{ "134332-21874195": { "datetime_modified":"20250325T123849", "datetime_start":"20250416T143000", "datetime_end":"20250416T155000", "has_end_time":1, "date_start":"2025-04-16", "date_end":"2025-04-16", "time_start":"14:30:00", "time_end":"15:50:00", "time_zone":"America\/Detroit", "event_title":"EXPERIMENTALLY VALIDATING WELFARE EVALUATION OF SCHOOL VOUCHERS", "occurrence_title":"", "combined_title":"EXPERIMENTALLY VALIDATING WELFARE EVALUATION OF SCHOOL VOUCHERS: John Singleton, University of Rochester", "event_subtitle":"John Singleton, University of Rochester", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"We leverage a unique two-stage experiment that randomized access to private school vouchers across markets as well as students to estimate the revealed preference value of school choice. To do this, we estimate several choice models on data only from control markets before turning to the treatment data for model validation. This exercise reveals that a model where school choice is constrained by ability-to-pay achieves better out-of-sample fit but still underpredicts experimental take-up of the voucher offer. We then present evidence from treatment markets that: a) the voucher offer also induced search; and b) private schools used program surplus to incentivize enrollment. Further, we show that a unified model incorporating these features can explain both the control and treatment data patterns. Estimates from that model imply that a targeted voucher program would have a marginal value of public funds(MVPF) of at least 3.", "occurrence_notes":null, "guid":"134332-21874195@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/134332", "building_id":"1000154", "building_name":"Lorch Hall", "campus_maps_id":"88", "room":"201", "location_name":"Lorch Hall", "has_livestream":0, "cost":"", "tags":["Economics","Labor","seminar"], "website":"http:\/\/www.lsa.umich.edu\/econ", "sponsors":[ { "group_name":"Department of Economics", "group_id":"3302", "website":"http:\/\/www.lsa.umich.edu\/econ" }, { "group_name":"ISR-Zwerdling Seminar in Labor Economics", "group_id":"3551", "website":"" }, { "group_name":"Department of Economics Seminars", "group_id":"3566", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2025\/03\/event_134332_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2025\/03\/event_134332_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2025\/03\/event_134332_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2025\/03\/event_134332_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2025\/03\/event_134332_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2025\/03\/event_134332_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2025\/03\/event_134332_original-1.png" }, "occurrence_count":1, "first_occurrence":21874195 } , "134956-21875729": { "datetime_modified":"20250413T191549", "datetime_start":"20250416T143000", "datetime_end":"20250416T153000", "has_end_time":1, "date_start":"2025-04-16", "date_end":"2025-04-16", "time_start":"14:30:00", "time_end":"15:30:00", "time_zone":"America\/Detroit", "event_title":"Learning Seminar in Algebraic Combinatorics: Projective system of posets from set partitions", "occurrence_title":"", "combined_title":"Learning Seminar in Algebraic Combinatorics: Projective system of posets from set partitions: Amrita Acharyya", "event_subtitle":"Amrita Acharyya", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"It is known when we call a poset P, a P-chain permutational poset, given a subset of permutations\r\nP of the symmetric group S_n. In this work, we use the same idea to study subsets of words of length n,\r\nthat are not necessarily permutations, for example: especially when they are certain classes of restricted\r\ngrowth functions induced by set partitions in standard form over [n] = {1, 2 \u00b7 \u00b7 \u00b7 n}. Varying n only, and\r\nalso varying n and k (the number of blocks of the set partitions) simultaneously, we can show that those\r\nposets form a projective system of trees and lattices. These poset structures can be extended over signed\r\nrestricted growth functions for standard type B set partitions over \u3008n\u3009 = {\u22121, \u22122, \u00b7 \u00b7 \u00b7 n, 0, 1, 2 \u00b7 \u00b7 \u00b7 n} as\r\nwell. We investigate properties of the tree and lattice structures of these projective systems.", "occurrence_notes":null, "guid":"134956-21875729@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/134956", "building_id":"1000166", "building_name":"East Hall", "campus_maps_id":"53", "room":"4088", "location_name":"East Hall", "has_livestream":0, "cost":"", "tags":["Mathematics"], "website":"", "sponsors":[ { "group_name":"Learning Seminar in Algebraic Combinatorics - Department of Mathematics", "group_id":"4894", "website":"" }, { "group_name":"Department of Mathematics", "group_id":"3791", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21875729 } , "133721-21873481": { "datetime_modified":"20250311T161451", "datetime_start":"20250416T150000", "datetime_end":"20250416T180000", "has_end_time":1, "date_start":"2025-04-16", "date_end":"2025-04-16", "time_start":"15:00:00", "time_end":"18:00:00", "time_zone":"America\/Detroit", "event_title":"ASC Winter 2025 UMAPS Research Colloquium Series. Cultural Dynamics and Social Transformation: Exploring Identity, Expression, and Resilience in Africa (Group 3)", "occurrence_title":"", "combined_title":"ASC Winter 2025 UMAPS Research Colloquium Series. Cultural Dynamics and Social Transformation: Exploring Identity, Expression, and Resilience in Africa (Group 3): Bukola Ochei, Arlette Bessomo, Victor Gwande, Clint Abrahams", "event_subtitle":"Bukola Ochei, Arlette Bessomo, Victor Gwande, Clint Abrahams", "event_type":"Conference \/ Symposium", "event_type_id":"5", "description":"This series features the Winter 2025 U-M African Presidential Scholars (UMAPS) fellows and their scholarly work. The talks prepared and presented by each visiting scholar are designed to promote dialogue on topics and to share their research with the larger U-M community.\r\n \r\n Speakers and Topics\r\n \r\n 1. Bukola Ochei - Nigeria\r\n \"The Religious, Cultural, Social, Criminal And Human Rights Dimensions Of Cross-Dressing In Nigeria\"\r\n \r\n 2. 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This may be in part due to the expense of the apparatus needed and in part because we work in a target-rich environment with many viewpoints and a large periodic table. I purchased a Walker type synthetic system about 30 years ago that, in recent years especially, has been worth the trouble it takes to use it. The pressure is relatively low in such systems compared to what one gets in a diamond cell, but the sample volumes are much larger. The system was purchased from a small company called Rockland Research, run by Peter McNutt, who, if I understand correctly, was one of the former group members of David Walker himself. Our Depths of the Earth system, although nominally easier to use, is in fact not easier to prepare samples for, and might be the only thing in my lab that I ever discarded out of frustration.\r\n\r\nSeveral postdoctoral fellows and graduate students have succeeded in finding new materials in our system or modifying it, but the major successes in recent years has been due to the patience and synthetic skill of my former postdoctoral fellow now lab manager Danrui Ni. Many new materials, including oxides chalcogenides and halides have been found in our system, and it is my intention to describe enough of our work in the latter two categories of materials to give interested audience members ideas about what works at applied pressures up to 6 GPa and what doesn\u2019t.", "occurrence_notes":null, "guid":"134586-21874564@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/134586", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"340", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Science","Physics"], "website":"", "sponsors":[ { "group_name":"Department Colloquia", "group_id":"3804", "website":"" }, { "group_name":"Department of Physics", "group_id":"1965", "website":"" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", 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