题主今天打算用RD回归研究一下南北方城市空气质量的差别，我用的命令是
rd avaqi north distance，z0（0） mbw（50 100 200）
avaqi是地级市空气质量均值，north是处理变量，distance代笔地级城市到南北回归线的距离，在分界线以北距离取正值，此时north取值为1，在分界线以南距离取负值且north为0，我回归出来的结果是这样子的，
rd aqiav north juli ,z0 str mbw(50 100 200) GR B OX
Three variables specified; jump in treatment  
at Z=0 will be estimated. Local Wald Estimate
is the ratio of jump in outcome to jump in treatment.
Assignment variable Z is juli
Treatment variable X_T is north
Outcome variable y is aqiav
no observations
我觉得是因为距离变量以米为单位太大了，于是把该变量除以100000，重新回归，结果就变成了这个样子
. rd aqiav north juli2 ,z0(0) str mbw(50 100 200) GR B OX
Three variables specified; jump in treatment  
at Z=0 will be estimated. Local Wald Estimate
is the ratio of jump in outcome to jump in treatment.
Assignment variable Z is juli2
Treatment variable X_T is north
Outcome variable y is aqiav
(196 missing values generated)
(196 missing values generated)
(196 missing values generated)
Estimating for bandwidth 3.62935727502711
A predicted value of treatment at cutoff lies outside feasible range;
switching to local mean smoothing for treatment discontinuity.
score variables for model __00000P contain missing values
不死心的我drop掉缺失值，结果变成这样子
. rd aqiav north juli2 ,z0(0) str mbw(50 100 200) GR B OX
Three variables specified; jump in treatment  
at Z=0 will be estimated. Local Wald Estimate
is the ratio of jump in outcome to jump in treatment.
Assignment variable Z is juli2
Treatment variable X_T is north
Outcome variable y is aqiav
(82 missing values generated)
(82 missing values generated)
(82 missing values generated)
Estimating for bandwidth 3.629357275027114
score variables for model __00000P contain missing values
r(322);
求问大神这个错误提示是代表什么意思呢？
我不懂模型是哪里设定错误了，小博士第一篇论文，还望大伙多多帮忙，感激不尽！