Supplemental materials:

- 1_clean_data.ipynb: Python notebook to clean and pre-process Twitter data for regression analysis
- 2_zinb_regressions.ipynb: R notebook to run main models (ZINB for count and logged OLS for duration)
- alt_models: folder containing alternative model specifications (NB and ZIP for count) as R notebooks
- Template Audit Trail.pdf: pdf file containing all iterations of the codebook evolution
- tweet_ids.csv: csv file containing Tweet IDs, original referenced tweet IDs, and reference types, for all engagement tweets used in the analyses.
