Kulatilaka, N. and Perotti, E. (1995). What is lost by waiting to invest The Journal of Finance, 50(3):990--991.
Berglof, E. and Perotti, E. (1994). The governance structure of the Japanese financial keiretsu Journal of Financial Economics, 36(2):259--284.
Perotti, E. and Spier, K. (1993). Capital structure as a bargaining tool : the role of leverage in contract renegotiation American Economic Review, 83(5):1131--1141.