designing-experiments
Selects the appropriate quasi-experimental method (DiD, ITS, SC) based on data structure and research questions. Use when the user is unsure which method to apply.
npx skills add majiayu000/claude-skill-registry --skill designing-experiments-foryourhealth111-pix-vibe-skills --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Designing Experiments Helps select the appropriate causal inference method. ## Decision Framework 1. **Control Group?** * **Yes**: Go to Step 2. * **No**: Consider **Interrupted Time Series (ITS)**. 2. **Unit Structure?** * **Single Treated Unit**: * With multiple controls: **Synthetic Control (SC)**. * No controls: **ITS**. * **Multiple Treated Units**: * With control group: **Difference-in-Differences (DiD)**. 3. **Time Structure?** * **Panel Data** (Multiple units over time): Required for DiD and SC. * **Time Series** (Single unit over time): Required for ITS. ## Method Quick Reference * **Difference-in-Differences (DiD)**: Compares trend changes between treated and control groups. Assumes **Parallel Trends**. * **Interrupted Time Series (ITS)**: Analyzes trend/level change for a single unit after intervention. Assumes **Trend Continuity**. * **Synthetic Control (SC)**: Constructs a synthetic counterfactual from weighted control units. Assumes **Convex Hull** (treated unit within range of controls).
- Decision Framework
- Method Quick Reference
What does the designing-experiments skill do?
Selects the appropriate quasi-experimental method (DiD, ITS, SC) based on data structure and research questions. Use when the user is unsure which method to apply.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill designing-experiments-foryourhealth111-pix-vibe-skills --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.