Direct Simultaneous Inference in Additive Models and Its Application to Model Undernutrition

Manuel Wiesenfarth, Tatyana Krivobokova, Stephan Klasen and Stefan Sperlich ()

Journal of the American Statistical Association, 2012, vol. 107, issue 500, 1286-1296

Abstract: This article proposes a simple and fast approach to build simultaneous confidence bands and perform specification tests for smooth curves in additive models. The method allows for handling of spatially heterogeneous functions and its derivatives as well as heteroscedasticity in the data. It is applied to study the determinants of chronic undernutrition of Kenyan children, with a particular focus on the highly nonlinear age pattern in undernutrition. Model estimation using the mixed model representation of penalized splines in combination with simultaneous probability calculations based on the volume-of-tube formula enable the simultaneous inference directly, that is, without resampling methods. Finite sample properties of simultaneous confidence bands and specification tests are investigated in simulations. To facilitate and enhance its application, the method has been implemented in the R package AdaptFitOS .

Date: 2012
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Working Paper: Direct Simultaneous Inference in Additive Models and its Application to Model Undernutrition (2011)
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Persistent link: https://EconPapers.repec.org/RePEc:taf:jnlasa:v:107:y:2012:i:500:p:1286-1296

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DOI: 10.1080/01621459.2012.682809

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