We study how interactions between financing and investment decisions can shape firm boundaries in dynamic product markets. In particular, we model a new product market opportunity as a growth option and ask whether it is best exploited by a large incumbent firm (Integration) or by a separate,...

Admati, Demarzo, Hellwig, and Pfleiderer (ADHP, 2018) note that static models of optimal leverage have assumed firms have no prior debt. In this case, the leverage that maximizes firm value also maximizes value to the initial equity owners. However, using a simple two-period model with zero...