请教各位大神：我想确定断点回归设计的最佳带宽。使用的程序为rd模块。

rd    y    x      right_of_cutpoint,    mbw(10(10)200)  bdep ox
变量定义：y是被解释变量；x是解释变量；right_of_cutpoint表示偏离断点的距离（大于断点为正，小于断点为负）。

得出的最优带宽结果如图所示，请问最优带宽是多少呢？




相关的资料如下：
1、bwidth(real) allows specification of a bandwidth for local linear regressions.  The default is to use the estimated optimal bandwidth for a "sharp" design as given by Imbens and  Kalyanaraman (2009).  The optimal bandwidth minimizes MSE, or squared bias plus variance, where a smaller bandwidth tends to produce lower bias and higher variance. Note that the  optimal bandwidth will often tend to be larger for a fuzzy design, due to the additional variance that arises from the estimation of the jump in the conditional mean of treatment.

2、bdep requests a graph of estimates versus bendwidths.