Articles by Riyama Ambarwati (2)

Modeling and Forecasting Time Series Data by EGARCH Model

Mustofa Usman, Riyama Ambarwati, M. Yusuf S. Barusman, Faiz A.M. Elfaki and Widiarti

Journal of Engineering and Applied Sciences 13 ( 9 ): 2593 - 2602 , 2018

Application of Generalized Autoregressive Conditional Heteroscedasticity (GARCH) Model for Forecasting

M. Yusuf S. Barusman, Mustofa Usman, Riyama Ambarwati and Erica Virginia

Journal of Engineering and Applied Sciences 13 ( 10 ): 3418 - 3422 , 2018

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