In theory, semiparametric functional coefficient quantile regression has less hypothesis and more extensive application in order to explain economic phenomena accurately. 半参数变系数分位数回归模型，在理论上其假设前提条件限制比较少，在应用上具有很好的灵活性和很广的适用空间，能够更好地解释现实经济问题。
In this paper, we mainly discuss nonparametric and semiparametric functional coefficient quantile regressions, their estimation methods and applications. 在本文中，主要讨论了非参数和半参数变系数分位数回归模型的估计及其应用。
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