2022年05月23日
メディア掲載
宮川大介准教授が日本銀行金融研究所の客員研究員の任期中（2019年から２年間）に実施した共同研究をまとめたディスカッション・ペーパーが2本公開になりました。
・金融研究所ディスカッション・ペーパー・シリーズ（E-Series : 英語版）一覧表
伊藤洋二郎、宮川大介
【概要】
Studies on firm performance have found that exiting firms in Japan persistently show better performance than surviving firms, and this persistence adversely affects aggregate productivity. We use the panel data of business enterprises along with unique information on their exit modes (i.e., default, voluntary closure, and merger) to show that a large part of such a "negative exit effect" is attributed to the firms exiting through mergers. Further, we confirm that the causal effect of those mergers results in positive growth in the productivity of merging firms. Given that the size of such a positive causal effect overwhelms the negative exit effect, resource reallocation through mergers positively contributes to the aggregate growth in productivity for Japanese firms.
Keywords: Productivity dynamics; Exit effects; Mergers
福永健介、宮川大介
【概要】
How do supply chain networks affect credit supply? To answer this question, we empirically detect clusters of firms by using firm-to-firm transaction data, then measure banks' exposures to those clusters and borrowing firms by using bank-to-firm lending data. Through the panel estimations controlling for unobservable factors potentially affecting credit demand and supply, first, we find that the higher portfolio concentration of banks on the clusters of firms lowers credit supply to less creditworthy firms. Second, we also find that such a pattern is more apparent for banks lending to creditworthy firms. These results suggest that the change in real network propagates to credit supply through banks' risk management.
Keywords: Credit supply; supply chain network; cluster detection