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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 4,781 GitHub stars. Install it by copying the skill folder into your agent's skills directory.

github.com/brycewang-stanford/Auto-Empirical-Research-Skills/skills/39-vincentarelbundock-marginaleffects (opens in a new tab)

Data as of from the GitHub API; description from the skill's SKILL.md. Report an error

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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 marginaleffects

In 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 projects

Standalone 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 projects

Source (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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FAQ

Marginaleffects FAQ

Still curious? Email info@appsgit.com.

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 20, 2026. Its latest release is v2026.07. appsgit only lists skills from repositories with a commit in the last six months.