The Halo Effect

The Halo Effect

Phil Rosenzweig

A Tier
When to Read
Right after Good to Great or Built to Last, to calibrate how much of the business-book canon you can actually trust. Otherwise once you've read enough of the genre to have something to stress test.
Main Takeaway
Provisional, but: company success creates a halo that contaminates everything we believe about what caused it. Correlation dressed up as principle.
Style
Theoretical
Practical

Just started this one, so treat everything here as provisional. Phil Rosenzweig's pitch is that most celebrated business research is contaminated by the halo effect: we judge everything a company does through the glow of its results. If a company is winning, every decision looks brilliant; the moment it struggles, the same decisions look reckless. The book takes apart the methodology behind Good to Great, In Search of Excellence, and their whole genre, showing that much of what they present as causal principles is just successful companies being described through success-colored glasses. That hits home because I rated Good to Great and Built to Last S tier on this very site, so I'm reading this as much as a stress test of my own shelf as anything else. Early chapters are sharp and I'm enjoying the contrarian punch. I'll update once I'm done.

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