• Corpus ID: 252780459

Same Root Different Leaves: Time Series and Cross-Sectional Methods in Panel Data

@inproceedings{Shen2022SameRD,
  title={Same Root Different Leaves: Time Series and Cross-Sectional Methods in Panel Data},
  author={Dennis Shen and Peng Ding and Jasjeet S. Sekhon and Bin Yu},
  year={2022}
}
A central goal in social science is to evaluate the causal effect of a policy. One dominant approach is through panel data analysis in which the behaviors of multiple units are observed over time. The information across time and space motivates two general approaches: (i) horizontal regression (i.e., unconfoundedness), which exploits time series patterns, and (ii) vertical regression (e.g., synthetic controls), which exploits cross-sectional patterns. Conventional wisdom states that the two… 

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