{ "148369-21904024": { "datetime_modified":"20260603T120011", "datetime_start":"20260603T130000", "datetime_end":"20260603T190000", "has_end_time":1, "date_start":"2026-06-03", "date_end":"2026-06-03", "time_start":"13:00:00", "time_end":"19:00:00", "time_zone":"America\/Detroit", "event_title":"Summer Recording Session, June 3rd 1PM - 7PM", "occurrence_title":"", "combined_title":"Summer Recording Session, June 3rd 1PM - 7PM", "event_subtitle":"", "event_type":"Other", "event_type_id":"22", "description":"Come join us for our weekly summer recording sessions! Absolutely no experience necessary, just bring your passion for music and let us help you bring your ideas to life!\r\n\u00a0\r\n(for example studio time can include: working on a pre-fleshed out plan on the digital audio workstation, coming in with an instrument to record audio, just having a ~vague~ idea in your head and wanting somewhere to put it, humming a melody and letting us bring it to life, chatting about music, chatting about wolverine records, just chatting in general, etc- the sky is the limit!)", "occurrence_notes":null, "guid":"148369-21904024@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/148369", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"Winberg Audio Studio - Shapiro Library", "has_livestream":0, "cost":"", "tags":[], "website":"https:\/\/maizepages.umich.edu\/event\/12474199", "sponsors":[ { "group_name":"Maize Pages Student Organizations", "group_id":"2390", "website":"" } ], 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"building_name":"", "campus_maps_id":"", "room":"", "location_name":"Michigan Union", "has_livestream":0, "cost":"", "tags":["Sessions"], "website":"https:\/\/sessions.studentlife.umich.edu\/p\/track\/17173", "sponsors":[ { "group_name":"Sessions @ Michigan", "group_id":"4791", "website":"https:\/\/sessions.studentlife.umich.edu\/" } ], "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":21903827 } , "148339-21903956": { "datetime_modified":"20260519T101611", "datetime_start":"20260603T140000", "datetime_end":"20260603T160000", "has_end_time":1, "date_start":"2026-06-03", "date_end":"2026-06-03", "time_start":"14:00:00", "time_end":"16:00:00", "time_zone":"America\/Detroit", "event_title":"Design-Based Causal Inference for Clustered Randomized Experiments and Observational Studies", "occurrence_title":"", "combined_title":"Design-Based Causal Inference for Clustered Randomized Experiments and Observational Studies: Xinhe Wang", "event_subtitle":"Xinhe Wang", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Modern empirical research increasingly relies on comparative studies with complex designs, including stratified and clustered treatment assignment, multiple treatment arms, and observational samples. These features arise naturally in education, public health, policy evaluation, and many other fields, but they also complicate causal estimation and inference by undermining the validity for familiar estimators and standard errors.\n\nThe first part of the dissertation studies clustered randomized trials with heterogeneous cluster sizes. We show that the commonly used estimators that average stratum-specific treatment-control contrasts can be inconsistent for the average treatment effect in such settings, a problem that has received limited attention. We establish consistency of a simple alternative, the H\u00e1jek estimator, under standard asymptotic regimes, develop an asymptotically conservative variance estimator valid under arbitrary stratum sizes, and propose a score-type test with improved small- to moderate-sample performance.\n\nThe second part of the dissertation extends this framework to multi-arm stratified clustered experiments, where inference must account for not only treatment-versus-control comparisons, but also comparisons among active treatments. We show that regression adjustment admits a unified two-stage representation, allowing adjustment models to be fit on the full sample, a subset of units, or external data. We establish multivariate asymptotic theory for vectors of covariate-adjusted H\u00e1jek estimators and develop a covariance matrix estimator that is asymptotically conservative in the positive semidefinite order.\n\nThe third part of the dissertation connects design-based inference for randomized experiments with matched and stratified observational studies. We compare the observational assignment mechanism to an emulated stratified clustered randomized trial with the same realized blocking structure. Assuming sufficient within-block homogeneity in treatment propensities, we show that a sandwich-type variance estimator for the covariate-adjusted H\u00e1jek estimator is asymptotically conservative.\n\nTogether, these results provide a unified design-based framework for estimation and inference in randomized and observational comparative studies. The dissertation contributes both diagnostic insight, showing when common estimators fail, and constructive methodology for valid causal inference in complex empirical designs.", "occurrence_notes":null, "guid":"148339-21903956@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/148339", "building_id":"1000167", "building_name":"West Hall", "campus_maps_id":"163", "room":"438", "location_name":"West Hall", "has_livestream":0, "cost":"", "tags":["Dissertation"], "website":"", "sponsors":[ { "group_name":"Department of Statistics Dissertation Defenses", "group_id":"4045", "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":21903956 } , "147712-21901642": { "datetime_modified":"20260607T003041", "datetime_start":"20260603T140000", "datetime_end":"20260603T150000", "has_end_time":1, "date_start":"2026-06-03", "date_end":"2026-06-03", "time_start":"14:00:00", "time_end":"15:00:00", "time_zone":"America\/Detroit", "event_title":"Resume Lab", "occurrence_title":"", "combined_title":"Resume Lab", "event_subtitle":"", "event_type":"Careers \/ Jobs", "event_type_id":"2", "description":"*RSVP required to attend. Click \"Join Event\" here:\u00a0https:\/\/umich.joinhandshake.com\/edu\/events\/1943778Just getting started building a resume? Have a draft but not sure how to make it better? Want to learn about resources available to revise your resume? Wherever you\u2019re at Resume Lab is a great next step for you.\u00a0Get real-time, personalized support in a small group setting by checking out the Resume Lab.We will discuss and educate you on\u2026- Design andformat- Writing a great bullet point- Targeting your resumefor specific internships\/jobs\u00a0If you're a Graduate Studentor Recent Grad, please make a 1:1 appointment instead of attending the Lab because this event is designed for undergraduates.\u00a0Note:This event's information is shown in Handshake as well as on the Happening @ Michigan calendar so that it will be seen by a larger number of U-M Students.#UCC", "occurrence_notes":null, "guid":"147712-21901642@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/147712", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"", "has_livestream":0, "cost":"", "tags":[], "website":"", "sponsors":[ { "group_name":"University Career Center UCC", "group_id":"1140", "website":"http:\/\/careercenter.umich.edu" } ], "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":21901642 } , "148543-21904428": { "datetime_modified":"20260603T120017", "datetime_start":"20260603T163000", "datetime_end":"20260603T180000", "has_end_time":1, "date_start":"2026-06-03", "date_end":"2026-06-03", "time_start":"16:30:00", "time_end":"18:00:00", "time_zone":"America\/Detroit", "event_title":"ADHD Student Group Craft and Game Picnic", "occurrence_title":"", "combined_title":"ADHD Student Group Craft and Game Picnic", "event_subtitle":"", "event_type":"Social \/ Informal Gathering", "event_type_id":"19", "description":"Join the ADHD Student Group on the Diag for a craft \/ game picnic from 4:30pm - 6pm. Crafts, games, and snacks will be provided, but you're welcome to bring your own!\r\nWhere:The Diag - 913 S University Ave, Ann Arbor, MI 48109\nWhen: TODAY from 4:30pm - 6pm", "occurrence_notes":null, "guid":"148543-21904428@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/148543", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"The Diag", "has_livestream":0, "cost":"", "tags":[], "website":"https:\/\/maizepages.umich.edu\/event\/12481715", "sponsors":[ { "group_name":"Maize Pages Student Organizations", "group_id":"2390", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/06\/event_148543_original-3.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_thumb\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_2x\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_lightbox\/media\/attachments\/2026\/06\/event_148543_original-3.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2026\/06\/event_148543_original-3.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2026\/06\/event_148543_original-3.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2026\/06\/event_148543_original-3.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2026\/06\/event_148543_original-3.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_thumb\/media\/attachments\/2026\/06\/event_148543_original-3.png" }, "occurrence_count":1, "first_occurrence":21904428 } }