Data Structure
Cross-Sectional Data
A cross-sectional dataset observes each unit at one point or period in time.
Page 1 of 7 · Big Picture
The big picture: Cross-Sectional Data
What does one row represent?
Why a policy analyst should care
Cross-sectional data can describe who differs at one period, but they usually cannot establish which condition came first—an essential boundary for policy claims.
Follow the idea from the opening question to a practical decision. These are the conceptual moves this module will develop:
1 Question What does one row represent?
2 Explore Individuals observed once
3 Formalize Cross-sectional structure
4 Transfer Specify a cross-sectional analysis
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