Dear Dr. Chen, the method you introduced is very innovative and very useful also for evaluation the effect of policies adopted sequentially. For example, in the US, different states established laws in different years to legalize marijuana use, but no consistent results are reported from various studies to evaluate the impact of such legal measures on marijuana use. It is possible for you provide a R codes to conduct the analysis? Many researchers outside of the math and engineering do not use Matlab.
Another question: It would be great if you can elaborate a bit between CSI and the geographically weighted regression.