比率变量是具有相等单位和绝对零点的变量，例如身高、体重等。
在这篇文章中，我们通过采用多个体模型和引入两个变量——识别能力和估价比率来说明在什么条件下会发生逆向选择现象。
In this paper, we propose an agent-based model to examine what conditions can make the adverse selection to take its effect by introducing two variables-cognitive capability and valuation ratio.
无论在财务困境前1年还是前2年，现金流量类变量在会计比率的基础上均具有显著的增量信息含量。
Cash flow variables provide significant incremental information content based on accrued model both 1 and 2 year in advance of financial distress.
最后，论文从投资者投资决策心理出发建立转换比率模型，得到转换比率是内生变量的结论。
At last, the thesis proceeds from psychology of investor's investment decision and sets up the conversion ratio model, and then concludes that the conversion ratio is endogenous variable.
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