market freq_block round_num bid_amt bidder_num date time net_bid_amt sort_col_1 sort_col_2 E027 B 184 113000 3060 12/3/97 12:30:29 113000 1 80 E043 B 184 44000 3060 12/3/97 12:30:29 44000 1 128 E043 C 184 92000 3060 12/3/97 12:30:29 92000 1 129