Update README.md

README.md

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-license: mit
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+---
+license: mit
+---
+
+# Automated Nonparametric Content Analysis Datasets
+
+This repository provides the four benchmark datasets used in:
+
+> Connor T. Jerzak, Gary King, and Anton Strezhnev. **An Improved Method of Automated Nonparametric Content Analysis for Social Science.** *Political Analysis*, 31(1): 42–58, 2023.
+
+Each dataset is formatted for easy loading in Python and R (CSV). Labels are integer-coded from `1,...,K`; text is provided as raw strings.
+
+## Datasets
+
+| Name            | Documents | Categories | Source & Description                                                                                                                                             |
+| --------------- | --------: | ---------: | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| **enron.csv**       |     1,426 |          5 | Corporate emails from the Enron corpus, hand-coded into five thematic categories (e.g., business, personal, legal)                                               |
+| **immigration.csv** |       462 |          5 | Newspaper editorials on immigration policy, hand-coded into five sentiment/policy categories; originally used in Hopkins & King (2010) and Jerzak et al. (2023)  |
+| **clinton.csv**     |     1,938 |          7 | Blog posts about Hillary Clinton from 2008, hand-coded into seven topical categories; feature space of \~3,623 word stems                                        |
+| **stanford.csv**    |    11,855 |          5 | Sentences from the Stanford Sentiment Treebank, labeled on a five-point sentiment scale; commonly used in text quantification research                           |
+
+
+---
+
+### Citation
+
+Connor T. Jerzak, Gary King, Anton Strezhnev. *An Improved Method of Automated Nonparametric Content Analysis for Social Science*. Political Analysis, 31(1): 42–58, 2023.
+
+```
+@article{JSK-readme2,
+  title={An Improved Method of Automated Nonparametric Content Analysis for Social Science},
+  author={Jerzak, Connor T. and Gary King and Anton Strezhnev},
+  journal={Political Analysis},
+  year={2023},
+  volume={31},
+  number={1},
+  pages={42-58}
+}
+```