Abstract
Brands increasingly operate in environments where growth depends less on isolated product claims and more on the careful orchestration of complementary meanings, capabilities, and market access. Co-branding emerges in this setting as a structured form of interfirm coordination in which two brands jointly govern a market-facing offer while preserving separate legal and strategic identities. The arrangement can enlarge demand, sharpen category narratives, and reallocate risk, yet it can also intensify dependence, dilute symbolic distinctiveness, and redistribute value in ways that neither partner fully controls. This paper develops a technical framework that treats co-branding as a multi-level system linking consumer inference, contractual design, organizational capability, and financial valuation. The analysis integrates a geometric representation of brand meaning, a demand system with compatibility and mismatch effects, a bargaining architecture for surplus division, and a dynamic law of motion for brand capital. The framework shows that co-branding performance depends not only on the absolute strength of partner brands, but also on the distance between their meaning structures, the sequencing of investments, the governance of exclusivity, and the rate at which joint commercialization consumes scarce symbolic resources. The paper further explains why an alliance that expands category demand can still produce uneven gains across partners, why short-run market enthusiasm may coexist with medium-run brand strain, and why portfolio-level governance matters more than event-level announcement quality. The resulting account positions co-branding as neither an inherently value-enhancing tactic nor a purely communicative label, but as an intertemporal allocation problem in which joint demand creation must remain compatible with the preservation of future standalone option value.
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