C1 · Bracket-S code + Stata
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Lockup
On dark
Angle brackets evoke `</>`; the inset S anchors the mark to Stata. Pure code-tool semiotics — no characters, no chrome.
C2 · Bridge agent ↔ Stata
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Lockup
On dark
Two anchored nodes joined by an arch — the bridge tagline made literal. Reads at favicon size.
C3 · Regression statistics
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On dark
Axis, three observations, fitted line. Earnest econ/stats vibe in scikit-learn / R-package territory.
C4 · Coef-plot econometrics
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On dark
A coefficient / forest plot — instantly readable to economists, abstract to everyone else. Strongest signal to the actual user base.