Episode 16: Misbehaving

Episode Summary

Executive Summary: Shankar Vedantam interviews Richard Thaler about behavioral economics, highlighting how real people deviate from the rational “econ” of standard theory. Through vivid examples—mental accounting, cab drivers’ target earnings, source-based spending, and self-control failures—Thaler explains why psychology matters in economics and everyday life.

Main Topics: Behavioral economics vs. standard economics (Priority: 5/5): Thaler contrasts traditional economics’ idealized rational actor with the messy, emotional, self-controlled-by-human-beings version that behavioral economics studies. Mental accounting and fungibility (Priority: 5/5): The discussion explains how people mentally label money by purpose or source, causing them to spend and value it differently than standard theory predicts. Income source changes spending behavior (Priority: 4/5): Examples show that money earned or received differently is not treated equally; people often reserve some funds for 'serious' needs and spend others more freely. Target earning and labor supply (Priority: 4/5): Cab drivers’ tendency to stop working once they hit a daily target demonstrates that people often make decisions based on mental benchmarks rather than maximizing income. Self-control as effort (Priority: 5/5): Thaler argues that resisting temptation is work, helping explain obesity, under-saving for retirement, and other widespread self-control problems. Cold-state vs. hot-state decision making (Priority: 4/5): The conversation highlights how preferences change depending on hunger, temptation, or emotional state, making people act differently when the moment arrives. Commitment devices and external enforcers (Priority: 4/5): Using Ulysses and modern examples, Thaler describes how people enlist others or set constraints to protect themselves from their future impulses.

Key Arguments: Standard economics assumes people are fully rational, emotionless, and self-controlled, but real human behavior consistently violates that model. Mental accounting shows that money is not psychologically fungible; people assign different uses and emotional values to identical dollars. People often base work decisions on target earnings rather than marginal incentives, which can reduce labor supply on high-demand days. The source of money affects spending choices: funds perceived as 'earned' or 'found' may be spent more freely than funds tied to necessities. Self-control failures are central to major social problems such as obesity and inadequate retirement savings. Preferences are state-dependent; people in a 'cold' state underestimate how strongly they will feel temptation in a 'hot' state. Commitment strategies can help people align short-term behavior with long-term goals by creating outside enforcement.

Data Points: Behavioral economics timeline: last 15–20 years - Describing how long the field has made a splash and been controversial Behavioral economics critique window: 50 or 60 years - Thaler says economists have studied fictional rational agents for decades Cab lease duration: 12 hours - New York cab drivers rent cabs for a long shift Cab rental cost: $100 - Illustrative daily cost mentioned by cab drivers Fuel cost: $25 - Additional cost cab drivers cited for filling the tank Target above costs: $100 - Example of the earnings goal cab drivers set before quitting Lottery winnings: $86 million - Amount won by the character Alice Klieg in the film clip Lottery ticket price example: $400 - Estimated cost of two baseball tickets in Thaler’s anecdote Gift amount sent to daughter: $1,000 - Money sent so she could buy baseball tickets NIH honorarium: $200 - Payment Thaler and colleagues received for a day NIH honorarium later recalled by colleague: $300 - David Lapson’s later claim after wine was included Obesity rate: 30% of Americans - Used to illustrate the scale of self-control-related public health problems Retirement savings shortfall: Half of Americans - Thaler notes many Americans are not saving enough for retirement

Pivotal Quotes: "The truth is, I'm only willing to work on things that are fun." — Richard Thaler: Thaler responds to Daniel Kahneman’s description of him as lazy "We have very fancy models of fictional creatures. And the people I know have trouble figuring out how to divide a check if there are more than three people." — Richard Thaler: Explaining why standard economics does not fit real human behavior "Resisting temptation is work." — Richard Thaler: Summarizing why self-control failures matter in everyday life

Implications: Listeners should question assumptions of pure rationality in money, work, and self-control. For policymakers and businesses, behavioral design and commitment tools can improve outcomes where willpower and framing fail.