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seminario Giovanni Puccetti in Bicocca
by Fabio Bellini 28 Nov '13

28 Nov '13

Il giorno martedì 3 dicembre alle ore 14.30 presso la aula seminari del Dipartimento di Statistica e Metodi Quantitativi della Università di Milano Bicocca, al IV piano dell'edificio U7, il dott. Giovanni Puccetti della Università di Firenze terrà un seminario su The Rearrangement Algorithm: a new tool for computing bounds on risk measures Abstract: We introduce a numerical algorithm which allows for the computation of sharp upper and lower bounds on the Value-at-Risk or on the Expected Shortfall of high-dimensional risk portfolios having fixed marginal distributions. These bounds can be interpreted as a measure of model uncertainty induced by possible dependence scenarios. We also illustrate several recent applications of the algorithm to quantitative risk management and applied probability. Tutti gli interessati sono invitati a partecipare. Prof. Fabio Bellini Department of Statistics and Quantitative Methods University of Milano-Bicocca Via Bicocca degli Arcimboldi 8, 20126 Milano 0039-2-64483119 http://www.economia.unimib.it/bellini

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Fwd: [World] One-year postdoc position in combinatorics in Paris
by Gustavo Posta 26 Nov '13

26 Nov '13

Begin forwarded message: > From: Frederique Bassino <Frederique.Bassino(a)lipn.univ-paris13.fr> > Subject: [World] One-year postdoc position in combinatorics in Paris > Date: 26 novembre 2013 14:35:36 GMT+01:00 > To: world(a)alea-research.eu > > One-year Postdoc position at University Paris 13 > in Combinatorics and application to probability and statistical physics. > > > A one-year postdoc position in combinatorics at the University Paris > 13 is available. The position is within the framework of The ALEA > Sorbonne project, which is funded by the IDEX Universite Sorbonne > Paris Cité group members of the CALIN team (LIPN Paris 13), the > Combinatorics and Automata teams (LIAFA Paris Diderot) and the > Probability et Statistics team (LAGA Paris 13) and deals with discrete > random structures coming from theoretical computer science, > probability, or statistical physics. > > Anyone with research interests close to one of the topic above is > welcome to apply. Applicants should have a PhD at the starting date of the post-doc. > > The successful candidate will be appointed by University Paris 13, > will join LIPN (University Paris 13) and collaborate with LIAFA > (University Paris Diderot) and LAGA (University Paris 13). The > position will begin un September or October 2014. > > Applications, including CV, list of publications, research plan and > the names of two references including email addresses, should be sent > before December, 20 to > Frederique Bassino Frederique.Bassino(a)lipn.univ-paris13.fr > Sylvie Corteel corteel(a)liafa.univ-paris-diderot.fr > Philippe Marchal marchal(a)math.univ-paris13.fr > > Later applications will be considered until the position is filled. > > For further information do not hesitate to contact us. > > > -- > Frederique Bassino > > LIPN UMR 7030 Tel: +33 1 49 40 40 84 > Universite Paris 13 - CNRS Institut Galilee Bureau A104 > 99, avenue J.-B. Clement > 93430 Villetaneuse - FRANCE > _______________________________________________ > World mailing list > World(a)alea-research.eu > http://alea-research.eu/cgi-bin/mailman/listinfo/world

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Avviso di seminario :: Sartori@DSS (Scienze Statistiche, Sapienza)
by Pierpaolo Brutti 25 Nov '13

25 Nov '13

----------------------------------------------------------------------------- A v v i s o d i S e m i n a r i o ----------------------------------------------------------------------------- Venerdì 29 Novembre, ore 11am ----------------------------------------------------------------------------- Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma NICOLA SARTORI (Dip. di Scienze Statistiche, Università degli Studi di Padova) terrà un seminario dal titolo DIRECTIONAL INFERENCE FOR VECTOR PARAMETERS tutti gli interessati sono invitati a partecipare. ----------------------------------------------------------------------------- Maggiori informazioni sui seminari presso il DSS sono consultabili a quest'indirizzo: http://goo.gl/Y6OQYm Saluti Pierpaolo Brutti - Fulvio De Santis --- Summary We consider inference on a vector-valued parameter of interest in a linear exponential family, in the presence of a finite-dimensional nuisance parameter. Based on higher order asymptotic theory for likelihood, we propose a directional test whose p-value is computed using one-dimensional integration. For discrete responses this extends the development of Davison et al. (2006), and some of our examples concern testing in contingency tables. For continuous responses the work extends the directional test of Cheah et al. (1994). Examples and simulations illustrate the high accuracy of the method, which we compare with the usual likelihood ratio test and with an adjusted version due to Skovgaard (2001). In high-dimensional settings, such as covariance selection, the approach works essentially perfectly, whereas its competitors can fail catastrophically. Extensions to non-linear exponential families and to general models are also sketched (joint with A.C. Davison, D.A.S. Fraser, N. Reid).

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Seminario CARON
by Matteo Ruggiero 22 Nov '13

22 Nov '13

**************************************************************** STATISTICS SEMINARS - COLLEGIO CARLO ALBERTO **************************************************************** Venerdi' 29 novembre 2013, alle ore 12:00, presso la sala rossa del Collegio Carlo Alberto, Moncalieri (TO), si terra' il seguente seminario: François CARON (University of Oxford) A BAYESIAN NONPARAMETRIC MODEL FOR UNDIRECTED AND MULTI-EDGES NETWORKS Abstract: In this talk, I will present ongoing work on a Bayesian nonparametric specification for either undirected or multi-edge directed networks, building on the framework of completely random measures. The formulation allows for an unbounded number of nodes in the network, while encouraging a sparse set of interactions. Importantly, as demonstrated empirically, the model captures salient features of real world networks like power-law degree distributions with possible exponential cut-off in the tails. These properties, in addition to sparsity, are determined by three hyperparameters. I will also discuss an approach for scaling computations to large networks. This is joint work with Emily Fox (University of Washington). Tutti gli interessati sono invitati a partecipare. Il seminario e' organizzato dalla "de Castro" Statistics Initiative (http://www.carloalberto.org/stats) in collaborazione con il Collegio Carlo Alberto. Il programma dei seminari puo' essere consultato alla pagina http://www.carloalberto.org/events/seminars/statistics/ Cordiali saluti, Matteo Ruggiero --------- Matteo Ruggiero University of Torino & Collegio Carlo Alberto http://web.econ.unito.it/ruggiero

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Fwd: IWFOS 2014 - call-for-papers
by Aldo Goia 20 Nov '13

20 Nov '13

*Call for Papers - IWFOS 2014* *3rd International Workshop on * *Functional and Operatorial Statistics* Stresa (Italy) – June 19 – 21, 2014 Web-Site: http://iwfos2014.unipmn.it Apologies for cross-posting. Dear Colleagues, Dear Friends, We are glad in inviting you to participate in the program of the 3rd International Workshop on Functional and Operatorial Statistics by submitting an extended abstract. *CALL FOR PAPERS* We welcome proposals addressing “infinite dimensional statistical problems or methods” with special emphasis on: · Statistical modelling for functional variables, · Functional Data Analysis, · Operator-based Statistics, · Background for Statistics in infinite-dimensional spaces. For this third edition we wish to encourage also contributions in *Machine Learning* and in *High Dimensional Statistics* in order to further relations between all these different fields of modern statistics and to contribute to their future development. The extended abstracts (from 4 to 6 pages) should be formatted according to the author guidelines described in the web-site of the workshop and will have to uploaded using exclusively the dedicated submission form on the web-site. All the submitted works will be reviewed by experts selected by the Scientific Program Committee. The format of the workshop has not parallel sessions, and so a limited number of oral contributions (around 30) will be accepted. In addition, some contributions could also be accepted as posters. *DEADLINES* *January 15, 2014* Submission deadline. *March 31, 2014* Notification of Acceptance. *April 15, 2014 * Revised submission deadline. For organizing requirements, early submissions are encouraged and any postponement will not be granted after 15th January 2014. *INVITED SPEAKERS* · *BOENTE* Graciela (University of Buenos Aires, Argentina) · *CARDOT* Hervé (University of Bourgogne, France) · *FERRATY* Frédéric (University of Toulouse, France) · *van de GEER* Sara (ETH Zentrum, Zürich, Switzerland) · *GUO* Mengmeng (Southwestern University of Finance and Economics, P.R. China) · *HALL* Peter (University of Melbourne, Australia) · *HOERMANN* Siegfried (Université Libre de Bruxelles, Belgique) · *MARRON* Steve (University of North Carolina, USA) · *PATEIRO* Beatriz (University of Santiago de Compostela, Spain) · *SAMWORTH* Richard (University of Cambridge, UK) · *YAO* Fang (University of Toronto, Canada) *Scientific Program Committee* *Co-Chairs* GOIA Aldo (University of Piemonte Orientale, Italy) VIEU Philippe (University of Toulouse, France) *Members of the SPC* ASTON John (University of Warwick, England) DELAIGLE Aurore (University of Melbourne, Australia) CUESTA ALBERTOS Juan A. (University of Cantabria, Santander, Spain) FRAIMAN Ricardo (University of San Andrès, Buenos Aires, Argentina) HARDLE Wolfgang (Humboldt University, Berlin, Germany) HUSKOVA Marie (University of Prague, Czech Republic) van KEILEGOM Ingrid (Catholic University of Louvain, Belgium) KNEIP Alois (University of Bonn, Germany) GONZALEZ MANTEIGA Wenceslao (University of Santiago de Compostela, Spain) MÜLLER Hans George (University of California, Davis, USA) ROMAIN Yves (University of Toulouse, France) SECCHI Piercesare (Politecnico di Milano, Italy) WANG Naisyin (University of Michigan, USA) *Organizing Committee* SALINELLI Ernesto (Chair - University of Piemonte Orientale, Italy) BONGIORNO Enea Giuseppe (University of Piemonte Orientale, Italy) FERRATY Frédéric (University of Toulouse, France) GOIA Aldo (University of Piemonte Orientale, Italy) SANGALLI Laura (Politecnico di Milano, Italy) SARDA Pascal (University of Toulouse, France) VANTINI Simone (Politecnico di Milano, Italy) VIGUIER-PLA Sylvie (University of Toulouse, France) *PUBLICATIONS* A book of proceedings, containing the accepted oral/poster communications, will be given at each participant at the registration desk at the congress venue. This meeting will be the starting point for a Special Issue of the *Journal of Multivariate Analysis*. Best new advances on the prioritized areas of the meeting could be submitted to this Special Issue, but a standard full reviewing process according the standards of JMVA will be made. *CONTACTS* Dipartimento di Studi per l’Economia e l’Impresa (Di.S.E.I.) Università del Piemonte Orientale Via Perrone, 18 – 28100 Novara (Italy) fax: +39 0321 375305 - e-mail: iwfos2014(a)unipmn.it web-site: http://iwfos2014.unipmn.it Thank you for your attention, Hoping see you in Stresa, Sincerely Yours, On behalf of the organizers, Aldo Goia Ernesto Salinelli Philippe Vieu ======================================================= IWFOS.2014 Secretary Dipartimento di Studi per l'Economia e l'Impresa Università del Piemonte Orientale Via Perrone, 18 - 28100 Novara (Italy) iwfos2014(a)unipmn.it web-site: http://iwfos2014.unipmn.it -- Aldo Goia Dipartimento di Studi per l'Economia e l'Impresa Università del Piemonte Orientale "A. Avogadro" Via Perrone, 18 - 28100 Novara Tel. +39 0321 375319 - Fax. +39 0321 375305

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FW: Invitation to Aarhus Quant Factory - week 3, 2014
by Camilla Pisani 20 Nov '13

20 Nov '13

Di seguito inoltro l'invito per l' "Aarhus Quant Factory" che si terrá in Danimarca il prossimo Gennaio. Chiedo gentilmente di diffonderlo a chiunque possa essere interessato. Grazie. _____________________ Camilla Pisani HPCFinance project-Phd student Aarhus University Business and Social Sciences Fuglesangs Allé 4 8210 Aarhus V, Denmark T: +45 87166015 M: cpisani(a)econ.au.dk W: http://au.dk/en/ cpisani(a)econ.au.dk [bslogo_mail_equis_stor_uk] Business and Social Sciences is a broad business school constituting one of four new main academic areas at Aarhus University. Business and Social Sciences is the largest university unit within business and social sciences in Denmark, encompassing a wide range of academic disciplines, outstanding research environments and strong degree programmes. From: phd.econ [mailto:phd.econ-bounces@maillist.au.dk] On Behalf Of Susanne Christensen Sent: 20. november 2013 13:29 To: econ.econ(a)maillist.au.dk Subject: [econphd] [econ] Invitation to Aarhus Quant Factory - week 3, 2014 Dear PhD students, junior faculty and practitioner colleagues, The Finance Research Group at the Department of Economics and Business, Aarhus University hereby invites you to Aarhus Quant Factory<http://econ.au.dk/research/research-groups/finance-research-group-frg/aarhu…>, a series of events with focus on Quantitative Finance. Aarhus Quant Factory will take place at the Department of Economics and Business at Aarhus University, Denmark during January 14-17, 2014 and the scientific program will consist of: · 14 January: Understanding and Managing Model Risk<http://econ.au.dk/research/research-groups/finance-research-group-frg/aarhu…>, Intensive PhD course lectured by Massimo Morini, IMI Bank of Intesa San Paolo. · 15-16 January: Lectures on Capital requirements, Credit Risk, Collateral and Centralized clearing - How to avoid losing billions in fines while running your CVA calculations on an iPad Mini<http://econ.au.dk/research/research-groups/finance-research-group-frg/aarhu…>, Intensive PhD course lectured by Leif Andersen, Bank of America Merril Lynch, and Jesper Andreasen, Danske Bank. · 17 January: Aarhus Quant Day<http://econ.au.dk/research/research-groups/finance-research-group-frg/aarhu…>, Symposium featuring talks given by o Leif Andersen, Bank of America Merril Lynch o Jesper Andreasen, Danske Bank o Rama Cont, Imperial College, London. o Brian Huge, Danske Bank o Jan Kallsen , Christian Albrechts University, Kiel o Vladimir Piterbarg, Barclays o Chris Rogers, University of Cambridge o Wim Schoutens, Catholic University of Leuven A detailed program is attached to this email. Please feel free to distribute this invitation. We look forward to welcoming as many of you as possible. Med venlig hilsen / Best regards Elisa Nicolato Associate Professor T: +45 87164998 M: eln(a)asb.dk<mailto:eln@asb.dk> Thomas Kokholm Associate Professor T: +45 87165216 M: thko(a)asb.dk<mailto:thko@asb.dk> Aarhus University Business and Social Sciences Department of Economics and Business Fuglesangs Allé 4 DK-8210 Aarhus V venlig hilsen / kind regards ________________________________ Susanne Christensen PhD Support Tel.: +45 8716 5121 Mail: sla(a)asb.dk<mailto:sla@asb.dk> http://au.dk/sla@asb.dk Department of Economics and Business Aarhus University School of Business and Social Sciences Fuglesangs Allé 4, 2632/L126 8210 Aarhus V [cid:image001.png@01CEAA29.BFD4F9F0]

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Ph.D. Position at the University of Sussex, UK
by Enrico Scalas 19 Nov '13

19 Nov '13

Car* collegh*, invio questo messaggio con preghiera di ulteriore diffusione. Sto cercando candidature per il seguente progetto di dottorato: PhD studentship on models for non-stationary intra-day financial data. da svolgersi presso il Dipartimento di Matematica dell'Universita' del Sussex. Maggiori informazioni sono disponibili a questi siti: http://www.sussex.ac.uk/study/money/scholarships/pgr2013/view/287 http://www.jobs.ac.uk/job/AHO960/phd-studentship-on-models-for-non-stationa… Per richieste informali si puo' scrivere al sottoscritto: e.scalas(a)sussex.ac.uk Cordiali saluti Enrico Scalas

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Avviso di mini-corso :: Varin@DSS (Scienze Statistiche, Sapienza)
by Pierpaolo Brutti 19 Nov '13

19 Nov '13

----------------------------------------------------------------------------- A v v i s o d i M i n i - C o r s o ----------------------------------------------------------------------------- Lunedì, 25 November, ore 10:30-12:00 + 15:00-17:00 Martedì, 26 November, ore 10:30-12:00 ----------------------------------------------------------------------------- Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma CRISTIANO VARIN (Dep. of Environmental Sciences, Informatics and Statistics, Ca’ Foscari University) terrà un mini-corso rivolto principalmente (ma non solo) agli studenti di dottorato dal titolo ESTENSIONI E MODIFICHE DEL CONCETTO DI VEROSIMIGLIANZA Tutti gli interessati sono invitati a partecipare. ----------------------------------------------------------------------------- Questo corso fa parte delle attività promosse nell’ambito del FIRB Futuro in Ricerca 2012 “Modelli mistura e a variabili latenti per l'inferenza causale e l'analisi di dati socio-economici”. Maggiori informazioni sui seminari e mini-corsi presso il DSS sono consultabili a quest'indirizzo: http://goo.gl/Y6OQYm Saluti Pierpaolo Brutti --- Abstract A partire da Ronald Fisher, il concetto di funzione di verosimiglianza ha ricoperto un ruolo fondamentale nell'inferenza statistica. Vi è, però, una varietà di situazioni in cui il calcolo della funzione di verosimiglianza non è agevole oppure non è opportuno. In molti modelli per dati dipendenti la verosimiglianza è onerosa o addirittura impossibile da calcolare a causa delle presenza di matrici di covarianza di grandi dimensioni, di costanti di normalizzazione complesse o di integrali multidimensionali che non possono essere risolti in forma chiusa. Altre difficoltà nell'utilizzo della funzione di verosimiglianza provengono dalla presenza di parametri di disturbo di alta dimensionalità che non permettono una corretta inferenza sui parametri di interesse o dalla disponibilità di un elevato numero di potenziali regressori rispetto al numero di osservazioni. Per risolvere questi e altri problemi, sono state proposte in letteratura diverse estensioni e modifiche del concetto di verosimiglianza. L'obiettivo di questo corso è presentare una rassegna di alcune di queste modifiche, privilegiando le idee e le motivazioni che ne stanno alla base. Programma del corso - Richiami di inferenza di verosimiglianza - Inferenza di verosimiglianza per modelli mal specificati - Sovradispersione e quasi-verosimiglianza - Equazioni di stima generalizzate - Verosimiglianze composite - Verosimiglianze penalizzate per la scelta fra modelli

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Avviso di seminario :: Sangalli@DSS (Scienze Statistiche, Sapienza)
by Pierpaolo Brutti 18 Nov '13

18 Nov '13

---------------------------------------------------------------------------- - A v v i s o d i S e m i n a r i o ---------------------------------------------------------------------------- - Venerdì 22 Novembre, ore 11am ---------------------------------------------------------------------------- - Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma LAURA SANGALLI (MOX, Dip. di Matematica, Politecnico di Milano) terrà un seminario dal titolo STATISTICAL & NUMERICAL TECHNIQUES FOR SPATIAL FUNCTIONAL DATA ANALYSIS ---------------------------------------------------------------------------- - Maggiori informazioni sui seminari presso il DSS sono consultabili a quest'indirizzo: http://goo.gl/Y6OQYm Saluti Pierpaolo Brutti - Fulvio De Santis --- Summary I will present a novel class of models for the accurate estimation of surfaces and spatial fields, that merges advanced statistical methodology with numerical analysis techniques. Thanks to the combination of potentialities from these two scientific areas, the proposed class of models has important advantages with respect to classical techniques used in spatial data analysis. The models are able to efficiently deal with data distributed over irregularly shaped domains, including Riemannian manifold domains, only few methods existing in literature for this type of data structures. Moreover, they can incorporate problem-specific priori information about the spatial structure of the phenomenon under study, with a very flexible modeling of space variation, allowing naturally for anisotropy and non-stationarity. The models have a generalized additive framework with a regularizing term involving a differential quantity of the surface of spatial field to be estimated. The estimators have good inferential properties; moreover, thanks to the use of numerical analysis techniques, they are computationally highly efficient. The method is illustrated in various applied contexts, including data coming from eco-dopplers, three-dimensional angiographies and computational fluid dynamics simulations. The seminar is based on joint work with Laura Azzimonti, Bree Ettinger, Fabio Nobile, Simona Perotto, Jim Ramsay, Piercesare Secchi. This line of research is developed within the FIRB2008 Futuro in Ricerca research project SNAPLE (http://mox.polimi.it/users/sangalli/firbSNAPLE.html ).

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Seminario A. Bianchi a Modena
by GIOIA CARINCI 18 Nov '13

18 Nov '13

*Avviso Seminario* La Dott.ssa Alessandra Bianchi (Università di Padova) terrà un seminario Venerdì 22 Novembre alle ore 11:30 in Aula VII - Dipartimento di Scienze Fisiche, Informatiche e Matematiche - Edificio Matematica - Via Campi 213/B - Modena. Titolo del Seminario: "Random Walk in a one-dimensional Levy random environment" Abstract: In this talk we introduce a model for a one-dimensional Levy-Lorentz gas corresponding to a random walk in random environment on the line. The environment is provided by a renewal point process with inter-distances having a Levy-type distribution, that can be seen as a set of randomly arranged static scatterers. We investigate the quenched behavior of the walk in the case of inter-distances having finite mean but infinite variance and provide asymptotic results about its distribution and moments . In particular we show that, contrary to the annealed case, the quenched behavior of the motion is diffusive. This is a work in progress with G. Cristadoro, M. Lenci and M. Ligabò. L'evento è organizzato nell'ambito del progetto FIRB "Processi stocastici e sistemi di particelle interagenti": http://www.stochastics.unimore.it/firb/

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