Blockchain-Enabled Deep-Tier Supply Chain Finance

Problem Definition: For many supply chains, deep-tier suppliers, due to their small sizes and lack of access to capital, are most vulnerable to disruptions. In this paper, we study the use of advance payment (AP) as a financing instrument in a multitier supply chain to mitigate the supply disruption risk and compare the traditional system (deep-tier financing with limited visibility) with the blockchain-enabled system (financing with perfect visibility). The main goal of this paper is to shed light on how blockchain adoption impacts agents' operational and financial decisions as well profit levels in a multitier supply chain. Academic/Practical Relevance: Traditionally, because of the limited visibility in the deep-tiers, powerful downstream manufacturers' financing schemes offered to their immediate upstream suppliers are not effective in instilling capital into the deep-tiers. Advancements in blockchain technology improve the supply chain visibility and enable the manufacturer to better devise deep-tier financing to improve supply chain resilience. Methodology: We develop a three-tier supply chain model and take a game-theoretic approach to understand a financially constrained supply chain's optimal operational and financial strategies. Results: We find that the improved supply chain visibility (by blockchain adoption) always benefits the manufacturer by enabling her to induce the desired operational risk-mitigation investment from the tier-1 and tier-2 suppliers. However, depending on the directional change in the operational risk-mitigation investment, which depends on the suppliers' initial wealth levels, the tier-1 and tier-2 suppliers can be worse-off. The "win-win-win" outcome takes place only when all operational risk-mitigation measures increase, that is, when the tier-1 supplier is severely capital constrained but the tier-2 supplier is moderately capital constrained. Comparing the two types of blockchain-enabled deep-tier financing schemes, adjacent-tier delegated financing versus cross-tier direct financing, the manufacturer strictly prefers the latter. In contrast, the tier-1 supplier strictly prefers the former because the former endows the tier-1 with financial leverage over the manufacturer. The tier-2 supplier prefers the latter only when the emergency source is expensive. Managerial Implications: Our insights help firms assess opportunities and challenges associated with enhancing supply chain visibility via blockchain adoption.