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observation. Practical issues related to the specification of initial values, model-based clustering and discriminant procedure …
Persistent link: https://www.econbiz.de/10010665708
This paper describes a way of constructing an ECM algorithm such that it converges at the rate of the EM algorithm. The approach is motivated by the well known conjugate directions algorithm, and a special case of it is when the parameters corresponding to different CM steps are orthogonal....
Persistent link: https://www.econbiz.de/10004980575
matrices, which in turn provides a clear guideline as to when one can use mixture analysis for clustering high dimensional data. …
Persistent link: https://www.econbiz.de/10010572294
functional objects and also find an optimal subspace for clustering, simultaneously. The method is based on the k-means criterion … for functional data and seeks the subspace that is maximally informative about the clustering structure in the data. An …
Persistent link: https://www.econbiz.de/10010846119
Persistent link: https://www.econbiz.de/10005602931
Formulas for estimating sample sizes are presented to provide specified levels of power for tests of significance from a longitudinal design allowing for subject attrition. These formulas are derived for a comparison of two groups in terms of single degree-of-freedom contrasts of population...
Persistent link: https://www.econbiz.de/10010776007
clustering approach into the usual panel data model specification. A case study in the field of R&D variables illustrates the …
Persistent link: https://www.econbiz.de/10005008511
the Self-Organizing Map (SOM). Through the use of SOM clustering and data visualization can be conducted simultaneously …
Persistent link: https://www.econbiz.de/10011143052
Our study contains application of Latent Semantic Indexing on financial crises prediction. Hypothesis to test was that equity markets are able to predict even sharp changes in monetary policy during a quarter ahead of such a change (which was searched during two quarters that followed). This...
Persistent link: https://www.econbiz.de/10008545891
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