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Test for Autoregressive Conditional Heteroscedasticity in Naira/US Dollar Exchange Rate in Nigeria

机译:尼日利亚奈拉/美元汇率的自回归条件异方差检验

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The objective of this paper is to analyse the behaviour of Naira/US$ exchange rates in Nigeria. Specifically, the paper examines the descriptive statistics of Naira/US$ exchange rates and whether the series follow autoregressive conditional heteroscedastic (ARCH) using monthly data sample covering January 2000 to December 2013. The estimates from descriptive statistics show that the official market exchange rate in Nigeria is negatively skewed with platykurtic distribution. The Jarque-Bera statistics support evidence of non-normality in the Naira/US$ exchange rate series. The results of the augmented Dickey-Fuller (ADF) unit root tests suggest that the series contain unit root at level but are stationary at first difference. Estimates from the ARCH tests show that official market exchange rates in Nigeria are heteroscedastic. This implies that ARCH family models are appropriate for modeling volatility exchange rate in Nigeria.
机译:本文的目的是分析奈拉/美元汇率在尼日利亚的行为。具体来说,本文使用2000年1月至2013年12月的月度数据样本,研究了奈拉/美元汇率的描述性统计数据以及该系列是否遵循自回归条件异方差(ARCH)。尼日利亚的负寒带分布不利。 Jarque-Bera统计数据支持奈拉/美元汇率序列不正常的证据。增强的Dickey-Fuller(ADF)单位根检验的结果表明,该序列在水平上包含单位根,但在第一个差异处是固定的。 ARCH测试的估计表明,尼日利亚的官方市场汇率是异方差的。这意味着ARCH族模型适用于对尼日利亚的波动率汇率进行建模。

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