Replication package for "Infusion rather than upheaval: An embedding-based analysis of topic lineages and disruption in AI research after ChatGPT"

Code and derived data for the article above. The code collects the OpenAlex sample, fits yearly SPECTER2 topics and their lineages, measures LLM exposure and the CD index, and produces every table and figure. The data contain the sampled OpenAlex work identifiers, yearly topics, lineage links and document-level measures. Bibliographic data come from OpenAlex (CC0); titles and abstracts are not redistributed.