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Published online by Cambridge University Press: 11 February 2009
In econometrics, seminonparametric (SNP) estimatorsoriginated in the consumer demand literature. TheFourier flexible form is a well-known example. Theidea is to replace the consumer's indirect utilityfunction with a truncated series expansion and thenuse a parametric procedure, such as nonlinearmultivariate regression, to set a confidenceinterval on an elasticity. More recently, SNPestimators have been used in nonlinear time seriesanalysis. A truncated Hermite expansion with an ARCHleading term is used as the conditional density ofthe process. The method of maximum likelihood isused to fit it to data.