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  2. Sensitivity Analysis with the $R^2$-calculus | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/publication/r2-calculus/
    3 Jun 2024: Search. Sensitivity Analysis with the $R2$-calculus. Tobias Freidling, Qingyuan Zhao. January 2023R$-sensitivity contours for the lower end of the estimated partially identified region. Abstract. Causal inference necessarily relies upon untestable

  3. Multiple conditional randomization tests | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/publication/multiple-crts/
    3 Jun 2024: Search. Multiple conditional randomization tests. Yao Zhang, Qingyuan Zhao. April 2021Abstract. We propose a general framework for (multiple) conditional randomization tests that incorporate several important ideas in the recent literature. We

  4. Bayesian Statistics | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/bayesian-statistics/
    3 Jun 2024: Search. Bayesian Statistics. Letter to the editor: Generation interval for COVID-19 based on symptom onset data. The purpose of this letter is to raise a few issues with the methodology of a recent paper by Ganyani et al. [1], which aimed to

  5. On testing mean proportionality of multivariate normal variables |…

    https://www.statslab.cam.ac.uk/~qz280/publication/proportionality-testing/
    3 Jun 2024: Search. On testing mean proportionality of multivariate normal variables. Etaash Katiyar, Qingyuan Zhao. March 2021Abstract. This short note considers the problem of testing the null hypothesis that the mean values of two multivariate normal

  6. Infectious-Diseases | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/infectious-diseases/
    3 Jun 2024: Search. Infectious-Diseases. To be read before The Royal Statistical Society at the Society's 2021 annual conference held in Manchester on Wednesday, September 8th, 2021, the President, Professor Sylvia Richardson, in the Chair. Letter to the editor:

  7. C. Mary Schooling | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/c.-mary-schooling/
    3 Jun 2024: Search. C. Mary Schooling. Latest. Mendelian randomization. 2024. Powered by the Academic theme forCite.

  8. Michael V. Holmes | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/michael-v.-holmes/
    3 Jun 2024: Search. Michael V. Holmes. Latest. Mendelian randomization. 2024. Powered by the Academic theme forCite.

  9. Causal Inference (Part III, Michaelmas 2023) | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/teaching/causal-2023/
    3 Jun 2024: Search. Causal Inference (Part III, Michaelmas 2023). 2023-10-05. This is a 16-lecture course on causal inference, the statistical science of drawing causal conclusions from experimental and non-experimental data. [Updated: <2023-11-23 Thu>].

  10. Randomization (project page) | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/project/randomization/
    3 Jun 2024: Search. Randomization (project page). 2022-04-22. A related page isRelated. Publications. Selective Randomization Inference for Adaptive Experiments. We apply ideas from post-selection inference to randomization tests for adaptive experiments.

  11. Sensitivity analysis for observational studies | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/yale-biostats-2020-2/
    3 Jun 2024: Search. Sensitivity analysis for observational studies. Abstract. Sensitivity analysis is widely recognized as a critical step in an observational study but is seldom found in applications. One reason for its underuse is the various forms of model,

  12. A unified analysis of regression adjustment in randomized experiments …

    https://www.statslab.cam.ac.uk/~qz280/publication/regression-adjustment/
    3 Jun 2024: Search. A unified analysis of regression adjustment in randomized experiments. Katarzyna Reluga, Ting Ye, Qingyuan Zhao. October 2022Abstract. Regression adjustment is broadly applied in randomized trials under the premise that it usually improves

  13. Two-sample instrumental variable analyses using heterogeneous samples …

    https://www.statslab.cam.ac.uk/~qz280/publication/two-sample-iv/
    3 Jun 2024: Search. Two-sample instrumental variable analyses using heterogeneous samples. Qingyuan Zhao, Jingshu Wang, Wes Spiller, Jack Bowden, Dylan Small. August 2017Abstract. Many modern IV studies (especially Mendelian Randomization) are carried out with

  14. Fun-Posts | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/fun-posts/
    3 Jun 2024: Search. Fun-Posts. Amusing counterfactual inference (by words). My good friend Joshua Loftus and I spent some 30 minutes to crack (at least we think we did!) a counterfactual inference made in a speech in the House of Commons in London in 1850 by

  15. Bo Zhang | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/bo-zhang/
    3 Jun 2024: Search. Bo Zhang. Latest. Selecting and ranking individualized treatment rules with unmeasured confounding. 2024. Powered by the Academic theme forCite.

  16. Sensitivity analysis via stochastic programming | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/icsds-2023/
    3 Jun 2024: Search. Sensitivity analysis via stochastic programming. Date. 2023-12-20 1:10 PM — 1:30 PM. Location. Lisbon, Portugal. 2024. Powered by the Academic theme forCite.

  17. Amanda Ly | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/amanda-ly/
    3 Jun 2024: Search. Amanda Ly. Latest. Mendelian randomization with coarsened exposures. 2024. Powered by the Academic theme forCite.

  18. BETS: The dangers of selection bias in early analyses of the…

    https://www.statslab.cam.ac.uk/~qz280/publication/covid-19-bets/
    3 Jun 2024: Search. BETS: The dangers of selection bias in early analyses of the coronavirus disease (COVID-19) pandemic. Qingyuan Zhao, Phyllis Ju, Sergio Bacallado, Rajen Shah. April 2020Abstract. We developed a generative model for key epidemiological events

  19. On sensitivity value of pair-matched observational studies | Qingyuan …

    https://www.statslab.cam.ac.uk/~qz280/publication/sensitivity-value/
    3 Jun 2024: Search. On sensitivity value of pair-matched observational studies. February 2017Abstract. A crucial quantity in Rosenbaum’s sensitivity analysis is the ‘sensitivity value’, the amount of unmeasured confounding needed to alter the qualitative

  20. How infectious was COVID-19 when it first circulated in Wuhan? |…

    https://www.statslab.cam.ac.uk/~qz280/talk/corpus-masterclass-2022/
    3 Jun 2024: Search. How infectious was COVID-19 when it first circulated in Wuhan? Abstract. This is given to A-level students. Date. 2022-03-24 2:00 PM — 2:45 PM. Location. Corpus Christi College Masterclass in Mathematics. 2024. Powered by the Academic

  21. Sensitivity Analysis | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/sensitivity-analysis/
    3 Jun 2024: Search. Sensitivity Analysis. A new approach to sensitivity analysis in linear SEMs using stochastic optimization and the $R2$-calculus. Sensitivity analysis is widely recognized as a critical step in an observational study but is seldom found in

  22. Toward Better Practice of Covariate Adjustment in Analyzing…

    https://www.statslab.cam.ac.uk/~qz280/publication/covariate-adjustment/
    3 Jun 2024: Search. Toward Better Practice of Covariate Adjustment in Analyzing Randomized Clinical Trials. Ting Ye, Jun Shao, Yanyao Yi, Qingyuan Zhao. September 2020Abstract. In randomized clinical trials, adjustments for baseline covariates at both design

  23. Fabiola Del Greco M | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/fabiola-del-greco-m/
    3 Jun 2024: Search. Fabiola Del Greco M. Latest. Improving the accuracy of two-sample summary data Mendelian randomization: moving beyond the NOME assumption. 2024. Powered by the Academic theme forCite.

  24. Causal mediation analysis for time-varying heritable risk factors…

    https://www.statslab.cam.ac.uk/~qz280/publication/mr-lifecourse/
    3 Jun 2024: Search. Causal mediation analysis for time-varying heritable risk factors with Mendelian Randomization. Zixuan Wu, Ethan Lewis, Qingyuan Zhao, Jingshu Wang. February 2024Abstract. Understanding the causal pathogenic mechanisms of diseases is crucial

  25. Comment: Will competition-winning methods for causal inference also…

    https://www.statslab.cam.ac.uk/~qz280/publication/acic-competition-comment/
    3 Jun 2024: Search. Comment: Will competition-winning methods for causal inference also succeed in practice? Qingyuan Zhao, Luke Keele, Dylan Small. November 2018Abstract. This is an invited commentary for Statistical Science on the causal inference data

  26. Wenjie Hu | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/wenjie-hu/
    3 Jun 2024: Search. Wenjie Hu. Latest. A constructive approach to selective risk control. 2024. Powered by the Academic theme forCite.

  27. Weijie Su | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/weijie-su/
    3 Jun 2024: Search. Weijie Su. Latest. Multiple testing when many $p$-values are uniformly conservative. 2024. Powered by the Academic theme forCite.

  28. Zixuan Wu | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/zixuan-wu/
    3 Jun 2024: Search. Zixuan Wu. Latest. Causal mediation analysis for time-varying heritable risk factors with Mendelian Randomization. 2024. Powered by the Academic theme forCite.

  29. Yanyao Yi | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/yanyao-yi/
    3 Jun 2024: Search. Yanyao Yi. Latest. Toward Better Practice of Covariate Adjustment in Analyzing Randomized Clinical Trials. 2024. Powered by the Academic theme forCite.

  30. Zhen Miao | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/zhen-miao/
    3 Jun 2024: Search. Zhen Miao. Latest. A Mendelian randomization study of the role of lipoprotein subfractions in coronary artery disease. 2024. Powered by the Academic theme forCite.

  31. Design: The Elusive Principle of Statistics | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/oxford-2024/
    3 Jun 2024: Search. Design: The Elusive Principle of Statistics. Date. 2024-03-07 1:00 PM — 2:00 PM. Location. University of Oxford. 2024. Powered by the Academic theme forCite.

  32. Zijun Gao | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/zijun-gao/
    3 Jun 2024: Search. Zijun Gao. Latest. 2024. Powered by the Academic theme forCite.

  33. Fisher | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/fisher/
    3 Jun 2024: Search. Fisher. Discussion on (quasi-)randomization inference. The following is an email exchange with Hyunseung Kang on the nature of randomization inference. This was sparked by a couple of papers by David Freedman and David Lane: A Nonstochastic

  34. Tom Palmer | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/tom-palmer/
    3 Jun 2024: Search. Tom Palmer. Latest. Mendelian randomization. 2024. Powered by the Academic theme forCite.

  35. Mendelian randomization: A tutorial | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/mr-tutorial/
    3 Jun 2024: Search. Mendelian randomization: A tutorial. Abstract. Tutorial talk for the theory, methods, and practice of Mendelian randomization. Date. 2019-07-12. Event. Causal Inference Summer Institute 2019. Location. Rutgers University, School of Public

  36. Estimation and prediction in sparse and unbalanced tables | Qingyuan…

    https://www.statslab.cam.ac.uk/~qz280/publication/hanova/
    3 Jun 2024: Search. Estimation and prediction in sparse and unbalanced tables. Qingyuan Zhao, Trevor Hastie, Daryl Pregibon. March 2017Abstract. When there is a multi-way table where each dimension has large number of levels, it is computationally intensive to

  37. Phyllis Ju | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/phyllis-ju/
    3 Jun 2024: Search. Phyllis Ju. Latest. BETS: The dangers of selection bias in early analyses of the coronavirus disease (COVID-19) pandemic. 2024. Powered by the Academic theme forCite.

  38. Rajen Shah | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/rajen-shah/
    3 Jun 2024: Search. Rajen Shah. Latest. BETS: The dangers of selection bias in early analyses of the coronavirus disease (COVID-19) pandemic. 2024. Powered by the Academic theme forCite.

  39. Yang Jiang | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/yang-jiang/
    3 Jun 2024: Search. Yang Jiang. Latest. ivmodel: An R package for inference and sensitivity analysis of instrumental variables models with one endogenous variable. 2024. Powered by the Academic theme forCite.

  40. Workflow | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/workflow/
    3 Jun 2024: Search. Workflow. Migrating my website to Hugo Academic ox-hugo. Update <2021-05-30 Sun>: A template of this website is now available on GitHub. Being stuck at home during the pandemic, as miserable as it is, actually helps me to redesign my working

  41. Freedman | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/freedman/
    3 Jun 2024: Search. Freedman. Discussion on (quasi-)randomization inference. The following is an email exchange with Hyunseung Kang on the nature of randomization inference. This was sparked by a couple of papers by David Freedman and David Lane: A

  42. | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/featured/
    3 Jun 2024: Search. Featured Publications. A constructive approach to selective risk control. Many modern applications require the use of data to both select the statistical tasks and make valid inference after selection. In this …. Zijun Gao, Wenjie Hu,

  43. Luke Keele | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/luke-keele/
    3 Jun 2024: Search. Luke Keele. Latest. 2024. Powered by the Academic theme forCite.

  44. Reliable Inference for Precision Medicine | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/jsm-2021/
    3 Jun 2024: Search. Reliable Inference for Precision Medicine. Abstract. Two central objectives of individualized treatment are precision and optimality. A third objective is robustness, and this talk aims to explore what could happen if we account for

  45. Mendelian randomization: Old and new insights | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/epfl-2021/
    3 Jun 2024: Search. Mendelian randomization: Old and new insights. Abstract. Mendelian randomization (MR) is a method for causal inference that utilizes the natural experiment in genetic inheritance. The idea of MR can be traced back to the dawn of modern

  46. Wes Spiller | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/wes-spiller/
    3 Jun 2024: Search. Wes Spiller. Latest. Two-sample instrumental variable analyses using heterogeneous samples. 2024. Powered by the Academic theme forCite.

  47. Kinjal Basu | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/kinjal-basu/
    3 Jun 2024: Search. Kinjal Basu. Latest. Permutation $p$-value approximation via generalized Stolarsky invariance. 2024. Powered by the Academic theme forCite.

  48. Ethan Lewis | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/ethan-lewis/
    3 Jun 2024: Search. Ethan Lewis. Latest. Causal mediation analysis for time-varying heritable risk factors with Mendelian Randomization. 2024. Powered by the Academic theme forCite.

  49. Rachel Kelz | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/rachel-kelz/
    3 Jun 2024: Search. Rachel Kelz. Latest. Falsification tests for instrumental variable designs with an application to tendency to operate. 2024. Powered by the Academic theme forCite.

  50. Nancy Zhang | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/nancy-zhang/
    3 Jun 2024: Search. Nancy Zhang. Latest. 2024. Powered by the Academic theme forCite.

  51. Fisher, Statistics, and Randomization | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/fisher-2022/
    3 Jun 2024: Search. Fisher, Statistics, and Randomization. Abstract. One of Fisher’s most important scientific contributions is the paradigm of randomized experiments. I will try to trace the origin of this idea and highlight how it is rooted in Fisher’s

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