Table 4 Results of ARIMA model identification for Seoul and Busan

ARIMA model (Seoul)	AIC	ARIMA model (Busan)	AIC
ARIMA(0,1,0)	110.0207	ARIMA(0,2,0)	63.56566
ARIMA(0,1,1)	112.4087	ARIMA(1,2,0)	64.18054
ARIMA(1,1,0)	114.3707	ARIMA(0,2,1)	Inf
ARIMA(1,1,1)	115.8491	ARIMA(1,2,1)	Inf
ARIMA(2,1,2)	Inf	ARIMA(2,2,2)	Inf