All judgments are relative. “Good,” “bad,” “better,” “improved,” “created value” — none of these exist in isolation. They only exist compared to something else.
That something else is the baseline. And the baseline is usually invisible.
There is no absolute "good" — only "better than the alternative"
Whoever picks the alternative controls the conclusion
How This Idea Emerged
Starting point: Studying GDP and asking “why do we care if GDP goes up?”
The chain:
- GDP measures production → but more production isn’t automatically good
- Building houses raises GDP → but what if nobody needs them?
- Oil spill cleanup raises GDP → but we’re just fixing damage
- “At least we created jobs” → compared to what?
The unlock: The Broken Window Fallacy assumes workers would have had other jobs. But what if they wouldn’t? Then the baseline shifts — and so does the conclusion.
The generalization: This pattern appears everywhere. CPI base years, “improvement” metrics, policy evaluations. Every claim contains a hidden comparison.
The Core Principle
| Component | Description |
|---|---|
| Claim | ”This is good” / “This worked” / “This created value” |
| Hidden structure | ”This is better than [baseline]“ |
| The baseline | The alternative being compared against — often unstated |
| The lever | Change the baseline → change whether the claim is true |
Every evaluation is a comparison
The comparison has a baseline The baseline is often invisible Change the baseline, change the conclusion
The Broken Window Fallacy — A Case Study
Scenario: A kid breaks a shopkeeper’s window.
The claim: “At least it creates work for the glazier!”
| Framing | Baseline | Conclusion |
|---|---|---|
| ”Glazier gets paid” | vs. nothing | Good — jobs created! |
| ”Glazier gets paid” | vs. shoemaker getting paid | Neutral — just redirected spending |
| ”Glazier gets paid” | vs. new shoes + intact window | Bad — net loss of value |
What’s actually true?
| Economic Condition | Relevant Baseline | Conclusion |
|---|---|---|
| Mass unemployment | Workers would have been idle | Breaking window = some stimulus |
| Full employment | Workers would have been productive elsewhere | Breaking window = waste |
The fallacy isn't always a fallacy
It depends on which baseline matches reality
Full employment → fallacy holds (opportunity cost is real)
Mass unemployment → your objection holds (opportunity cost is zero)
The Pattern Across Domains
| Domain | What Has a Baseline | How Baseline Changes Conclusion |
|---|---|---|
| Broken Window | ”Created jobs” compared to what? | vs. nothing → good; vs. other jobs → neutral |
| CPI | Price change since when? | Pick 2019 vs. 2021 → different inflation narrative |
| GDP Deflator | ”Real” growth relative to what base year? | Different base → different growth rate |
| Output Gap | Y* (potential GDP) | Different model → different gap → different policy |
| Performance Review | ”Improved” since when? | Pick a bad quarter → everything looks good |
| Policy Evaluation | ”This policy worked” | vs. doing nothing? vs. a better policy? |
| Investment Returns | ”Beat the market” | Which market? Which time period? |
GDP Is a Gauge, Not a Goal
This baseline problem is why GDP growth isn’t automatically good.
| What GDP Measures | What People Think It Means |
|---|---|
| Total market production | ”How well we’re doing” |
| Economic activity | Progress |
| Stuff made and sold | Quality of life |
The hidden baseline: “More GDP is good” assumes the alternative was less GDP with everything else equal.
But what if:
| Scenario | GDP | Actual Outcome |
|---|---|---|
| Car accident → hospital bills, repairs | ↑ | Nobody better off |
| Oil spill → cleanup crews | ↑ | Just fixing damage |
| Work 80 hrs instead of 40 | ↑ | Burnout, lost family time |
| Cut down forest → sell lumber | ↑ | Lost ecosystem, recreation |
GDP counts activity, not whether activity made life better
“GDP went up” is meaningless without asking: compared to what alternative?
Goodhart’s Law connection:
“When a measure becomes a target, it ceases to be a good measure.”
| Stage | What Happens |
|---|---|
| 1 | GDP created as a gauge (useful) |
| 2 | GDP becomes a goal (“grow GDP!“) |
| 3 | Optimization begins (maximize the number) |
| 4 | Gauge breaks (GDP rises, life doesn’t improve) |
Detecting Hidden Baselines with the Seven Lenses
The Seven Lenses for Decomposing Claims are partly tools for surfacing hidden baselines:
| Lens | The Question | How It Exposes Baselines |
|---|---|---|
| Conditions | ”What if [condition] changed?” | Tests whether conclusion holds under a different baseline |
| Trade-offs | ”What’s the cost? What’s sacrificed?” | Names the foregone alternative — the baseline you’re NOT choosing |
| Scope | ”Why ‘all’? Why ‘always’?” | Challenges whether one baseline works universally |
| Actors | ”Who decides? Who benefits?” | Asks who CHOSE this baseline — and who benefits from that choice |
Example — Broken Window through the lenses:
Claim: “Breaking windows creates jobs.”
| Lens | Question | What It Reveals |
|---|---|---|
| Conditions | What if full employment vs. recession? | Baseline shifts → conclusion shifts |
| Trade-offs | What job is NOT created? | Hidden baseline: productive alternative |
| Scope | Is this always true? | Baseline isn’t universal |
| Actors | Who benefits from this framing? | Someone chose this baseline |
The Defense
When evaluating any claim:
| Question | What It Does |
|---|---|
| ”Compared to what?” | Makes the baseline explicit |
| ”Who chose this baseline?” | Reveals potential agenda |
| ”What if we used a different baseline?” | Tests robustness |
| ”Is this baseline disclosed?” | Checks intellectual honesty |
Common Traps
| Trap | Example | The Problem |
|---|---|---|
| Floor thinking only | ”At least we got something” | Ignores better alternatives |
| Ceiling thinking only | ”We could have done better” | Ignores that worse was possible |
| Shifting baselines | Different baseline for praise vs. criticism | Inconsistent reasoning |
| Hidden baselines | ”This policy worked” | Worked compared to what? |
| Baseline as given | ”CPI says inflation is 3%“ | Forgetting the base year is a choice |
The Practical Takeaway
When someone presents a conclusion, find the baseline
- If the baseline is hidden → ask for it
- If the baseline seems wrong → propose a different one
- If the baseline is cherry-picked → call it out
- If you’re making a claim → disclose your baseline
North: Where this comes from
- ECON-1221 Chapter 5 - Notes from the Textbook (GDP as gauge vs. goal)
- ECON-1221 Chapter 4 - Notes from the Textbook (CPI, base years, real vs. nominal)
- The Broken Window Fallacy (Bastiat, “what is seen and unseen”)
East: What opposes this?
- Absolute Thinking (believing things are good/bad independent of comparison)
- Taking Metrics at Face Value (trusting numbers without examining methodology)
South: Where this leads
- Methodology as Power
- Statistical Literacy (reading numbers critically)
- Framing Effects (how presentation shapes perception)
West: What’s similar?
- Seven Lenses for Decomposing Claims (tools for surfacing hidden assumptions)
- Opportunity Cost (value of the foregone alternative)
- Goodhart’s Law (when measures become targets)
- The Map Is Not the Territory (representations ≠ reality)