Marginaleffects
Marginaleffects is an agent skill (a SKILL.md file) from brycewang-stanford/Auto-Empirical-Research-Skills. Manual for the marginaleffects R and Python package, and guide to the book "Model to Meaning". It works with Claude Code and Codex and has 4,511 GitHub stars. Install it by copying the skill folder into your agent's skills directory.
- Plugin marketplace
- Testing & QA
- Actively maintained
Add this skill
Claude
This repository is a Claude Code plugin marketplace. In Claude Code:
/plugin marketplace add brycewang-stanford/Auto-Empirical-Research-Skills
/plugin # browse auto-empirical-research-skills and install the plugin that contains marginaleffectsIn the Claude apps, zip the marginaleffects folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).
ChatGPT / Codex
Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:
git clone --depth 1 https://github.com/brycewang-stanford/Auto-Empirical-Research-Skills.git
cp -r Auto-Empirical-Research-Skills/skills/39-vincentarelbundock-marginaleffects .agents/skills/marginaleffects # repo; ~/.agents/skills for all projectsStandalone skills also load in the ChatGPT desktop app.
Cursor
Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:
git clone --depth 1 https://github.com/brycewang-stanford/Auto-Empirical-Research-Skills.git
cp -r Auto-Empirical-Research-Skills/skills/39-vincentarelbundock-marginaleffects .cursor/skills/marginaleffects # project; ~/.cursor/skills for all projectsSource (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)
What this skill does
Manual for the marginaleffects R and Python package, and guide to the book "Model to Meaning". Use when users ask about predictions, comparisons, slopes, marginal effects, average treatment effects (ATE/ATT/CATE), hypothesis testing, contrasts, counterfactuals, risk ratios, odds ratios, causal inference with G-computation, or need help with marginaleffects functions like predictions(), comparisons(), slopes(), hypotheses(), datagrid(), avgpredictions(), avgcomparisons(), avg_slopes(), or plot…
When it triggers
- Use when users ask about predictions, comparisons, slopes, marginal effects, average treatment effects (ATE/ATT/CATE), hypothesis testing, contrasts, counterfactuals, risk ratios, odds ratios, causal inference with G-computation, or need he
- "Model to Meaning"
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What is the Marginaleffects skill?
Marginaleffects is an agent skill (a SKILL.md file) from brycewang-stanford/Auto-Empirical-Research-Skills. Manual for the marginaleffects R and Python package, and guide to the book "Model to Meaning". It works with Claude Code and Codex and has 4,511 GitHub stars. Install it by copying the skill folder into your agent's skills directory. Its SKILL.md lives at github.com/brycewang-stanford/Auto-Empirical-Research-Skills/skills/39-vincentarelbundock-marginaleffects.
How do I install the Marginaleffects skill?
In Claude Code, run /plugin marketplace add brycewang-stanford/Auto-Empirical-Research-Skills, then install its plugin from /plugin. For Codex or Cursor, copy the marginaleffects folder into .agents/skills/ or .cursor/skills/.
Is the Marginaleffects skill free?
Yes. The repository is open source under the CC-BY-4.0 license.
Is Marginaleffects maintained?
The repository's most recent commit was on Oct 5, 2026. Its latest release is v2026.07. appsgit only lists skills from repositories with a commit in the last six months.