Understanding the rise and decline of the Japanese main bank system : The changing effects of bank rent extraction

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

21 Scopus Citations
View graph of relations

Related Research Unit(s)


Original languageEnglish
Pages (from-to)36-50
Journal / PublicationJournal of Banking and Finance
Issue number1
Publication statusPublished - Jan 2012


This paper shows how main bank rent extraction affects corporate decisions about investment and financing during financial regulatory reform. Our model predicts that limited loanable funds can initially contain main bank controlled overinvestment, even when new equity is available to the firm. Abundant funds facilitate overinvestment to the detriment of firm profitability. A shift of control rights back to the firm due to financial deregulation produces an "equity for upside potential and bank debt for downside risk" bias against the banks. A stock market and real estate boom in Japan made it harder than ever for the banks to diversify risk. The insights from this analysis help explain why Japan's main bank system was beneficial in the (capital constrained) postwar period but became harmful during the (capital abundant and even bubbly) 1980s, and why the adverse shocks of the post-deregulation 1990s had such severe effects on the banking system. © 2011 Elsevier B.V.

Research Area(s)

  • Bank risk, Financial deregulation, Investment efficiency, Main bank, Rent extraction