Digital Trace Data to Measure Human Mobility
summary
Survey of non‑traditional mobility sources shows concrete trade-offs and gaps: CDR/XDR produce aggregated origin‑destination matrices, while GPS and Bluetooth produce individual trajectories and can capture indoor movements, and the CDRC already offers secure, high‑granularity access. Key problems are a practical privacy–accuracy trade‑off (differential privacy and anonymization reduce utility), two kinds of bias (device access and usage intensity), poor interoperability across platforms, unreliable validation against decade‑old census baselines, and ad hoc methods instead of standards for weighting and linkage.
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chapters (8)
- 0:00Introduction to mobility data
- 3:40Data sources for human mobility
- 6:31Ethics and privacy challenges
- 9:03Data accessibility issues
- 11:11Data integration and interoperability
- 12:14Bias in mobility data
- 14:19Methodological challenges
- 17:50Future directions and solutions
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