EXHIBIT 11

BARRETT BUSINESS SERVICES, INC.
STATEMENT OF CALCULATION OF BASIC
AND DILUTED COMMON SHARES OUTSTANDING


Three Months Ended
September 30, 2001
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Weighted average number of basic shares outstanding 6,152,175

Stock option plan shares to be issued at prices ranging
from $1.45 to $17.94 per share 907,553


Less: Assumed purchase at average market price during the
period using proceeds received upon exercise of
options and purchase of stock, and using tax benefits
of compensation due to premature dispositions (879,988)
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Weighted average number of diluted shares outstanding 6,179,740
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