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2 results on '"Yimin Zhou"'

1. A moment-based criterion for determining the number of components in a normal mixture model.

Author

Yimin Zhou, Liyan Han, Dan Wang, and Libo Yin

Subjects
*GAUSSIAN mixture models, *FINITE mixture models (Statistics), *MONTE Carlo method, *SKEWNESS (Probability theory), *KURTOSIS
Abstract

Determining the number of components is a crucial issue in a mixture model. A moment-based criterion is considered to estimate the number of components arising from a normal mixture model. This criterion is derived from an omnibus statistic involving the skewness and kurtosis of each component. The proposed criterion additionally provides a measurement for the model fit in an absolute sense. The performances of our criterion are satisfactory compared with other classical criteria through Monte-Carlo experiments. [ABSTRACT FROM AUTHOR]

Published
2017
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2. Telecommunications deregulation and subadditive costs: are local telephone monopolies unnatural?

Author

Wilson, Wesley W. and Yimin Zhou

Subjects
Competition (Economics) -- Research, Monopolies -- Research, Telecommunications services industry -- Research, Business, Business, international, Telecommunications Act of 1996
Abstract

Research is presented concerning the control of business enterprise heterogeneity through the occurrence of natural monopolies in the local telecommunications market. The suitability of local markets for competition is discussed.

Published
2001

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