CREATE TABLE table_203_450 (id DECIMAL, "team" TEXT, "outgoing manager" TEXT, "manner of departure" TEXT, "date of vacancy" TEXT, "replaced by" TEXT, "date of appointment" TEXT, "position in table" TEXT)

who was manager of manchester city after stuart pearce left in 2007 ?
SELECT "replaced by" FROM table_203_450 WHERE "outgoing manager" = 'stuart pearce'
SELECT "replaced by" FROM "table_203_450" WHERE "outgoing manager" = 'stuart pearce'