owners; and stock-based compensation expense, which varies among companies as a result of different compensation plans companies have adopted. We exclude revenues for reimbursed costs and reimbursed costs which relate to the reimbursement of payroll costs and for system-wide services and programs that we operate for the benefit of our hotel owners as contractually we do not provide services or operate the related programs to generate a profit over the terms of the respective contracts. Over the long term, these programs and services are not designed to impact our economics, either positively or negatively. Therefore, we exclude the net impact when evaluating period-over-period changes in our operating results. Adjusted EBITDA includes reimbursed costs related to system-wide services and programs that we do not intend to recover from hotel owners. Finally, we exclude other items that are not core to our operations and may vary in frequency or magnitude, such as transaction and integration costs, asset impairments, unrealized and realized gains and losses on marketable securities, and gains and losses on sales of real estate and other.
Adjusted EBITDA is not a substitute for net income (loss) attributable to Hyatt Hotels Corporation, net income (loss), or any other measure prescribed by GAAP. There are limitations to using non-GAAP measures such as Adjusted EBITDA. Although we believe that Adjusted EBITDA can make an evaluation of our operating performance more consistent because it removes items that do not reflect our core operations, other companies in our industry may define Adjusted EBITDA differently than we do. As a result, it may be difficult to use Adjusted EBITDA or similarly named non-GAAP measures that other companies may use to compare the performance of those companies to our performance. Because of these limitations, Adjusted EBITDA should not be considered as a measure of the income (loss) generated by our business. Our management compensates for these limitations by referencing our GAAP results and using Adjusted EBITDA supplementally.
Adjusted General and Administrative (“G&A”) Expenses
Adjusted G&A Expenses, as we define it, is a non-GAAP measure. Adjusted G&A Expenses exclude the impact of deferred compensation plans funded through rabbi trusts and stock-based compensation expense. Adjusted G&A Expenses assist us in comparing our performance over various reporting periods on a consistent basis because it removes from our operating results the impact of items that do not reflect our core operations, both on a segment and consolidated basis.
Asset-Light Earnings Mix
Asset-Light Earnings Mix is calculated as Adjusted EBITDA from the management and franchising segment and distribution segment divided by Adjusted EBITDA, excluding overhead and eliminations. Our management uses this calculation to assess the composition of the Company’s earnings.
Average Daily Rate (“ADR”)
ADR represents hotel room revenues, divided by the total number of rooms sold in a given period. ADR measures the average room price attained by a hotel, and ADR trends provide useful information concerning the pricing environment and the nature of the customer base of a hotel or group of hotels. ADR is a commonly used performance measure in our industry, and we use ADR to assess the pricing levels that we are able to generate by customer group, as changes in rates have a different effect on overall revenues and incremental profitability than changes in occupancy, as described below.
Comparable system-wide and Comparable owned and leased
“Comparable system-wide” represents all properties we manage, franchise, or provide services to, including owned and leased properties, that are operated for the entirety of the periods being compared and that have not sustained substantial damage, business interruption, or undergone large scale renovations during the periods being compared. Comparable system-wide also excludes properties for which comparable results are not available. We may use variations of comparable system-wide to specifically refer to comparable system-wide hotels, including our wellness resorts, or our all-inclusive resorts, for those properties that we manage, franchise, or provide services to within the management and franchising segment. “Comparable owned and leased” represents all properties we own or lease that are operated and consolidated for the entirety of the periods being compared and have not sustained substantial damage, business interruption, or undergone large-scale renovations during the periods being compared. Comparable owned and leased also excludes properties for which comparable results are not available. We may use variations of comparable owned and leased to specifically refer to comparable owned and leased hotels, including our wellness resorts, or our all-inclusive resorts, for those properties that we own or lease within the owned and leased segment. Comparable system-wide and comparable owned and leased are commonly used as a basis of measurement in our industry. “Non-comparable system-wide” or “non-comparable owned and leased” represent all properties that do not meet the respective definition of “comparable” as defined above.