However, because NOI excludes depreciation and amortization expense and captures neither the changes in the value of our properties that result from use or market conditions, nor the level of capital expenditures and leasing commissions necessary to maintain the operating performance of our properties (all of which have a real economic effect and could materially impact our results from operations), the utility of NOI as a measure of our performance is limited. Other equity REITs may not calculate NOI in a similar manner and, accordingly, our NOI may not be comparable to such other REITs' NOI. Accordingly, NOI should be considered only as a supplement to net income as a measure of our performance.