Fryzlewicz, Piotr


Professor Piotr Fryzlewicz  

Department

Position held

Department of Statistics

Professor of Statistics

Experience keywords:

wavelets; time series; nonstationary time series; change-point detection; portfolio construction; covariance estimation; GARCH models

Research summary > [Click to expand]

My research interests are in modern, especially multiscale, techniques in time series analysis, for performing tasks such as nonstationarity and nonlinearity detection and time series classification. I am also interested in variable selection in complex statistical models. My industry experience is in portfolio and trading strategy construction.

Sectors and industries to which research relates:

BankingFinancial Services

Countries and regions to which research relates:

All

Languages:

Spanish [Spoken: Intermediate, Written: Intermediate]; Polish [Spoken: Fluent, Written: Fluent]; Chinese (Mandarin) [Spoken: Intermediate, Written: Basic]

Contact Points

LSE phone number:

+44 (0)20 7955 7953

Publications

The following references are sourced from LSE Research Online|. References that are linked lead to the full text.

2012

Fryzlewicz, Piotr (2012) Time–Threshold Maps: Using information from wavelet reconstructions with all threshold values simultaneously. Journal of the Korean Statistical Society, 41 (2). pp. 145-159. ISSN 1226-3192

Cho, Haeran and Fryzlewicz, Piotr (2012) High dimensional variable selection via tilting. Journal of the Royal Statistical Society: series B (statistical methodology), 74 (3). pp. 593-622. ISSN 1369-7412

Fryzlewicz, Piotr (2012) Rejoinder: time-threshold maps: using information from wavelet reconstructions with all threshold values simultaneously. Journal of the Korean Statistical Society, 41 (2). pp. 173-175. ISSN 1226-3192

Cho, Haeran and Fryzlewicz, Piotr (2012) Multiscale and multilevel technique for consistent segmentation of nonstationary time series. Statistica Sinica, 22 (1). pp. 207-229. ISSN 1017-0405

2011

Fryzlewicz, Piotr and Oh, H. S. (2011) Thick pen transformation for time series. Journal of the Royal Statistical Society, series B, 73 (4). pp. 499-529. ISSN 1369-7412

Christodoulaki, Olga and Cho, Haeran and Fryzlewicz, Piotr (2011) A reflection of history: fluctuations in Greek sovereign risk between 1914 and 1929. GreeSE, 50. Hellenic Observatory, London, UK

Fryzlewicz, Piotr and Subba Rao, Suhasini (2011) Mixing properties of ARCH and time-varying ARCH processes. Bernoulli, 17 (1). pp. 320-346. ISSN 1350-7265

Cho, Haeran and Fryzlewicz, Piotr (2011) Multiscale interpretation of taut string estimation and its connection to Unbalanced Haar wavelets. Statistics and computing, 21 pp. 671-681. ISSN 0960-3174

2010

Antoniadis, Anestis and Fryzlewicz, Piotr and Letué, Frédérique (2010) The Dantzig selector in Cox's proportional hazards model. Scandinavian journal of statistics, 37 (4). pp. 531-552. ISSN 0303-6898

Sanderson, Jean and Fryzlewicz, Piotr and Jones, M. W. (2010) Estimating linear dependence between nonstationary time series using the locally stationary wavelet model. Biometrika, 97 (2). pp. 435-446. ISSN 0006-3444

Fryzlewicz, Piotr and Oh, Hee-Seok (2010) On the thick-pen transformation for time series. Oberwolfach reports, 7 (1). pp. 179-216. ISSN 1660-8933

Fryzlewicz, Piotr (2010) Wavelet methods. Wiley interdisciplinary reviews: computational statistics, 2 (6). pp. 654-667. ISSN 1939-5108

2009

Fryzlewicz, Piotr and Ombao, Hernando (2009) Consistent classification of non-stationary time series using stochastic wavelet representations. Journal of the American Statistical Association, 104 (485). pp. 299-312. ISSN 0162-1459

2008

Cho, Haeran and Fryzlewicz, Piotr (2008) Multiscale breakpoint detection in piecewise stationary AR models. In:IASC2008 (5-8 December 2008 : Yokohama, Japan).

Fryzlewicz, Piotr and Nason, Guy P. and von Sachs, Rainer (2008) A wavelet-Fisz approach to spectrum estimation. Journal of time series analysis, 29 (5). pp. 868-880. ISSN 0143-9782

Fryzlewicz, Piotr and Sapatinas, Theofanis and Subba Rao, Suhasini (2008) Normalized least-squares estimation in time-varying ARCH models. Annals of statistics, 36 (2). pp. 742-786. ISSN 0090-5364

Fryzlewicz, Piotr (2008) Data-driven wavelet-Fisz methodology for nonparametric function estimation. Electronic journal of statistics, 2 pp. 863-896. ISSN 1935-7524

2007

Fryzlewicz, Piotr (2007) Unbalanced Haar technique for nonparametric function estimation. Journal of the American Statistical Association, 102 (480). pp. 1318-1327. ISSN 0162-1459

Sanderson, Jean and Fryzlewicz, Piotr (2007) Locally stationary wavelet coherence with application to neuroscience. In:Proceedings of the 56th session of the International Statistical Institute (22-29 August 2007 : Lisbon, Portugal).

Sanderson, Jean and Fryzlewicz, Piotr (2007) Locally stationary wavelet coherence with application to neuroscience. In: Barber, S. and Baxter, P. D. and Mardia, K. V., (eds.) Systems biology and statistical bioinformatics. Leeds University Press, Leeds, UK, pp. 69-72.

Fryzlewicz, Piotr (2007) Bivariate hard thresholding in wavelet function estimation. Statistica Sinica, 17 (4). pp. 1457-1481. ISSN 1017-0405

Fryzlewicz, Piotr and Delouille, V´eronique and Nason, Guy P. (2007) GOES-8 X-ray sensor variance stabilization using the multiscale data-driven Haar-Fisz transform. Journal of the Royal Statistical Society: series C, 56 (1). pp. 99-116. ISSN 0035-9254

2006

Fryzlewicz, Piotr and Sapatinas, Theofanis and Subba Rao, Suhasini (2006) A Haar-Fisz technique for locally stationary volatility estimation. Biometrika, 93 (3). pp. 687-704. ISSN 0006-3444

Motakis, E. S. and Nason, Guy P. and Fryzlewicz, Piotr and Rutter, G. A (2006) Variance stabilization and normalization for one-color microarray data using a data-driven multiscale approach. Bioinformatics, 22 (20). pp. 2547-2553. ISSN 1367-4803

Antoniadis, Anestis and Fryzlewicz, Piotr (2006) Parametric modelling of thresholds across scales in wavelet regression. Biometrika, 93 (2). pp. 465-471. ISSN 0006-3444

Fryzlewicz, Piotr and Delouille, V (2006) A data-driven HAAR-FISZ transform for multiscale variance stabilization. In: Proceedings of the 13th IEEE/SP Workshop on Statistical Signal Processing. IEEE, California, USA, pp. 539-544. ISBN 0780394038

Fryzlewicz, Piotr and Nason, Guy P. (2006) Haar-Fisz estimation of evolutionary wavelet spectra. Journal of the Royal Statistical Society: series B, 68 (4). pp. 611-634. ISSN 1369-7412

2005

Fryzlewicz, Piotr (2005) Modelling and forecasting financial log-returns as locally stationary wavelet processes. Journal of applied statistics, 32 (5). pp. 503-528. ISSN 0266-4763

2004

Fryzlewicz, Piotr and Nason, Guy P. (2004) A Haar-Fisz algorithm for poisson intensity estimation. Journal of computational and graphical statistics, 13 (3). pp. 621-638. ISSN 1061-8600

Fryzlewicz, Piotr and Nason, Guy P. (2004) Smoothing the wavelet periodogram using the Haar-Fisz transform. Department of Mathematics, University of Bristol, Bristol, UK

2003

Fryzlewicz, Piotr and van Bellegem, Sébastien and von Sachs, Rainer (2003) Forecasting non-stationary time series by wavelet process modelling. Annals of the Institute of Statistical Mathematics, 55 (4). pp. 737-764. ISSN 0020-3157

Fryzlewicz, Piotr (2003) Wavelet techniques for time series and poisson data.. University of Bristol;Mathematics

van Bellegem, Sébastien and Fryzlewicz, Piotr and von Sachs, Rainer (2003) A wavelet-based model for forecasting non-stationary processes. In: Gazeau, J-P and Kerner, R and Antoine, J-P and Metens, S, (eds.) GROUP 24: physical and mathematical aspects of symmetries: proceedings of the 24th international colloquium on group theoretical methods in physics, Paris, 15-20 July 2002. Institute of Physics Publishing , Bristol, UK, pp. 955-958. ISBN 9780750309334

2000

Fryzlewicz, Piotr (2000) The application of linear programming to American option valuation in the jump-diffusion model. Wroclaw University of Technology;Mathematics

LSE Research Online is the primary resource for references to publications. For queries or updates please email the LSE Research Online team at lseresearchonline@lse.ac.uk|.

Expert Image

Personal website

Awards

2007-2008 University Research Fellowship; Nuffield Foundation University of Bristol 2005-2007 Award to Newly Appointed Lecturers in Science, Engineering and Mathematics; Universities UK 2000-2003 Overseas Research Student Award

 

Browse the Experts Directory:

LSE Research Online|

Collection of LSE research outputs

LSE Consulting|

Service providing unique access
to LSE's expertise

Create or update your
online profile
|

[access restricted to staff]

Research highlights|

Short articles about LSE research