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panel-data-guide
Panel data analysis with fixed and random effects models
skills/analysis/econometrics/panel-data-guide/SKILL.md
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# Panel Data Analysis Guide
Estimate and interpret fixed effects, random effects, and dynamic panel models using Stata, R, and Python for longitudinal/panel datasets.
## What Is Panel Data?
Panel data (also called longitudinal or cross-sectional time-series data) tracks the same units (individuals, firms, countries) across multiple time periods. This structure enables:
- Controlling for unobserved heterogeneity (time-invariant omitted variables)
- Studying dynamic relationships (how X at time t affects Y at time t+1)
- Increased statistical power through more observations
### Data Structure
