r/DecisionTheory
3k members
r/DecisionTheory is a subreddit with 3k members. The most common kinds of discussions are news and advice requests, and the community frequently discusses decision, decision making, bayesian, optimization, and theory.
Statistical decision theory and utility theory.
Popular Themes in r/DecisionTheory
#1
News
: ""Pricing the Future in the Seventeenth Century: Calculating Technologies in Competition", Deringer 2017"
14 posts
#2
Advice Requests
: "New to decision theory. Where should I start?"
7 posts
#3
Solution Requests
: "Beta testers for Decision Matrix software needed"
2 posts
#4
Ideas
: "A mathematician’s trick completely changed how I make decisions — might help you too"
2 posts
#5
Pain & Anger
: ""Jeep problem", Wikipedia (older desert-related variants on the rocket equation)"
1 post
#6
Money Talk
: ""The cost of information acquisition by natural selection", McGee et al 2022"
1 post
Popular Topics in r/DecisionTheory
#1
Decision
: ""The geometry of Decision-making in individuals and collectives", Sridhar et al 2021 (choosing by repeated binary choices)"
34 posts
#2
Decision Making
: ""Decision Making Under Uncertainty with POMDPs.jl: How to build and solve Decision Making problems using the POMDPs.jl ecosystem of packages" (Julia Academy online course)"
16 posts
#3
Bayesian
: "Pure Bayesianism vs Newcomb's Paradox"
10 posts
#4
Optimization
: ""Introduction to Linear Programming in Python: Mathematical Optimization with Google OR-Tools""
10 posts
#5
Theory
: "From Theory to practice"
7 posts
#6
Probability
: "What is the state of the art of eliciting Probability distributions and utility functions?"
6 posts
#7
Forecasting
: ""Reciprocal Scoring: A Method for Forecasting Unanswerable Questions", Karger et al 2021 (Good Judgment Project variant on Keynesian beauty contest/Bayesian truth serum)"
6 posts
#8
Decision Making
6 posts
#9
Machine Learning
: ""How a Feel-Good AI Story Went Wrong in Flint: A machine-learning model showed promising results, but city officials and their engineering contractor abandoned it." [lead pipe testing as sequential search problem]"
5 posts
#10
Learning
: "MEMORIZE: a randomized review algorithm derived using principles from control theory ["Enhancing human Learning via spaced repetition optimization", Tabibian et al 2019]"
5 posts
Flair Used in r/DecisionTheory
#1
Psych, Paper
: ""Relationship foraging: Does time spent searching predict relationship length?", Cohen & Todd 2018"
13 posts
#2
Econ
: ""Fat tails discourage compromise""
10 posts
#3
Soft
: ""Introduction to Linear Programming in Python: Mathematical optimization with Google OR-Tools""
8 posts
#4
Phi
: ""Decisions are not about changing the world, they are about learning what world you live in""
7 posts
#5
Psych, RL, Paper
: ""Optimal policy for multi-alternative decisions", Tajima et al 2019"
6 posts
#6
Psych, Econ, Paper
: ""Decisions under Risk Are Decisions under Complexity", Oprea 2024 (behavioral economics biases might be because people are dumb, not irrational)"
5 posts
#7
Econ, Psych, Paper
: ""Behavioral Implications of Causal Misperceptions", Spiegler 2020"
4 posts
#8
Bayes, Econ, Paper
: ""Robust Decision Theory and Econometrics", Chamberlain 2020"
3 posts
#9
Econ, RL, Psych, Paper
: ""Ergodicity-breaking reveals time optimal economic behavior in humans", Meder et al 2019"
3 posts
#10
Bayes, Psych, Paper
: ""In contrast to less-is-more claims, ignoring information is rarely, if ever optimal" [heuristics & improper models may derive superiority from being crude ways to encode informative priors]"
3 posts
Member Growth in r/DecisionTheory
Yearly
+350 members(11.6%)
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Last updated: August 9, 2026