TB: Freakonomics (Levitt & Dubner)
Core Thesis
Morality represents how people would like the world to work; economics represents how it actually does. By applying economic analysis — particularly careful attention to incentives and data — to unexpected questions, patterns emerge that conventional wisdom completely misses.
Key Takeaways
On incentives
- Incentives are the cornerstone of modern life; understanding them is the key to understanding just about any riddle.
- Any incentive is inherently a trade-off. The trick is to balance the extremes.
- IF economics is a science primarily concerned with incentives, it is also a science of statistical tools for measuring how people respond to them.
- April 15, 1987: 7 million American children suddenly disappeared — the IRS required Social Security Numbers for dependents; 10% of all dependents were fraudulent.
On information and expertise
- "Experts" use their informational advantage to serve their own agenda — but can be beaten at their own game.
- Knowing what to measure and how to measure it makes a complicated world much less so.
- Conventional wisdom is often shoddily formed and devilishly difficult to see through.
- Dramatic effects often have distant, even subtle causes.
- The conventional wisdom is often wrong.
On data and causation
- Romanian communist party forced pregnancy tests on women — the resulting unwanted children grew up to be violent; the ceausescu regime was the only one to meet a violent end during the Soviet collapse.
- Be honest about your weaknesses.
Mental Models
- Incentives Matter — the book's fundamental thesis
- Second-Order Thinking — distant causes of dramatic effects
- Inversion — noticing where conventional wisdom may be false