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Detecting changes in mean levels with atheoretical regression trees.
(University of Canterbury. Dept. of Mathematics and Statistics, 2005)
In this paper the study of long term changes in lake mean water levels is faced as a problem of detecting multiple structural breaks in the mean occurring at unknown dates. We propose a non parametric approach that ...
Using graphical modelling in official statistics
(University of Canterbury, 2004)
People using economic time series would like them to be available as soon as possible after the end of the reference period. However there can be difficulties in getting all the responses required to produce a series of ...