Modern school mainly contains clientele effect thought, signaling hypothesis and agency cost theory.
现代学派主要有追随者效应学派，信号假说，代理成本理论。
In the process of evaluating the intervention effect, researchers rely on two theoretical hypotheses: one is the portfolio-balance theories, the other is the signaling theory.
在评估汇率干预有效性的过程中，研究者根据两种理论假设，探讨汇率干预的效应。
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