The Impact of Trade Credit Provision on Retail Inventory: An Empirical Investigation Using Synthetic Controls
利用法国政府限制贸易信贷期限的外生冲击，采用三重差分和合成控制法，发现贸易信贷减少导致五金零售业库存下降11%、收入下降15.5%，为贸易信贷对运营决策的因果影响提供了直接证据。
Trade credit is an important source of short-term financing and an integrated part in supply contracts. Although a number of theories have been proposed on how trade credit could improve supply chain efficiency, causal studies on the impact of trade credit on operational decisions are scarce. In this study, we examine the impact of trade credit on inventory decisions using an empirical strategy that leverages (i) an exogenous shock imparted by the French government’s intervention to impose a ceiling on trade credit duration, (ii) a triple difference-in-differences identification strategy, and (iii) synthetic controls (SCs). By considering the 60-day ceiling coverage and SC construction requirements, we identify four French retail sectors as our main sample. Among them, in the postregulation period, the hardware retail sector firms on average exhibited a significant 16% decline in trade credit usage. Correspondingly, these firms also displayed a significant 11% decline in inventory level. In the remaining three sectors, we found mixed results in the main sample. All the four sectors, however, show consistent support for a causal link between trade credit and inventory in a subsample compiled using a stringent 90-day ceiling criterion. Collectively, our findings offer direct evidence that trade credit is an indispensable financing source for inventory procurement. Finally, in the postregulation period, the hardware retailers exhibited a 15.5% decline in revenue and 3.5% reduction in gross profit. This cautions policy makers that regulations limiting the use of trade credit may have unintended consequences on downstream firms, and may harm overall supply chain efficiency. This paper was accepted by Vishal Gaur, operations management. Funding: This work was supported by Indiana University Bloomington and the London Business School. Supplemental Material: The online appendix is available at https://doi.org/10.1287/mnsc.2022.4600 .