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X-WR-CALDESC:Events for CREST
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DTSTART:20260329T010000
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DTSTART:20261025T010000
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DTSTART;TZID=Europe/Helsinki:20260309T133000
DTEND;TZID=Europe/Helsinki:20260316T173000
DTSTAMP:20260710T005537
CREATED:20260212T083208Z
LAST-MODIFIED:20260212T083217Z
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SUMMARY:Xunyu Zhou (Columbia University) - Introduction to Continuous-Time Reinforcement Learning
DESCRIPTION:INTRODUCTION TO CONTINUOUS-TIME REINFORCEMENT LEARNING\nXUNYU ZHOU\nColumbia University\nIndustrial Engineering & Operations Research Department \nSchedule: \nMarch 9\, 2026 | 1:30PM – 5:30PM – Room 2006\nMarch 12\, 2026 | 1:30PM – 5:30PM – Room 2006\nMarch 16\, 2026 | 1:30PM – 5:30PM – Room 2006 \nContent:\nThis crash course covers fundamental theory and algorithms for reinforcement learning with continuous-time controlled diffusion processes\, which have been developed in the last five years. It includes the following topics.\n1. Exploration vs exploitation: relaxed control\, entropy regularization\, exploratory HJB equation and Gibbs measure.\n2. Gaussian exploration under linear-quadratic control: optimality of Gaussian exploration and cost of exploration.\n3. Temperature control of Langevin diffusions: simulated annealing for nonconvex optimization and optimal temperature control.\n4. Policy evaluation: martingale characterization\, martingale loss function and martingale orthogonality conditions.\n5. Policy gradient: policy gradient via policy evaluation\, and temporal difference learning. q-learning theory: generalized Hamiltonian and policy improvement\, Q-function and q-function\, martingale characterization of q-function. \nEvaluation: \nTake home project. \n
URL:https://crest.science/event/xunyu-zhou-columbia-university-introduction-to-continuous-time-reinforcement-learning/
CATEGORIES:Doctoral Courses,Finance
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BEGIN:VEVENT
DTSTART;TZID=Europe/Helsinki:20260312T120000
DTEND;TZID=Europe/Helsinki:20260312T133000
DTSTAMP:20260710T005537
CREATED:20260121T131159Z
LAST-MODIFIED:20260306T153153Z
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SUMMARY:Balazs KOVACS (Yale University) - "Political Polarization and Group Performance"
DESCRIPTION:Sociology Seminar \nTime: 12:00 pm – 13:30 pm\nDate: 12th of march\nRoom : 3049 \n  \nBalazs KOVACS (Yale University) – “Political Alignment and Performance: From Golf Courses to Startups\, Labs\, and Patents” \n  \nAbstract :  \nPolitical polarization increasingly shapes social and professional life\, yet its consequences for collaboration and performance remain underexplored. In this talk\, I present a research program examining how political alignment affects group composition and outcomes across multiple settings. I begin with two published studies. The first uses random assignment in professional golf to show that political heterogeneity in playing groups reduces individual performance\, with effects amplified during periods of high societal polarization. The second documents strong political homophily in entrepreneurial team formation and finds that politically heterogeneous founding teams face higher shutdown rates. I then present new evidence extending these ideas to academic science and technological innovation. Using voter registration data matched to US-based academics and inventors\, I examine political sorting in coauthorship and patent teams and evaluate how team political composition relates to downstream impact. The findings reveal consistent homophily patterns across contexts but divergent performance implications: politically heterogeneous academic teams produce less-cited and less breakthrough work\, while heterogeneous inventor teams receive more patent citations. I discuss potential explanations for these contrasting patterns and implications for understanding how political divisions shape knowledge production. \nZoom link : https://zoom.us/j/98362947914?pwd=0adEBE0LXXuI6aawZMi4L9qmw6tgSq.1 \n  \nOrganizers:\nPaola TUBARO (Pôle sociologie CREST) \nNicolas JULIA (Pôle sociologie CREST) \nPatrick PRÄG (Pôle sociologie CREST) \nSponsors:\nCREST \n
URL:https://crest.science/event/https-scholar-google-com-citationsuser9wnfv58aaaajhlen/
CATEGORIES:Seminars,Sociology
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DTSTART;TZID=Europe/Helsinki:20260312T121500
DTEND;TZID=Europe/Helsinki:20260312T133000
DTSTAMP:20260710T005537
CREATED:20260225T131316Z
LAST-MODIFIED:20260310T172506Z
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SUMMARY:Tommy ANDERSSON\, (Lund U) - " The Endogenous Architecture for  Two-Sided Matching Markets" Lars Ehlers\, Ryan Tierney\, Lars-Gunnar Svensson
DESCRIPTION:Séminaire Microéconomie : Tous les mercredis\nHeure : 12h15 – 13h30\nDate : 12/03/2026\nSalle : 3001 \n  \nTommy ANDERSSON (Lund U) – “The Endogenous Architecture for Two-Sided Matching Markets” Lars Ehlers\, Ryan Tierney\, Lars-Gunnar Svensson \nCV : We propose an endogenous architecture where a market designer can impose arbitrary restrictions on the price space\, the capacity structure\, the entitlement structure\, and the rationing system (the architectural components). This not only generates a specific matching model\, but it also endogenously generates an equilibrium concept\, a domain of preference profiles\, and a matching mechanism (the model architecture). For any imposed restrictions\, the endogenously generated mechanism is non-manipulable on the endogenously generated domain of preference profiles. The proposed endogenous architecture also resolve a puzzle in the market design by demonstrating that seemingly disparate matching models\, including many of the classic models\, are part of a the same unifying architecture. \n\nOrganisateurs : \nJulien COMBE (Pôle d’Economie du CREST)\n​​​​​​​​​​​​Yves Le YAOUANQ (Pôle d’Economie du CREST) \nCommanditaires :\nCREST \n
URL:https://crest.science/event/tommy-andersson-lund-u-the-endogenous-architecture-for-two-sided-matching-markets-lars-ehlers-ryan-tierney-lars-gunnar-svensson/
CATEGORIES:Microeconomics,Seminars
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