SveuÄÂiliÅ¡te u Zagrebu Ekonomski fakultet
SveuÄÂiliÅ¡te u Zagrebu Ekonomski fakultet
SveuÄÂiliÅ¡te u Zagrebu Ekonomski fakultet
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ARIMA(0,1,1) modeli – IMA(1,1)( 1 B ) Y (1 B)t 1t111Y tY t1 t 1 t1 Integrirani model pomičnih prosjeka Y t ~ IMA(1,1) → Y t =(1-B)Y t je stacionaranMA(1)• ACF Y t opadaju veoma sporo (nestacionarnost)• ACF Y t (stacionaran) ima karakteristike MA(1)procesa, tj. iščezava nakon pomaka k=1