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À propos de : Efficient Estimation of Agricultural Time Series Models with Nonnormal Dependent Variables        

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  • Efficient Estimation of Agricultural Time Series Models with Nonnormal Dependent Variables
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  • This article proposes using an expanded form of the Johnson SU family as a way to approximate nonnormal distributions in regression models. The distribution is one of the few that allows modeling heteroskedasticity and autocorrelation. The technique is evaluated with Monte Carlo simulation and illustrated through an empirical model of the West Texas cotton basis. Given nonnormality, this technique can substantially reduce the variance of slope parameter estimates relative to least squares procedures.
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