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Jurnal Ekonomi Malaysia

38 2004 63 – 79

Tabiat Kemeruapan Perubahan Harga Getah Asli Malaysia

Pusat Pengajian Sains Matematik
Fakulti Sains dan Teknologi
Universiti Kebangsaan Malaysia
43600 UKM Bangi
Selangor Darul Ehsan


Pusat Pengajian Sains Matematik
Fakulti Sains dan Teknologi
Universiti Kebangsaan Malaysia
43600 UKM Bangi
Selangor Darul Ehsan


Abstract

This study presents the trend of volatility in natural rubber price of Malaysia for Ribbed Smoked Sheet Grade 1 (RSS 1) and Standard Malaysian Rubber Grade 20 (SMR 20). The price changes in RSS 1 and SMR 20 indicate that the empirical distributions have heavy tails and sharp peaks at the center compared to the normal distributions. In addition, the variance underlying these price variables may be varying over time. Therefore, the data cannot be modeled as standard time series model with assumption variance is constant over time. Alternatively, ARCH and GARCH model were used. One of the parts that many researchers are interested is the asymmetry (leverage effect) in the variance. In this study, this part has been captured by two model of the ARCH family: the EGARCH and GJR-
GARCH. Result indicates that both EGARCH and GJR-GARCH models did not generally support asymmetry in the pattern of volatility of both RSS 1 and SMR 20. After comparing of these four models, it can be shown that the GARCH (1,1) model fit to data very satisfactorily.

Keywords

ARCH; GARCH; getah asli; kemeruapan harga
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Bibliography

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isa, , & Jamil, (2004). Tabiat Kemeruapan Perubahan Harga Getah Asli Malaysia. Jurnal Ekonomi Malaysia, 38, 63–79.

@article{isa2004tabiat,
  title={Tabiat Kemeruapan Perubahan Harga Getah Asli Malaysia},
  author={isa, zaidi and Jamil, Norhayati},
  journal={Jurnal Ekonomi Malaysia},
  volume={38},
  number={},
  pages={63—79},
 

year={2004},
}

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