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The idea about structural break in unit root hypothesis under time series model had received great amount of attention over many last decades. The importance of structural break in the mean had been comprehensively studied by Perron , Perron and Vogelsang , Zivot and Andrews  etc. This had also studied in considering of break in variance by Kim et al. , Cook , Kumar et al.  etc. There is sufficient contribution regarding break in mean and variance individually but both aredoi:10.15672/hjms.2018.626 fatcat:xjd6mxikbvhy5jwynxexspbz7a