New Books in Science, Technology, and Society

Noah Giansiracusa, "Robin Hood Math: Take Control of the Algorithms That Run Your Life" (Penguin, 2025)

Aug 20, 2025
In this enlightening discussion, Noah Giansiracusa, an award-winning mathematician and author, reveals how algorithms shape our lives while often benefiting the few. He explains 'Robin Hood math' as a tool for individuals to reclaim power over their data. Topics like the manipulation of social media algorithms, the importance of understanding expected value in gambling and insurance, and the impact of logarithmic perception on our view of money are unpacked. Giansiracusa empowers listeners to become more algorithmically literate and make informed decisions.
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INSIGHT

Rankings Are Weighted Recipes

  • College rankings are weighted formulas combining many factors into one score rather than an objective truth.
  • You can make personalized rankings by choosing weights that reflect your values instead of accepting a one-size result.
ANECDOTE

Class-Size Gaming Example

  • Universities altered class rosters so certain courses dropped below an arbitrary 'under 20' cutoff that U.S. News valued.
  • That manipulation improved rankings for some classes while harming others, revealing gaming of the system.
INSIGHT

Weighted Sums Drive Many Scores

  • Weighted sums reappear across many domains as the core method of combining factors into a single score.
  • Understanding weights reveals which inputs truly matter in systems like credit scores and rankings.
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