustainability transitions" with Kimberley Vandenhole and Kristijan Garic in Energy Research & Social Science: doi.org/10.1016/j.er.... #SNA #STS #SustainabilityTransitions #discourse
Three types of discourse networks: Affiliation network, actor network, and concept network. Incrementally changing networks along temporally overlapping moving time windows. Multidimensional scaling (temporal embedding) of the structural trajectory of the discourse network, heatmap, state dynamics, and cluster silhouette plot for the low-emission zone discourse in Ghent. Actor networks corresponding to the six identified phases in the empirical case study.
March 11, 2025 at 1:18 PM
leifeld.bsky.social
Arena effects in climate politics: We fit an item response model to US climate elites with the same items/beliefs across 3 data sources/arenas and examine how the arena you speak in moves your ideological position to left or right doi.org/10.1177/2053... #PoliSky #ideology #polbehavior #publicpolicy
Plot with seven rows and four columns of panels. Each panel shows one elite actor and their estimated ideological position and 95 per cent credible interval using three horizontal bars, one for Twitter, one for Congressional Testimony, and one for survey data.
February 21, 2025 at 11:41 AM