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Iain Johnstone (Stanford University)
Monday 25 June 2018, 11:00-11:45
Eigenstructure in high dimensional random effects models
- đ¤ Speaker: Iain Johnstone (Stanford University)
- đ Date & Time: Monday 25 June 2018, 11:00 - 11:45
- đ Venue: Seminar Room 1, Newton Institute
Abstract
The eigenstructure of i.i.d. samples from high dimensional data is known to show phenomena unexpected from experience with low dimensions—eigenvalue spreading, bias and eigenvector inconsistency. Motivated by some problems in quantitative genetics, we now consider high dimensional data with more than one level of variation, and more specifically the spectral properties of estimators of the various components of variance matrices. We briefly describe bulk and edge eigenvalue distributions in this setting, and then focus more attention on properties and estimation of 'spiked' models. This is joint work with Zhou Fan and Yi Sun.
Series This talk is part of the Isaac Newton Institute Seminar Series series.
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