Revenue Recognition We commence revenue recognition on our leases based on a number of factors. In most cases, revenue recognition under a lease begins when the lessee takes possession of or controls the physical use of the leased asset. Generally, this occurs on the lease commencement date. The determination of who is the owner, for accounting purposes, of the tenant improvements determines the nature of the leased asset and when revenue recognition under a lease begins. If we are the owner, for accounting purposes, of the tenant improvements, then the leased asset is the finished space, and revenue recognition begins when the lessee takes possession of the finished space, typically when the improvements are substantially complete. If we conclude that we are not the owner, for accounting purposes, of the tenant improvements (the lessee is the owner), then the leased asset is the unimproved space and any tenant improvement allowances funded under the lease are treated as lease incentives, which reduce revenue recognized over the term of the lease. In these circumstances, we begin revenue recognition when the lessee takes possession of the unimproved space to construct their own improvements. We consider a number of different factors in evaluating whether we or the lessee is the owner of the tenant improvements for accounting purposes. These factors include:  whether the lease stipulates how and on what a tenant improvement allowance may be spent;  whether the tenant or landlord retains legal title to the improvements;  the uniqueness of the improvements;  the expected economic life of the tenant improvements relative to the length of the lease; and  who constructs or directs the construction of the improvements. We recognize rental income on a straight-line basis over the term of each lease. The difference between rental income earned on a straight-line basis and the cash rent due under the provisions of the lease agreements is recorded as deferred rent receivable and is included as a component of other ass