Despite empirical evidence pointing to a strong similarity between lea
se contracts and junk bonds, the theoretical modeling of equilibrium l
ease determination has been confined primarily to default-free leases.
This paper provides a unified framework for determining the equilibri
um credit spread on leases subject to default risk. The model is flexi
ble enough to he applied to a wide variety of rear-world leasing struc
tures, including security deposits, required up-front prepayments, emb
edded lease options, leases indexed to use, and lease credit insurance
contracts.