can you use rdd or cointegration why rdd approach how to use cointegration in rdd why use rdd and panel cointegration what is the difference between rdd and cointegration? why rdd and cointegration when to use rdd panel cointegration why rdd over panel cointegration what is the difference between a parametric and a panel cointegration why rdd versus panel cointegrations which approach can rdd use why use rdd over panel cointegration what is the difference between rdd and panel cointegration why do we use nonparametric approach to rdd? how to use rdd vs panel cointegration why use rdd how to interpret panel cointegration when does RDD use panel why use panel cointegration instead of rdd why use rdd vs panel cointegration