── ── Strategy

Signaling Games

One party knows something the other cannot verify. Cheap talk fails — anyone can claim high quality. A signal works when its cost differs by type: only a capable worker can bear four years of demanding study; only a quality manufacturer can afford a lifetime warranty. The signal conveys truth exactly when it would be unbearable for the wrong type…

How it works

1. Asymmetry. Who knows what the other can't verify? Be specific — not "they don't know us" but "they can't verify whether our team ships in 18 months." 2. Types. Name the hidden attribute: high-productivity vs low-productivity; going-concern vs flash-in-the-pan. 3. Adverse selection. Without a signal, the receiver prices the average — subsidizing low types, underpaying high types (Akerlof 1970). 4. Enumerate candidate signals. Credentials, brand spend, warranty, equity vesting, personal capital in round, third-party cert, public commitment, hostage/collateral. 5. Test single-crossing. Is cost meaningfully lower for the high type? If the low type can imitate at similar cost, the signal pools and conveys nothing. 6. Determine equilibrium. Separating (high sends, low doesn't), pooling (all same, no info), or hybrid. 7. Check receiver response. Does the receiver reward signal-holders enough to sustain sender investment? If not, the equilibrium unravels. 8. Watch for signal inflation. Signals erode as imitation costs fall. Plan re-investment or move up the cost ladder. 9. As receiver, decode carefully. What cost did the sender actually bear? Fake signals (imitations the low type could afford) and misread signals (family money, not investor conviction) are the main traps. 10. Stop-rule. Cost differential must be substantial and sustained — marginal differentials collapse.

When to use it

• user asks 'how do we prove we're high quality when they can't verify it', 'what credential or signal would work here', 'why is everyone spending so much on brand advertising', 'how do we tell who's the real one among these candidates', 'cheap talk isn't working — we need something credible', or describes a market where one side can't verify the other's quality/intentions/type (hiring, fundraising, B2B procurement, branding, M&A due diligence)

Worked example

Michael Spence, "Job Market Signaling," 1973

The signaling-games framework has a single founding text, written by an economist in his late twenties, that has shaped how economists, recruiters, marketers, biologists, and political scientists have thought about communication under asymmetric information for the past half-century.