“Alerts Over Time”, Gwern2013-07-01 (R, CLI, survival analysis, Google; backlinks)⁠:

Does Google Alerts return fewer results each year? A statistical investigation

Has Google Alerts been sending fewer results the past few years? Yes. Responding to rumors of its demise, I investigate the number of results in my personal Google Alerts notifications 2007^–₆2013_11ya, and find no overall trend of decline until I look at a transition in mid-2011 where the results fall dramatically. I speculate about the cause and implications for Alerts’s future.

• Data
• Analysis
  • Descriptive
  • Linear Model
    • Per Alert
  • Multi-Level Model
  • What about the Fall?
    • It Was Mid-2011
      • Robustness
    • Panda?
• Conclusion
• See Also
• External Links

Backlinks: