This excerpt taken from the EBAY DEF 14A filed May 16, 2005.
Under the eIP, the Compensation Committee will determine the quarterly, fiscal year, or other performance period for measuring actual performance. The Compensation Committee will establish for each performance period:
Performance measures may be based on a selection of measurable business criteria, including trading volume, users, gross merchandise volume, total payment volume, revenue, operating income, EBITDA, net income, earnings per share, return on assets or equity, cash flow, net or operating margin, economic profit, stock price appreciation, total stockholder return, employee productivity, and customer satisfaction metrics. These measures may be described in terms of growth, an absolute number, or relative to an external group, and may be calculated on a GAAP or pro forma basis.
The Compensation Committee may set performance periods and performance goals that differ from participant to participant. This may include designating performance goals on either company-wide or business unit performance, as appropriate for a participants specific responsibilities.