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Predictive Influence of Unavailable Values of Future Explanatory Variables in a Linear Model
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https://doi.org/10.1080/03610926.2010.513794Abstract
We consider an approach to prediction in linear model when values of the future explanatory variables are unavailable, we predict a future response y f at a future sample point x f when some components of x f are unavailable. We consider both the cases where x f are dependent and independent but normally distributed. A Taylor expansion is used to derive an approximation to the predictive density, and the influence of missing future explanatory variables (the loss or discrepancy) is assessed using the Kullback-Leibler measure of divergence. This discrepancy is compared in different scenarios including the situation where the missing variables are dropped entirely. © 2011 Copyright Taylor and Francis Group, LLC.
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