Exhibit 11 PIA MERCHANDISING SERVICES, INC. COMPUTATION OF EARNINGS PER SHARE - -------------------------------------------------------------------------------- (IN THOUSANDS, EXCEPT PER SHARE DATA) THREE MONTHS SIX MONTHS ENDED JUNE 30, ENDED JUNE 30, 1996 1995 1996 1995 ---- ---- ---- ---- PRIMARY Net income $ 206 $ 736 $1,104 $1,439 ------- ------- ------ ------ ------- ------- ------ ------ Common and common equivalent shares outstanding: Weighted average shares of common stock 5,792 3,084 5,047 3,084 Options 547 175 531 175 Warrants 115 1,050 114 1,050 ------- ------- ------ ------ Common and common equivalent shares used in computing per share amounts 6,454 4,309 5,692 4,309 ------- ------- ------ ------ Net income per common and common equivalent share $ .03 $ .17 $ .19 $ .33 ------- ------- ------ ------ ------- ------- ------ ------ FULLY DILUTED Net income $ 206 $ 736 $1,104 $1,439 ------- ------- ------ ------ ------- ------- ------ ------ Common and common equivalent shares outstanding: Weighted average shares of common stock 5,792 3,084 5,046 3,084 Options 419 175 515 175 Warrants 101 1,050 101 1,050 ------- ------- ------ ------ Common and common equivalent shares used in computing per share amounts 6,311 4,309 5,662 4,309 ------- ------- ------ ------ Net income per common and common equivalent share $ .03 $ .17 $ .20 $ .33 ------- ------- ------ ------ ------- ------- ------ ------