People often agree that they will vote or buy a new product even when their later behavior says otherwise. Camerer identifies acquiescence or yes bias as a major source of error and explains why overly positive product polling can encourage companies to fund weak launches.

Hypothetical intentions can substantially exceed completed behavior
Positive and negative answers can sum to more than 100 percent
Product champions may mistake agreeable survey responses for demand
Behavioral and physiological signals may improve prediction

“this is often called acquiescence or yes bias.”
Colin Camerer · 13:03

“when you show people new products and say, you know, you think you'd be interested in this, you get way too many yes's.”
Colin Camerer · 13:29

#polling#hypothetical-bias#consumer-research#surveys

Myth Buster52:44

Good Traders Regulate Loss Aversion Rather Than Eliminate It

A meta-analysis of hundreds of estimates placed the average loss-aversion ratio around 1.7 rather than exactly two. Patients with bilateral amygdala damage showed no loss aversion, but their excessive real-life risk-taking demonstrates that fear and sensitivity to loss are protective systems, not mere defects.

Losses carry substantially more weight than equivalent gains
The estimated ratio is closer to 1.7 than a universal two
Bilateral amygdala damage can eliminate measured loss aversion
Too little fear produces dangerous risk-taking
Strong traders may combine moderate loss sensitivity with emotion regulation

“we think it's a little bit smaller like one point sabin”
Colin Camerer · 53:50

“you don't want them to be immune to loss, just like you don't want your hand to be immune to pain”
Colin Camerer · 58:35

#loss-aversion#amygdala#trading#emotion-regulation

Explainer· 4

Explainer14:16

What Each Neuroeconomic Measurement Can Reveal

Camerer distinguishes the main measurement tools used in neuroeconomics. fMRI offers whole-brain spatial coverage but is slow and unnatural, EEG captures rapid electrical activity, skin conductance detects arousal without indicating valence, and eye tracking reveals attention and pupil dilation.

fMRI measures blood-flow signals across the brain
EEG is fast enough for split-second reactions
Skin conductance detects arousal but not whether it is positive or negative
Eye tracking records attention, refixation, and pupil dilation
No single method captures every component of a decision

“the advantage of EG is it's really fast.”
Colin Camerer · 20:45

“it doesn't tell you good or bab, but it just tells you arousal.”
Colin Camerer · 22:07

#fmri#eeg#eye-tracking#neuroeconomics#biomarkers

Explainer22:15

The Brain Detects Signals Consciousness Cannot Report

A fearful face flashed for only milliseconds can activate the amygdala even when the person reports seeing nothing. Split-brain studies further show that the language-dominant hemisphere may invent a plausible explanation for behavior whose real cause it cannot access.

Much sensory processing occurs before conscious awareness
Amygdala activity can reveal an unseen fear stimulus
Conscious self-reports may omit the actual cause of behavior
The brain's interpreter can confabulate a coherent explanation

“sometimes you want to ask the brain rather than ask the person”
Colin Camerer · 22:41

“The brain knows, it's just that it doesn't get to the like the publicists desk”
Colin Camerer · 23:31

#subconscious#amygdala#split-brain#confabulation

Explainer33:05

Fear and Reward Signals Separate Bubble Sellers from Buyers

In an experimental asset market with a known fundamental value, prices commonly rose far above that value before crashing. Traders who sold before the crash showed stronger insular-cortex activity, while participants fueling the bubble showed greater activity in the reward-related nucleus accumbens.

The experiment fixed fundamental value while allowing market prices to move
Prices rose above fundamentals and later crashed
Insular activity appeared among earlier sellers
Nucleus accumbens activity was stronger among bubble buyers
The findings are proofs of concept rather than precise real-time forecasts

“we think of the insula is the early warning signal that there's going to be a crash.”
Colin Camerer · 36:14

“that's active in the people who are fueling the bubble.”
Colin Camerer · 36:31

#bubbles#trading#insula#reward#markets

Explainer59:56

Why Going Against the Crowd Feels Unnaturally Difficult

Even mild laboratory conformity produces reward-related brain activity, including among people who claim they independently resist group influence. Camerer connects this social reward to the difficulty investors face when buying during panic or declining to join a boom.

Conformity can carry intrinsic reward value
Self-reported independence does not reliably predict behavior
Social cooperation was evolutionarily valuable
Contrarian investing requires overcoming a deeply social response
Some neurodivergent traits may reduce particular conformity errors

“study after study, the study shows there's generally reward value from conformity”
Colin Camerer · 1:01:07

“part of being a social animal”
Colin Camerer · 1:01:15

#conformity#contrarian#investing#social-behavior

Story· 3

Story05:11

Why Economics Was Camerer's Intellectual Middle Ground

Camerer found physics and mathematics too detached from people, while psychology lacked the unifying mathematical structure he wanted. Economics occupied the middle ground by combining formal models with human behavior, shaping his eventual approach to decision research.

Physics offered mathematical structure but no people
Psychology studied people but seemed insufficiently unified
Economics combined human questions with quantitative models

“physics didn't have people, psychology didn't have math.”
Colin Camerer · 05:42

“Economics was kind of the right mix.”
Colin Camerer · 05:47

#economics#psychology#career#decision-making

Story47:23

A Hormone Made Socially Risky Cooperation More Likely

Camerer's team administered arginine vasopressin or a placebo before participants played a Stag Hunt coordination game. The hormone increased selection of the socially risky cooperative option, while imaging associated those choices with activity in the globus pallidus.

Stag hunting pays more only when both players cooperate
Rabbit hunting offers a smaller safe individual payoff
The crossover design controlled for placebo effects
AVP increased cooperative Stag choices
The intervention supplied causal evidence rather than correlation alone

“When you give them a VP, they're more likely to choose STAG”
Colin Camerer · 48:46

“it makes them want to cooperate in a way that with this risky it benefits the group.”
Colin Camerer · 50:04

#cooperation#vasopressin#game-theory#hormones

Story40:38

How Evidence Overcame Hostility to Behavioral Finance

Behavioral economics initially faced strong objections that markets, learning, and arbitrage should eliminate systematic mistakes. Camerer argues that accumulated anomalies and evidence involving both ordinary and sophisticated investors eventually shifted the discipline despite persistent ideological resistance.

Early behavioral researchers faced career warnings and hostility
Critics expected arbitrage or learning to remove mistakes
Market anomalies accumulated across many settings
Evidence involving sophisticated investors weakened the easy rebuttals
Teaching younger generations accelerated acceptance

“data do win arguments”
Colin Camerer · 41:48

“eventually data went arguments, and there were you know, there were just so many anomalies and ways in which investors were making mistakes.”
Colin Camerer · 42:02

#behavioral-finance#market-efficiency#evidence#economics

Takeaway· 2

Takeaway28:01

Real Shoppers Look Back at the Price

Eye tracking only modestly improves individual purchase prediction, but the commercial value of a small lift can still be substantial at scale. Serious buyers spend more time on price and repeatedly shift their gaze between price and product.

Hypothetical buyers pay less visual attention to price
Refixation means repeatedly looking back and forth
Eye tracking can produce a modest predictive lift
Small statistical improvements may be commercially valuable

“the two taels are basically looking at the price, and the other is refixation”
Colin Camerer · 29:08

“the repeated looking.”
Colin Camerer · 29:26

#eye-tracking#shopping#pricing#prediction

Takeaway1:03:31

Charlie Munger's Edge Was Avoiding Stupid Mistakes

Camerer and Ritholtz discuss Munger's ability to avoid social conformity, remain within his circle of competence, and reduce unforced errors. The emphasis is not on extraordinary prediction but on metacognition and consistently declining decisions one does not understand.

Avoiding errors can matter more than displaying brilliance
A circle of competence prevents poorly understood investments
Reduced conformity may support independent judgment
Metacognition helps investors recognize the limits of their knowledge

“he may have not made them because he doesn't get caught up in social conformity”
Colin Camerer · 1:04:41

“it's not that we're smarter than everybody else, we were just less stupid”
Barry Ritholtz · 1:05:18

#charlie-munger#investing#metacognition#decision-making

Frameworks in this episode

Dynamic Adaptive Questioning

Evolutionary Mismatch and Cognitive Exoskeleton

Incentive-Compatible Preference Elicitation

Lollapalooza Intervention Stack

Resource Rationality Constraint Test

Insights & moments

⚡Myth Buster· 2

Why Survey Yeses Overstate Voting and Buying