This excerpt taken from the GS 10-Q filed Apr 9, 2008.
Due to the highly integrated nature of international financial markets, the firm manages its businesses based on the profitability of the enterprise as a whole. Since a significant portion of the firms activities require cross-border coordination in order to facilitate the needs of the firms clients, the methodology for allocating the firms profitability to geographic regions is dependent on the judgment of management.
Geographic results are generally allocated as follows:
The following table sets forth the total net revenues of the firm and its consolidated subsidiaries by geographic region allocated on the methodology described above, as well as the percentage of total net revenues for each geographic region: