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Abstract Details

Activity Number: 642
Type: Topic Contributed
Date/Time: Thursday, August 2, 2012 : 10:30 AM to 12:20 PM
Sponsor: Section on Nonparametric Statistics
Abstract - #306145
Title: Semiparametric Mixtures of Regressions
Author(s): David Hunter*+ and Derek Young
Companies: Penn State University and U.S. Census Bureau
Address: Department of Statistics, State College, PA, ,
Keywords: Density Estimation ; EM Algorithm ; Finite Mixture Model ; Identifiability
Abstract:

We present an algorithm for estimating parameters in a mixture-of-regressions model in which the errors are assumed to be independent and identically distributed but no other assumption is made. A sufficient condition for the identifiability of the parameters is stated and a proof is outlined. Several different versions of the algorithm, including one that has a provable ascent property, are introduced. Numerical tests indicate the effectiveness of some of these algorithms.


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