The preparation of the consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates include: (i) the underlying cash flows and anticipated holding periods used in assessing impairment; (ii) the determination of useful lives for tangible and intangible assets; and (iii) the assessment of the collectability of receivables, including deferred rent receivables. Longer anticipated holding periods for real estate assets directly reduce the likelihood of recording an impairment loss. If there is a change in the strategy for an asset or if market conditions dictate an earlier sale date, an impairment loss may be recognized, and such loss could be material.

In March 2020, the World Health Organization declared a global pandemic related to the novel coronavirus ("COVID-19"). The significance, extent and duration of the impact of COVID-19 on us and our tenants remains largely uncertain and dependent on near-term and future developments that cannot be accurately predicted at this time, such as the continued severity, duration, transmission rate and geographic spread of COVID-19, the distribution, effectiveness and willingness of people to take COVID-19 vaccines, the extent and effectiveness of the containment measures taken, and the response of the overall economy, the financial markets and the population, particularly in the area in which we operate. The ultimate adverse impact of COVID-19 is highly uncertain; however, the effects of COVID-19 on us and our tenants have affected estimates used in the preparation of the underlying cash flows used in assessing our long-lived assets for impairment and the assessment of the collectability of receivables from tenants, including deferred rent receivables. We have made what we believe to be appropriate accounting estimates based on the facts and circumstances available as of the reporting date. To the extent these estimates differ from actual results, our consolidated financial statements may be materially affected.

During the years ended December 31, 2021 and 2020, we recorded $1.1 million and $11.2 million of credit losses against billed rent receivables, and $19.6 million against deferred (straight-line) rent receivables during the year ended December 31, 2020. These losses were due to the effects of COVID-19, primarily from co-working and retail tenants, that were unable to pay rent while businesses were closed, not operating at full capacity or while employees continue to work from home. During 2020, we began recognizing revenue from substantially all co-working tenants and retailers except for grocers, pharmacies, essential businesses and certain national credit tenants on the cash basis of accounting. We provided rent deferrals that had been contractually due during 2020 and 2021 totaling $10.1 million, of which $4.0 million was subsequently abated and $1.2 million was collected. During 2021, revenue for the majority of these tenants continued to be recognized on the cash basis of accounting. While we have seen some improvement in performance and cash collections, our retailers and co-working tenants are still experiencing some impact from the effects of COVID-19 and may continue to experience such impact. During the fourth quarter of 2021, we received $4.5 million of business interruption insurance proceeds for COVID-19 related losses, which were included in "Interest and other income (loss), net" in our consolidated statement of operations.

We account for asset acquisitions at cost, which includes the consolidation of previously unconsolidated real estate ventures, including transaction costs, plus the fair value of any assumed debt. We estimate the fair values of acquired tangible assets (consisting of real estate, tenant and other receivables, and other assets, as applicable), identified intangible assets and liabilities (consisting of in-place leases, above- and below-market leases, options to enter into ground leases and management contracts, as applicable), assumed debt and other liabilities, and noncontrolling interests, as applicable, based on our evaluation of information and estimates available at the date of acquisition. Based on these estimates, we allocate the purchase price, including all transaction costs related to the acquisition and any contingent consideration, to

the identified assets acquired and liabilities assumed based on their relative fair value. The results of operations of acquisitions are prospectively included in our consolidated financial statements beginning with the date of the acquisition.

The fair values of buildings are determined using the "as-if vacant" approach whereby we use discounted cash flow models with inputs and assumptions that we believe are consistent with current market conditions for similar assets. The most significant assumptions in determining the allocation of the purchase price to buildings are the exit capitalization rate, discount rate, estimated market rents and hypothetical expected lease-up periods. We assess the fair value of land based on market comparisons and development projects using an income approach of cost plus a margin.

The fair values of identified intangible assets are determined based on the following:

Real Estate

Real estate is carried at cost, net of accumulated depreciation and amortization. Maintenance and repairs are expensed as incurred and are included in "Property operating expenses" in our consolidated statements of operations. As real estate is undergoing redevelopment activities, all property operating expenses directly associated with and attributable to the redevelopment, including interest expense, are capitalized to the extent that we believe such costs are recoverable through the value of the property. The capitalization period ends when the asset is ready for its intended use, but no later than one year from substantial completion of major construction activities. General and administrative costs are expensed as incurred. Depreciation and amortization require an estimate of the useful life of each property and improvement as well as an allocation of the costs associated with a property to its various components. Depreciation and amortization are recognized on a straight-line basis over estimated useful lives, which range from three to 40 years. Tenant improvements are amortized on a straight-line basis over the lives of the related leases, which approximate the useful lives of the tenant improvements. When assets are sold or retired, their costs and related accumulated depreciation are removed from the accounts with the resulting gains or losses reflected in net income (loss) for the period.

Construction in progress, including land, is carried at cost, and no depreciation is recorded. Real estate undergoing significant renovations and improvements is considered to be under development. All direct and indirect costs related to development activities are capitalized into "Construction in progress, including land" in our consolidated balance sheets, except for certain demolition costs, which are expensed as incurred. Direct development costs incurred include: pre-development expenditures directly related to a specific project, development and construction costs, interest, insurance and real estate taxes. Indirect development costs include: employee salaries and benefits, travel and other related costs that are directly associated with the development. Our method of calculating capitalized interest expense is based upon applying our weighted average borrowing rate to the actual accumulated expenditures if the property does not have property specific debt. If the property is encumbered by specific debt, we will capitalize both the interest incurred applicable to that debt and additional interest expense using our weighted average borrowing rate for any accumulated expenditures in excess of the principal balance of the debt encumbering the property. The capitalization of such expenses ceases when the real estate is ready for its intended use, but no later than one-year from substantial completion of major construction activities.

Our real estate and related intangible assets are reviewed for impairment whenever there are changes in circumstances or indicators that the carrying amount of the assets may not be recoverable. These indicators may include operating performance, shortened anticipated holding periods, costs in excess of budgets for under-construction assets and adverse changes in circumstances. An impairment exists when the carrying amount of an asset exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset. Estimates of future cash flows are based on our current plans, anticipated holding periods and available market information at the time the analyses are prepared. An impairment loss is recognized if the carrying amount of the asset is not recoverable and is measured based on the excess of the property's carrying amount over its estimated fair value. Estimated fair values are calculated based on the following information in order of preference, dependent upon availability: (i) pending or executed agreements, (ii) market prices for comparable properties or (iii) the sum of discounted cash flows.

If our estimates of future cash flows, anticipated holding periods, or fair values change, based on market conditions, anticipated selling prices or other factors, our evaluation of impairment losses may be different and such differences could be material to our consolidated financial statements. Estimates of future cash flows are subjective and are based, in part, on assumptions regarding future occupancy, rental rates and capital requirements that could differ materially from actual results.

Cash and Cash Equivalents

Cash and cash equivalents consist of highly liquid investments with a purchase date life to maturity of three months or less and are carried at cost, which approximates fair value due to their short-term maturities.

Restricted Cash

Restricted cash consists primarily of proceeds from property dispositions held in escrow, security deposits held on behalf of our tenants and cash escrowed under loan agreements for debt service, real estate taxes, property insurance and capital improvements.

Investments in Real Estate Ventures

We analyze each real estate venture to determine whether the entity should be consolidated. If it is determined that an entity is a VIE in which we have a variable interest, we assess whether we are the primary beneficiary of the VIE to determine whether it should be consolidated. We are not the primary beneficiary of a VIE when we do not have voting control, lack the power to direct the activities that most significantly impact the entity's economic performance, or the limited partners (or non-managing members) have substantive participatory rights. If it is determined that the entity is not a VIE, then the determination as to whether we consolidate is based on whether we have a controlling financial interest in the entity, which is based on our voting interests and the degree of influence we have over the entity. Management uses judgment when determining if we are the primary beneficiary of or have a controlling financial interest in a VIE. Factors considered in determining whether we have the power to direct the activities that most significantly impact the entity's economic performance include voting rights, involvement in day-to-day capital and operating decisions, and the extent of our involvement in the entity.

We use the equity method of accounting for investments in unconsolidated real estate ventures when we have significant influence, but do not have a controlling financial interest. Significant influence is typically indicated through ownership of 20% or more of the voting interests. Under the equity method, we record our investments in these entities in "Investments in unconsolidated real estate ventures" in our consolidated balance sheets, and our proportionate share of earnings or losses earned by the real estate venture is recognized in "Loss from unconsolidated real estate ventures, net" in the accompanying consolidated statements of operations. We earn revenue from the management services we provide to unconsolidated real estate ventures. These fees are determined in accordance with the terms specific to each arrangement and may include property and asset management fees, or transactional fees for leasing, acquisition, development and construction, financing and legal services provided. We account for this revenue gross of our ownership interest in each respective real estate venture and recognize such revenue in "Third-party real estate services, including reimbursements" in our consolidated statements of operations when earned. Our proportionate share of related expenses is recognized in "Loss from unconsolidated real estate ventures, net" in our consolidated statements of operations.

We may also earn incremental promote distributions if certain financial return benchmarks are achieved upon ultimate disposition of the underlying properties. Promote revenue is recognized when certain earnings events have occurred, and the amount of revenue is determinable and collectible. Any promote revenue is reflected in "Loss from unconsolidated real estate ventures, net" in our consolidated statements of operations.

With regard to distributions from unconsolidated real estate ventures, we use the information that is available to us to determine the nature of the underlying activity that generated the distributions. Using the nature of distribution approach, cash flows generated from the operations of an unconsolidated real estate venture are classified as a return on investment (cash inflow from operating activities) and cash flows from property sales, debt refinancing or sales of our investments are classified as a return of investment (cash inflow from investing activities).

On a periodic basis, we evaluate our investments in unconsolidated real estate ventures for impairment. An investment in a real estate venture is considered impaired if we determine that its fair value is less than the net carrying value of the investment in that real estate venture on an other-than-temporary basis. Cash flow projections for the investments consider property level factors such as expected future operating income, trends and prospects, anticipated holding periods, as well as the effects of demand, competition and other factors. We consider various qualitative factors to determine if a decrease in the value of our investment is other-than-temporary. These factors include the age of the venture, our intent and ability to retain our investment in the entity, financial condition and long-term prospects of the entity and relationships with our partners and banks. If we believe that the decline in the fair value of the investment is temporary, no impairment loss is recorded. If our analysis indicates that there is an other-than temporary impairment related to the investment in a particular real estate venture, the carrying value of the venture will be adjusted to an amount that reflects the estimated fair value of the investment.

Intangibles

Intangible assets consist of: (i) in-place leases, below-market ground rent obligations, above-market real estate leases and options to enter into ground leases that were recorded in connection with the acquisition of properties and (ii) management and leasing contracts acquired in the Combination. Intangible liabilities consist of above-market ground rent obligations and below-market real estate leases that are also recorded in connection with the acquisition of properties. Both intangible assets and liabilities are amortized and accreted using the straight-line method over their applicable remaining useful life. When a lease or contract is terminated early, any remaining unamortized or unaccreted balances are charged to earnings. The useful lives of intangible assets are evaluated each reporting period with any changes in estimated useful lives being accounted for over the revised remaining useful life.

Intangible assets also include the wireless spectrum licenses we acquired. While the licenses are issued for ten years, as long as we act within the requirements and constraints of the regulatory authorities, the renewal and extension of these licenses is reasonably certain at minimal cost. Accordingly, we have concluded that the licenses are indefinite-lived intangible assets.

Investments

Investments in equity securities without readily determinable fair values are carried at cost. Investments in investment funds without readily determinable fair values that qualify for the net asset value ("NAV") practical expedient are carried at fair value based on their reported NAV. Investments in equity securities and investment funds are included in "Other assets" in our consolidated balance sheets. Realized and unrealized gains and losses are included in “Interest and other income (loss), net” in our consolidated statements of operations.

Assets Held for Sale

Assets, primarily consisting of real estate, are classified as held for sale when all the necessary criteria are met. The criteria include: (i) management, having the authority to approve action, commits to a plan to sell the property in its present condition, (ii) the sale of the property is at a price reasonable in relation to its current fair value and (iii) the sale is probable and expected to be completed within one year. Real estate held for sale is carried at the lower of carrying amounts or

estimated fair value less disposal costs. Depreciation and amortization is not recognized on real estate classified as held for sale.

Deferred Costs

Deferred financing costs consist of loan issuance costs directly related to financing transactions that are deferred and amortized over the term of the related loan as a component of interest expense. Unamortized deferred financing costs related to our mortgages payable and unsecured term loans are presented as a direct deduction from the carrying amounts of the related debt instruments, while such costs related to our revolving credit facility are included in other assets.

Noncontrolling Interests

We identify our noncontrolling interests separately in our consolidated balance sheets. Amounts of consolidated net income (loss) attributable to redeemable noncontrolling interests and to the noncontrolling interests in consolidated subsidiaries are presented separately in our consolidated statements of operations.

Redeemable Noncontrolling Interests - Redeemable noncontrolling interests consists of OP Units issued in conjunction with the Formation Transaction, LTIP Units issued to employees and our venture partners' interests in The Wren. Redeemable noncontrolling interests are generally redeemable at the option of the holder for our common shares, or cash at our election, subject to certain limitations, and are presented in the mezzanine section between total liabilities and shareholders' equity in our consolidated balance sheets. The carrying amount of redeemable noncontrolling interests is adjusted to its redemption value at the end of each reporting period, but no less than its initial carrying value, with such adjustments recognized in "Additional paid-in capital." See Note 11 for additional information.

Noncontrolling Interests - Noncontrolling interests represents the portion of equity that we do not own in entities we consolidate, including interests in consolidated real estate ventures.

Derivative Financial Instruments and Hedge Accounting

Derivative financial instruments are used at times to manage exposure to variable interest rate risk. Derivative financial instruments are recognized as either assets or liabilities and are measured at fair value. The accounting for changes in the fair value of a derivative depends on the intended use of the derivative and the resulting designation.

Derivative Financial Instruments Designated as Cash Flow Hedges - Certain derivative financial instruments, consisting of interest rate swap and cap agreements, are designated as cash flow hedges, and are carried at their estimated fair value on a recurring basis. We assess the effectiveness of our cash flow hedges both at inception and on an ongoing basis. If the hedges are deemed to be effective, the fair value is recorded in accumulated other comprehensive income (loss) and is subsequently reclassified into "Interest expense" in the period that the hedged forecasted transactions affect earnings. Our cash flow hedges become less than perfectly effective if the critical terms of the hedging instrument and the forecasted transactions do not perfectly match such as notional amounts, settlement dates, reset dates, calculation period and interest rates. In addition, we evaluate the default risk of the counterparty by monitoring the creditworthiness of the counterparty.

Derivative instruments and hedging activities require management to make judgments on the nature of its derivatives and their effectiveness as hedges. These judgments determine if the changes in fair value of the derivative instruments are reported in our consolidated statements of operations, or in our consolidated statements of comprehensive income (loss).

Derivative Financial Instruments Not Designated as Accounting Hedges - Certain derivative financial instruments, consisting of interest rate swap and cap agreements, are considered cash flow hedges, but are not designated as accounting hedges, and are carried at their estimated fair value on a recurring basis. Realized and unrealized gains are recorded in "Interest expense" in our consolidated statements of operations in the period in which the change occurs.

Fair Value of Assets and Liabilities

Accounting Standards Codification ("ASC") 820 ("Topic 820"), Fair Value Measurement and Disclosures, defines fair value and establishes a framework for measuring fair value. The objective of fair value is to determine the price that would be received upon the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price). Topic 820 establishes a fair value hierarchy that prioritizes observable and unobservable inputs used to measure fair value into three levels:

Level 1 — quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities;

Level 2 — observable prices that are based on inputs not quoted in active markets, but corroborated by market data; and

Level 3 — unobservable inputs that are used when little or no market data is available.

The fair value hierarchy gives the highest priority to Level 1 inputs and the lowest priority to Level 3 inputs. In determining fair value, we utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as consider counterparty credit risk in our assessment of fair value. Investments that are valued using NAV as a practical expedient are excluded from the fair value hierarchy disclosures.

Revenue Recognition

We have leases with various tenants across our portfolio of properties, which generate rental income and operating cash flows for our benefit. Through these leases, we provide tenants with the right to control the use of our real estate, which tenants agree to use and control. The right to control our real estate conveys to our tenants substantially all of the economic benefits and the right to direct how and for what purpose the real estate is used throughout the period of use, thereby meeting the definition of a lease. Leases will be classified as either operating, sales-type or direct finance leases based on whether the lease is structured in effect as a financed purchase.

Property rental revenue includes base rent each tenant pays in accordance with the terms of its respective lease and is reported on a straight-line basis over the non-cancellable term of the lease, which includes the effects of periodic step-ups in rent and rent abatements under the lease. When a renewal option is included within the lease, we assess whether the option is reasonably certain of being exercised against relevant economic factors to determine whether the option period should be included as part of the lease term. Further, property rental revenue includes tenant reimbursement revenue from the recovery of all or a portion of the operating expenses and real estate taxes of the respective assets. Tenant reimbursements, which vary each period, are non-lease components that are not the predominant activity within the contract. We have elected the practical expedient that allows us to combine certain lease and non-lease components of our operating leases. Non-lease components are recognized together with fixed base rent in "Property rental revenue", as variable lease income in the same periods as the related expenses are incurred. Certain commercial leases may also provide for the payment by the lessee of additional rents based on a percentage of sales, which are recorded as variable lease income in the period the additional rents are earned.

We commence rental revenue recognition when the tenant takes possession of the leased space or controls the physical use of the leased space and when the leased space is substantially ready for its intended use. In circumstances where we provide a tenant improvement allowance for improvements that are owned by the tenant, we recognize the allowance as a reduction of property rental revenue on a straight-line basis over the term of the lease commencing when the tenant takes possession of the space. Differences between rental revenue recognized and amounts due under the respective lease agreements are recorded as an increase or decrease to "Deferred rent receivable, net" in our consolidated balance sheets. Property rental revenue also includes the amortization or accretion of acquired above-and below-market leases. We periodically evaluate the collectability of amounts due from tenants and recognize an adjustment to property rental revenue for accounts receivable and deferred rent receivable if we conclude it is not probable we will collect the remaining lease payments under the lease agreements. Any changes to the provision for lease revenue determined to be not probable of collection are included in "Property rental revenue" in our consolidated statements of operations. We exercise judgment in assessing the probability of collection and consider payment history and current credit status in making this determination.

Third-party real estate services revenue, including reimbursements, includes property and asset management fees, and transactional fees for leasing, acquisition, development and construction, financing, and legal services. These fees are determined in accordance with the terms specific to each arrangement and are recognized as the related services are performed. Development fees are earned from providing services to third-party property owners and our unconsolidated real estate ventures. The performance obligations associated with our development services contracts are satisfied over time and we recognize our development fee revenue using a time-based measure of progress over the course of the development project due to the stand-ready nature of the promised services. The transaction prices for our performance obligations that are expected to be completed in greater than twelve months are variable based on the costs ultimately incurred to develop the underlying assets. Judgments impacting the timing and amount of revenue recognized from our development services contracts include the determination of the nature and number of performance obligations within a contract, estimates of total development project costs, from which the fees are typically derived, and estimates of the period of time over which the development services are expected to be performed, which is the period over which the revenue is recognized. We recognize development fees earned from unconsolidated real estate venture projects to the extent of our venture partners' ownership interest.

Third-Party Real Estate Services Expenses

Third-party real estate services expenses include the costs associated with the management services provided to our unconsolidated real estate ventures and other third parties, including amounts paid to third-party contractors for construction projects that we manage. We allocate personnel and other overhead costs using estimates of the time spent performing services for our third-party real estate services and other allocation methodologies.

Lessee Accounting

We are obligated under non-cancellable operating and finance leases, including ground leases on certain of our properties with terms extending through the year 2118. When a renewal option is included within a lease, we assess whether the option is reasonably certain of being exercised against relevant economic factors to determine whether the option period should be included as part of the lease term. Lease payments associated with renewal periods that we are reasonably certain will be exercised are included in the measurement of the corresponding lease liability and right-of-use asset. Lease expense for our operating leases is recognized on a straight-line basis over the expected lease term and is included in our consolidated statements of operations in "Property operating expenses." Amortization of the right-of-use asset associated with a finance lease is recognized on a straight-line basis over the expected lease term and is included in our consolidated statements of operations in "Depreciation and amortization expense" with the related interest on our outstanding lease liability included in "Interest expense."

Certain lease agreements include variable lease payments that, in the future, will vary based on changes in inflationary measures, market rates or our share of expenditures of the leased premises. Such variable payments are recognized in lease expense in the period in which the variability is determined. Certain lease agreements may also include various non-lease components that primarily relate to property operating expenses associated with our office leases, which also vary each period. We have elected the practical expedient which allows us to combine lease and non-lease components for our ground and office leases and recognize variable non-lease components in lease expense when incurred.

We discount our future lease payments for each lease to calculate the related lease liability using an estimated incremental borrowing rate computed based on observable corporate borrowing rates reflective of the general economic environment, taking into consideration our creditworthiness and various financing and asset specific considerations, adjusted to approximate a secured borrowing for the lease term. We made a policy election to forgo recording right-of-use assets and the related lease liabilities for leases with initial terms of 12 months or less.

Income Taxes

We have elected to be taxed as a REIT under sections 856-860 of the Internal Revenue Code of 1986, as amended (the "Code"). Under those sections, a REIT which distributes at least 90% of its REIT taxable income as dividends to its shareholders each year and which meets certain other conditions will not be taxed on that portion of its taxable income which is distributed to its shareholders. Prior to the Separation, Vornado operated as a REIT and distributed 100% of its

REIT taxable income to its shareholders; accordingly, no provision for federal income taxes has been made in the accompanying consolidated financial statements for the periods prior to the Separation. We currently adhere and intend to continue to adhere to these requirements and to maintain our REIT status in future periods.

As a REIT, we can reduce our taxable income by distributing all or a portion of such taxable income to shareholders. Future distributions will be declared and paid at the discretion of the Board of Trustees and will depend upon cash generated by operating activities, our financial condition, capital requirements, annual dividend requirements under the REIT provisions of the Code and such other factors as our Board of Trustees deems relevant.

We also participate in the activities conducted by our subsidiary entities that have elected to be treated as taxable REIT subsidiaries ("TRS") under the Code. As such, we are subject to federal, state, and local taxes on the income from these activities. Income taxes attributable to our TRSs are accounted for under the asset and liability method. Under the asset and liability method, deferred income taxes arise from temporary differences between the tax basis of assets and liabilities and their reported amounts in our consolidated financial statements, which will result in taxable or deductible amounts in the future. We provide for a valuation allowance for deferred income tax assets if we believe all or some portion of the deferred tax asset may not be realized. Any increase or decrease in the valuation allowance that results from a change in circumstances that causes a change in the estimated ability to realize the related deferred tax asset is included in deferred tax benefit (expense).

ASC 740 ("Topic 740"), Income Taxes, provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in our consolidated financial statements. Topic 740 requires the evaluation of tax positions taken in the course of preparing our tax returns to determine whether the tax positions are "more-likely-than-not" of being sustained by the applicable tax authority. Tax benefits of positions not deemed to meet the more-likely-than-not threshold are recorded as a tax expense in the current year.

Earnings (Loss) Per Common Share

Basic earnings (loss) per common share is computed by dividing net income (loss) attributable to common shareholders by the weighted average common shares outstanding during the period. Unvested share-based compensation awards that entitle holders to receive non-forfeitable dividends are considered participating securities. Consequently, we are required to apply the two-class method of computing basic and diluted earnings (loss) that would otherwise have been available to common shareholders. Under the two-class method, earnings for the period are allocated between common shareholders and participating securities based on their respective rights to receive dividends. During periods of net loss, losses are allocated only to the extent the participating securities are required to absorb their share of such losses. Diluted earnings (loss) per common share reflects the potential dilution of the assumed exchange of various unit and share-based compensation awards into common shares to the extent they are dilutive.

Share-Based Compensation

The fair value of share-based compensation awards granted to our trustees, management or employees is determined, depending on the type of award, using the Monte Carlo or Black-Scholes methods, which is intended to estimate the fair value of the awards at the grant date using dividend yields, expected volatilities that are primarily based on available implied data and peer group companies' historical data and post-vesting restriction periods. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. The shortcut method is used for determining the expected life used in the valuation method.

Compensation expense is based on the fair value of our common shares at the date of the grant and is recognized ratably over the vesting period using a graded vesting attribution model. Compensation expense for share-based compensation awards made to retirement eligible employees is recognized over a six-month period after the grant date or over the remaining period until they become retirement eligible. We account for forfeitures as they occur. Distributions paid on unvested OP Units and LTIP Units are recorded to "Redeemable noncontrolling interests" in our consolidated balance sheets. Distributions paid on unvested Restricted Share Units ("RSUs") are recorded to "Additional paid-in capital" in our consolidated balance sheets.

Recent Accounting Pronouncements

Reference Rate Reform

In March 2020, the Financial Accounting Standards Board issued Accounting Standards Update 2020-04, Reference Rate Reform ("Topic 848"). Topic 848 contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance in Topic 848 is optional and may be elected over the period of March 12, 2020 through December 31, 2022 as reference rate reform activities occur. During the year ended December 31, 2021, we did not make any elections. During the year ended December 31, 2020, we elected to apply the hedge accounting expedients related to (i) the assertion that our hedged forecasted transactions remain probable and (ii) the assessments of effectiveness for future London Interbank Offered Rate ("LIBOR") indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves our past presentation of our derivatives. We will continue to evaluate the impact of the guidance and may apply other elections, as applicable.