短語詞組短語informativeness principle 信息原則relative informativeness 相對信息度marker informativeness 標記信息Earnings Informativeness 會計利潤信息含量informativeness measure 信息性測度cue informativeness 線索信息性high informativeness 高信息度the graded informativeness condition 遞增條件stock price informativeness 信息含量 返回 informativeness