April 2023 - Random - Mailing list — Dipartimento di Matematica, UniPI

Concorso da RTDb di MAT/06 a Padova - scadenza 25/8/2016
by Marco Ferrante 25 Jun '24

25 Jun '24

Cari colleghi, vi segnalo che il Dipartimento di Matematica dell'Università di Padova ha bandito un posto di ricercatore di tipo B nel settore MAT/06. Il bando è disponibile alla pagina http://www.math.unipd.it/it/news/?id=1898 La scadenza per la presentazione delle domande è il 25 agosto 2016. Marco Ferrante

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LTI@UniTO seminars | Christopher Polk, May 2nd and Andrea Tamoni, May 3rd @12.00
by Luca Regis 24 Jun '23

24 Jun '23

Dear Colleagues, it is my pleasure to invite you to the following two seminars in Quantitative Finance, organised by LTI@UniTO (www.carloalberto.org/lti) and Collegio Carlo Alberto (CCA), which will take place at CCA in Torino and can be followed via Zoom. At the event page link you can find the paper, the zoom link to attend online and a button to add the event to your calendars. ------------------------------------------------------------------------------------------- May 2nd @ 12.00 Speaker: Christopher Polk (LSE) Title: The Day Destroys the Night, Night Extends the Day: A Clientele Perspective on Equity Premium Variation Abstract: We decompose market returns into their overnight and intraday components, which dramatically improves equity premium forecasts. Past smoothed overnight market returns strongly negatively forecast subsequent close-to-close returns (quarterly R2 of over 14%), primarily through intraday mean reversion. In contrast, past smoothed intraday market returns strongly positively forecast subsequent overnight returns; this partially-offsetting effect explains PE’s relatively poor forecasting ability (R2 only 3%). Our decomposition also resurrects the conditional CAPM: If we allow market betas to vary with past smoothed overnight returns, the four Fama-French factors’ alphas decrease on average by 84%. We interpret these return patterns through a clientele perspective. First, individual investor expectations and consumption growth strongly positively forecast overnight market returns, while intermediary risk tolerance strongly negatively forecasts intraday market returns. Second, aggregate cash-flow news occurs primarily intraday and is positively (negatively) correlated with revisions in expected future overnight (intraday) returns. Finally, while the Tech boom, Covid crash/rebound, and patterns in meme stocks were primarily driven by overnight returns, the Global Financial Crisis was mostly an intraday phenomenon. Event webpage link: https://www.carloalberto.org/event/christopher-polk-london-school-of-econom… Zoom link: https://us02web.zoom.us/j/83709123462pwd=OWpUM0VvRVNzbTN0bUJlRVVsNzA4Zz09 ------------------------------------------------------------------------------------------------------------------------------ May 3rd @ 12.00 Speaker: Andrea Tamoni (Rutgers Business School) Title: Stock Demand and Price Impact of 401(k) Plans Abstract: We estimate a demand system linking 401(k) plans ownership of individual stocks and funds to their demand for equities, and quantify the effect of 401(k) assets on fund managers’ investment behavior. We find that 401(k) fund and stock ownership are the most important variables, after size, explaining fund demand for stocks, with a one standard deviation increase in 401(k) ownership leading to 15-30% increase in stock demand. Funds managing a larger fraction of 401(k) assets tilt their portfolios toward winners, high beta and long duration stocks, outperforming their benchmarks. This investment behavior has important implications for security pricing and generate a feedback effect if pension flows respond positively to relative fund returns. Lastly, we estimate the equilibrium price impact of a change in 401(k) ownership to be positive and increasing over time, consistent with the shift from active to passive investing. Event webpage link: https://www.carloalberto.org/event/andrea-tamoni-rutgers-business-school/ Zoom link: https://us02web.zoom.us/j/83937896694?pwd=MVFoN2VudVM4a2Y5OXFvaklTRS85Zz09 Best regards, Luca Regis -- Luca Regis Associate Professor ESOMAS Department, University of Torino Affiliate, Collegio Carlo Albertosites.google.com/view/lucaregis Office: +39 011 670 6065www.carloalberto.org/lti

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PhD call
by Irene Crimaldi 24 May '23

24 May '23

Dear all, IMT Lucca offers a PhD program in Economics, Analytics and Decision Sciences (EADS <https://eads.imtlucca.it/>) . The program trains students to do cutting-edge research in various economic and social disciplines with a multidisciplinary approach based on statistics and data science. IMT is a highest-rated graduate school in Europe and offers full funding, free accommodation, meals, and full access to the campus to its students. Opportunities for joint supervision and studying abroad are also available. All candidates with training in areas such as economics, management, statistics, law, physics, computer science, engineering, logic and philosophy of science, mathematics, cognitive and behavioral sciences are welcome to apply. Deadline*: June 19, 2023.* More info: https://eads.imtlucca.it/how-to-apply Would you be so kind as to diffuse the call to your network? Thank you for your collaboration. Sincerely, Irene Crimaldi Associate Professor of Statistics IMT School for Advanced Studies Lucca Piazza San Francesco 55100 Lucca (Italy)

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Seminar by Katia Colaneri in Milan (25.01.23)
by Valeria Bignozzi 23 May '23

23 May '23

Dear all, you're invited to the seminar that will take place, in hybrid mode, at the Department of Statistics and Quantitative Methods, University of Milano-Bicocca. More details: • Speaker: Katia Colaneri (email: katia.colaneri(a)uniroma2.it <mailto:katia.colaneri@uniroma2.it>) Title: Some Optimisation Problems in Insurance with a Terminal Distribution Constraint Abstract: In this paper, we study two optimisation settings for an insurance company, under the constraint that the terminal surplus at a deterministic and finite time T follows a normal distribution with a given mean and a given variance. In both cases, the surplus of the insurance company is assumed to follow a Brownian motion with drift. First, we allow the insurance company to pay dividends and seek to maximise the expected discounted dividend payments or to minimise the ruin probability under the terminal distribution constraint. Here, we find explicit expressions for the optimal strategies in both cases, when the dividend strategy is updated at discrete points in time and continuously in time. Second, we let the insurance company buy a reinsurance contract for a pool of insured or a branch of business. We only allow for piecewise constant reinsurance strategies producing a normally distributed terminal surplus, whose mean and variance lead to a given Value at Risk or Expected Shortfall at some confidence level α. We investigate the question which admissible reinsurance strategy produces a smaller ruin probability, if the ruin-checks are due at discrete deterministic points in time. This presentation is based on a joint work with Julia Eisenberg (TU Vienna) and Benedetta Salterini (University of Firenze) Seminar venue: University of Milano-Bicocca Department of Statistics and Quantitative Methods Aula Seminari 4026, 4th floor, Building U7 January 25th, 4:30 pm Webex Link : https://unimib.webex.com/unimib/j.php?MTID=m40cd4bb0d7bb8035ca68f3821f453b33 <https://unimib.webex.com/unimib/j.php?MTID=m40cd4bb0d7bb8035ca68f3821f453b33> Join by meeting number Meeting number (access code): 2743 983 3965 Meeting password: c2uJfPBVe83 (22853728 from phones) Best regards, Valeria

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Expression of interest, LUISS junior positions in Mathematics
by Sara 10 May '23

10 May '23

Dear all, Luiss University is seeking candidates for a Junior position in Mathematics Applied to Economics and Finance. We invite all interested researchers to express their interest as soon as possible, possibly by mid January 2023. On the basis of the results of the call we will decide which type of Junior position to announce officially (in particular if tenure track or not). Candidates should have a solid knowledge of advanced mathematical tools and the clear attitude to apply such tools to some of the following areas: economics, management, finance, insurance, decision theory, game theory, and social sciences in general. See the link https://www.luiss.edu/call-expression-interest-2022/assistant-professor-of-… All the best wishes for the New Year, Sara Biagini e Fausto Gozzi -- Sara Biagini, Professor of Mathematical Finance Department of Economics and Finance LUISS Guido Carli https://www.luiss.it/ Address: Viale Romania, 32 - 00197 Roma Web: http://sites.google.com/site/sarabiagini/

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(PMS)^2 talk: J.-D. Deuschel [4 May] at UniMIB
by Maurizia Rossi 03 May '23

03 May '23

Dear colleagues, We are happy to announce the following *hybrid* - that is, in person with online streaming - talk: Speaker: *Jean-Dominique Deuschel* (TU Berlin) *Title: *An isomorphism theorem for Ginzburg-Landau interface models and scaling limits. (See Abstract below.) *Date and Time:* Thursday May 4, 16:30-17:30 (Rome time zone). Place: *Aula 3014, Dip. di Matematica e Applicazioni, Univ. di Milano-Bicocca*, Via R. Cozzi 55, Milano. *Webex link:* https://unimib.webex.com/unimib-it/j.php?MTID=mc07da73e64ea2eb0da78975bc808… *Meeting number:* 2741 491 0178*Password: *HPxNQASR579 (47967277 for phones) %%%%%%%%%% *Abstract: *We introduce a natural measure on bi-infinite random walk trajectories evolving in a time-dependent environment driven by the Langevin dynamics associated with a gradient Gibbs measure with convex potential. We derive an identity relating the occupation times of the Poissonian cloud induced by this measure to the square of the corresponding gradient field, which - generically - is not Gaussian. In the quadratic case, we recover a well-known generalization of the second Ray-Knight theorem. We further determine the scaling limits of the various objects involved in dimension 3, which are seen to exhibit homogenization. In particular, we prove that the renormalized square of the gradient field converges under appropriate rescaling to the Wick-ordered square of a Gaussian free field on R^3 with suitable diffusion matrix, thus extending a celebrated result of Naddaf and Spencer regarding the scaling limit of the field itself. (Based on joint work with Pierre-François Rodriguez.) %%%%%%%%%%% This talk is part of the *(PMS)^2: Pavia-Milano Seminar series on Probability and Mathematical Statistics* organized jointly by the universities Milano-Bicocca, Pavia, Milano-Politecnico. Participation is free and welcome! Best regards The organizers (Carlo Orrieri, Maurizia Rossi, Margherita Zanella) -- Maurizia Rossi Dipartimento di Matematica e Applicazioni Università degli Studi di Milano-Bicocca https://mauriziarossi.wordpress.com

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De Finetti Risk Seminar - May 3, 2023
by Emanuela Rosazza Gianin 29 Apr '23

29 Apr '23

On behalf of the Scientific Committee of the "B. de Finetti Risk Seminars, Milano Lectures on the Mathematical Theory of Economics and Finance”, we are glad to invite you to participate at the following Lecture: Jean-Pierre Fouque University of California Santa Barbara Title: Reinforcement Learning Algorithm for Mixed Mean Field Control Games Abstract: We present a new combined Mean Field Control Game (MFCG) problem which can be interpreted as a competitive game between collaborating groups and its solution as a Nash equilibrium between the groups. Within each group the players coordinate their strategies. An example of such a situation is a modification of the classical trader's problem. Groups of traders maximize their wealth. They are faced with transaction cost for their own trades and a cost for their own terminal position. In addition they face a cost for the average holding within their group. The asset price is impacted by the trades of all agents. We propose a reinforcement learning algorithm to approximate the solution of such mixed Mean Field Control Game problems. We test the algorithm on benchmark linear-quadratic specifications for which we have analytic solutions. Joint work with A. Angiuli, N. Detering, Mathieu Laurière, and J. Lin. LOCATION: The seminar will be held on *May 3, *2023 at *18.00,* Aula Di Rappresentanza, Dipart. Matematica, Università di Milano, Via Saldini 50, Milano. Scientific Committee Prof. Simone Cerreia-Voglio (Univ. Bocconi) Prof. Marco Frittelli (Univ. degli Studi di Milano) Prof. Fabio Maccheroni (Univ. Bocconi) Prof. Marco Maggis (Univ. degli Studi di Milano) Prof. Massimo Marinacci (Univ. Bocconi) Prof. Emanuela Rosazza Gianin (Univ. Milano-Bicocca) ****************************************** Emanuela Rosazza Gianin Dipartimento di Statistica e Metodi Quantitativi Università di Milano-Bicocca Edificio U7 – 4° Piano Via Bicocca degli Arcimboldi, 8 20126 Milano Tel. 02 64483208 e-mail: emanuela.rosazza1(a)unimib.it ******************************************

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Workshop "Stochastic Models for Complex Systems" - PRIN 2017
by Fabrizio, Antonio DURANTE 29 Apr '23

29 Apr '23

Dear Colleagues, we are pleased to announce the final workshop of the PRIN 2017 project “Stochastic Models for Complex Systems" that will take place on May 18th-19th, 2023 in Lecce, piazza Tancredi 7. For more information, please visit http://sites.google.com/view/smocs2023 Participation is free of charge, but registration is mandatory. The registration deadline is May 5th 2023 (Friday) at 12:00. Best regards Fabrizio Durante (On behalf of Organizing Committee) --------------------------------------------------------- Fabrizio Durante Dipartimento di Scienze dell'Economia Centro Ecotekne Pal. C S.P. 6, Lecce - Monteroni LECCE (ITALY) Phone: +39 0832 29 8672 https://sites.google.com/site/fbdurante/ --

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Seminar Prof. F. Patras at Università degli Studi di Milano
by Stefania Ugolini 28 Apr '23

28 Apr '23

Professor F. Patras (Univ. Côte d’Azur, CNRS) will give a seminar on Thursday, May 04th at 15:00, in Aula Dottorato, at the Department of Mathematics "Federigo Enriques", Università degli Studi di Miano. Title: "Wick polynomials, from classical to free probability." Abstract: Wick polynomials are a central object in quantum physics and classical probability (where they encode for example "chaos decompositions" - they provide an orthonormal basis of the space of square integrable functions of a Gaussian random variable). We will discuss an algebraic formulation of Wick's constructions that allows to generalize them to a wide variety of contexts, featuring free probability - a probability theory closely linked to random matrices but that appears in various recent works, in different areas. Stefania Ugolini (University of Milan) Francesco De Vecchi (University of Pavia)

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PhD in Economics at Ca' Foscari University of Venice
by Roberto CASARIN 28 Apr '23

28 Apr '23

Dear Colleague, this is to inform you that the call for applications for the PhD in Economics at Ca' Foscari University of Venice is now open and published here: https://www.unive.it/pag/43333/ <https://www.unive.it/pag/43333/> [ITALIAN] https://www.unive.it/pag/43334/ [ENGLISH] We offer *7 positions with fully funded scholarships for 4** years *starting from September 2023. The amount of a scholarship is about 20.000 euros gross/year. From the first year, PhD students have 1624,30 euros/year to spend for conference participation or summer/winter schools. Deadline to apply: *May 31st 2023 at 1:00 PM (Italian time)*. *Join us for an information session on Zoom on Monday May 15th 2023 at 4:00pm* (CEST) and get to know our world-class program, faculty, placement and more. Sign up now to register and receive access to the event: https://unive.zoom.us/meeting/register/tZYtc-GsrToqG9OaVHw0PAx-XFJx96SThH6P You will receive an email of confirmation with the codes to enter the meeting. INOMICS: https://inomics.com/program/4-year-phd-economics-1447778 For information on the PhD programme in Economics: http://www.unive.it/phd-economics <http://www.unive.it/phdeconomics> For information on the call and procedures to apply, please contact: phd.application(a)unive.it - in twitter https://twitter.com/DipEcoUnive/status/1651556947898900480 - in instagram https://www.instagram.com/p/CrigF9ZIsw1 - in facebook https://www.facebook.com/photo/?fbid=813260863633324&set=a.613776353581777 Best regards, ********************************************************************************************** Cara/o Collega, Ti scrivo per segnalare l'apertura del bando per il programma di dottorato in Economics offerto dal Dipartimento di Economia dell'Università Ca’ Foscari di Venezia. Quest'anno sono disponibili 7 posti con borsa quadriennale (circa 20.000 € annui per l'intera durata del dottorato), più un posto per studenti stranieri in possesso di borsa di studio propria. Il bando si chiude il *31 maggio 2023 alle 13:00, ora italiana*. Il dottorato ambisce a preparare un gruppo selezionato di studenti per la carriera accademica, ma anche per ricoprire posizioni nei settori della ricerca di organizzazioni internazionali, istituzioni pubbliche, imprese private, banche centrali e istituzioni finanziarie. L'ampio spettro di interessi di ricerca e la reputazione internazionale della faculty di area economica e quantitativa di Ca’ Foscari, così come il ricco programma di seminari e workshop di livello internazionale organizzati in dipartimento permettono agli studenti di lavorare in un ambiente stimolante per tutta la durata del corso di dottorato. Gli studenti ricevono adeguato supporto, anche economico, per partecipare a conferenze e workshop internazionali e per poter competere sul job market internazionale. Il *15 maggio alle ore 16:00 in Zoom è organizzato un incontro informativo sul dottorato*. E' richiesta la registrazione: https://unive.zoom.us/meeting/register/tZYtc-GsrToqG9OaVHw0PAx-XFJx96SThH6P Il bando è disponibile a questo link: https://www.unive.it/pag/43334/ Informazioni dettagliate sul PhD in Economics di Ca’ Foscari: http://www.unive.it/phdeconomics INOMICS: https://inomics.com/program/4-year-phd-economics-1447778 In allegato un pieghevole con le informazioni essenziali sul dottorato. - in twitter https://twitter.com/DipEcoUnive/status/1651556947898900480 - in instagram https://www.instagram.com/p/CrigF9ZIsw1 - in facebook https://www.facebook.com/photo/?fbid=813260863633324&set=a.613776353581777 Qualsiasi richiesta di informazioni riguardo il programma può essere rivolta alla Segreteria del dottorato all'indirizzo: sse(a)unive.it Cordiali saluti

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