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The aim of this research is to measure and determine the level of general inflation then calculate and determine the duration needed to diminish to the natural level. The variable in this research is general inflation in North Sumatera Province from 2007 to 2017. The method used is the model of autoregressive time series. Based on the results of the research using Eviews 6, the data showed that persistence of general inflation in Central Java is high, it is 0.85. As well as the time required to diminish the inflation back to natural level requires long time, they are 6 months. The suggestion from this study are expected through Inflation Control Team Regional (TPID) make some kind of policy that could control the inflation of foodstuffs in order to effect the shock can be anticipated that by making the traffic production and distribution of specialty food commodity linked per regency of North Sumatera province. To anticipate the effects of shock as a result of extreme weather may cooperate with the Meteorology and Geophysics Agency (BMKG) in monitoring and weather forecasting as an ingredient of the policy formulation