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  2. Talks | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/
    3 Jun 2024: 2024-02-08 2:00 PM — 3:00 PM London School of Economics and Political Science (LSE).
  3. Publications | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/publication/
    3 Jun 2024: Falsification tests for instrumental variable designs with an application to tendency to operate. ... Journal of Business & Economic Statistics (2019). Charles Zheng, Trevor Hastie, Robert Tibshirani (2016).
  4. Curriculum Vitae

    www.statslab.cam.ac.uk/~qz280/files/cv.pdf
    20 Mar 2024: arXiv: 2208.13871 [stat.ME]. 49. Y. Zhang and Q. Zhao, “Multiple conditional randomization tests,” 2021. ... 15. Journal of the Americal Statistical Association. 16. Journal of Business & Economic Statistics.
  5. Mendelian randomization

    www.statslab.cam.ac.uk/~qz280/talk/mr-tutorial/slides.pdf
    3 Jun 2024: 7/40. IV in Economics: Effect of military service on earnings2. Lottery number Z Military service X Earning Y. ... administrative records. American Economic Review, 80(3), 313–336. 8/40. Results of the Vietnam-war lottery study.
  6. STATISTICAL MODELLING Part IIC, Michaelmas 2021 Practical 8:…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P8.pdf
    3 Jun 2024: mod2 <- glm(Freq subject_msubject_f match, data=SD_subj, family=poisson). > anova(mod1, mod2, test="LR"). ... Therefore we can calculate the approximate p-value for the test above with. >
  7. Causal Inference: An Introduction Qingyuan Zhao Statistical…

    www.statslab.cam.ac.uk/~qz280/talk/ssrmp-2020/slides.pdf
    3 Jun 2024: Examples in social sciences. 1 Economics: How does supply and demand (causally) depend on price? ... Statistical inference: Approach 1. Randomisation inference (permutation test). Test the hypothesis H0 : A Y | X (or H0 : A Y if randomisation does
  8. Sensitivity analysis for observational studies: Past, Present, and…

    www.statslab.cam.ac.uk/~qz280/talk/uea-2024/slides.pdf
    3 Jun 2024: Solid curves: contours of likelihood ratio test. Dashed curves:. estimated ATE reduced by half. ... Blattman, Christopher and Jeannie Annan (2010). “The Consequences of ChildSoldiering”. In: The Review of Economics and Statistics 92.4, pp.
  9. Causal Inference

    www.statslab.cam.ac.uk/~qz280/teaching/causal-2023/slides.pdf
    3 Jun 2024: Randomization inference: General tests. Randomization provides the “reasoned basis” for Fisher’s exact test. ... Randomization inference: F-test. Setting: Neyman-Rubin model, A = {0,1,. ,k 1}.
  10. Will competition-winning methods for causal inference also succeed in …

    www.statslab.cam.ac.uk/~qz280/publication/acic-competition-comment/paper.pdf
    3 Jun 2024: REFERENCES. Angrist, J. D. and Krueger, A. B. (1999). Empirical strategies in labor economics. ... TheAmerican Economic Review Papers and Proceedings 93 126-132. Keele, L. and Small, D.
  11. Sensitivity analysis for observational studies: Looking back and…

    www.statslab.cam.ac.uk/~qz280/talk/yale-biostats-2020-2/slides.pdf
    3 Jun 2024: The Reviewof Economics and Statistics, 92(4):882–898, 2010. doi:10.1162/REST a 00036. C. ... Biometrics, 69:803–811, 2013. G. W. Imbens. Sensitivity to exogeneity assumptions in program evaluation.American Economic Review, 93:126–132, 2003.
  12. Confounder adjustment in large-scale linear structural models

    www.statslab.cam.ac.uk/~qz280/publication/cate-mutual-fund/slides.pdf
    3 Jun 2024: I In R, run summary(lm(YX)).I Equivalent to a two-sample t-test with equal variance. ... Journal of Financial Economics, 33(1).7. Carhart, M. M. (1997). “On persistence in mutual fund performance.” Journal of Finance, 52(1).
  13. CAUSAL INTERPRETATIONS OF BLACK-BOX MODELS QINGYUAN ZHAO AND TREVOR…

    www.statslab.cam.ac.uk/~qz280/publication/pdp/paper.pdf
    3 Jun 2024: ICE is first introduced to discover. interaction between the predictor variables and visually test if the function g is additive. ... Journal of Economic Perspectives, 31(2):87–106, 2017. Judea Pearl. Comment: Graphical models, causality and
  14. Two-Sample Instrumental Variable Analysis: Challenges and Some…

    www.statslab.cam.ac.uk/~qz280/publication/two-sample-iv/slides.pdf
    3 Jun 2024: Future work: Goodness-of-fit test of the statistical model. Good statistical fit more confidence in the results? ... TheReview of Economics and Statistics, 92(3):557–561, 2010. M. Katan. Apoupoprotein e isoforms, serum cholesterol, and cancer.
  15. Lecture Notes on Causal Inference(with corrections) Qingyuan Zhao May …

    www.statslab.cam.ac.uk/~qz280/teaching/causal-2023/notes-2021.pdf
    3 Jun 2024: The first approachtries to test the conditional independence A[n] Y[n](0) | X. ... A level-α randomisation test then rejects H0 if Pm α. 2.19 Theorem.
  16. Results that match 1 of 2 words

  17. What is a randomization test? | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/toronto-2022/
    3 Jun 2024: Search. What is a randomization test? Date. 2022-03-23 2:00 PM — 3:00 PM.
  18. Falsification tests for instrumental variable designs with an…

    https://www.statslab.cam.ac.uk/~qz280/publication/iv-falsification/
    3 Jun 2024: Search. Falsification tests for instrumental variable designs with an application to tendency to operate. ... We demonstrate this test using an IV known as tendency to operate (TTO) from health services research.
  19. Multiple conditional randomization tests | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/mcp-2022/
    3 Jun 2024: Search. Multiple conditional randomization tests. Date. 2022-08-31 1:45 PM — 2:15 PM.
  20. www.statslab.cam.ac.uk/~qz280/talk/index.xml

    www.statslab.cam.ac.uk/~qz280/talk/index.xml
    3 Jun 2024: talk/ccaim-summer-school-2022/ Multiple conditional randomization tests https://www.statslab.cam.ac.uk/qz280/talk/mcp-2022/ Wed, 31 Aug 2022 13:45:00 0000 ... ac.uk/qz280/talk/mcp-2022/ Multiple conditional randomization tests
  21. What is a randomization test? | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/publication/single-crt/
    3 Jun 2024: A new term—‘quasi-randomization test’—is introduced to define significance tests based on theoretical models and distinguish these tests from the ‘randomization tests’ based on the physical act of randomization. ... The proposed terminology
  22. Multiple conditional randomization tests | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/publication/multiple-crts/
    3 Jun 2024: April 2021Abstract. We propose a general framework for (multiple) conditional randomization tests that incorporate several important ideas in the recent literature. ... We show that under a change of perspective, many existing statistical methods,
  23. Multiple conditional randomization tests | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/ims-2022/
    3 Jun 2024: Search. Multiple conditional randomization tests. Date. 2022-06-27 5:10 PM — 5:30 PM.
  24. Multiple conditional randomization tests

    www.statslab.cam.ac.uk/~qz280/talk/berkeley-2021/slides.pdf
    3 Jun 2024: Slides: http://statslab.cam.ac.uk/qz280/. The role of randomization tests became obscure. Fisher (1935): To substitute t-test when normality is not true and to restore randomization as “thephysical ... Conditional randomization tests for discrete
  25. Rachel Kelz | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/author/rachel-kelz/
    3 Jun 2024: Falsification tests for instrumental variable designs with an application to tendency to operate.
  26. Sensitivity Analysis | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/sensitivity-analysis/
    3 Jun 2024: It only tests the sharp null hypothesis; 3. It assumes treatment effect homogeneity to obtain a confidence interval of …. 2024. Powered by the Academic theme forCite.
  27. Selective Randomization Inference for Adaptive Experiments | Qingyuan …

    https://www.statslab.cam.ac.uk/~qz280/publication/selective-randomization/
    3 Jun 2024: In a nutshell, our approach applies conditional post-selection inference to randomization tests. ... Lastly, we demonstrate our method and compare it with other randomization tests using synthetic and real-world data.
  28. Causal-Inference | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/causal-inference/
    3 Jun 2024: We apply ideas from post-selection inference to randomization tests for adaptive experiments.
  29. Selective Inference | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/tag/selective-inference/
    3 Jun 2024: We apply ideas from post-selection inference to randomization tests for adaptive experiments.
  30. On testing mean proportionality of multivariate normal variables |…

    https://www.statslab.cam.ac.uk/~qz280/publication/proportionality-testing/
    3 Jun 2024: We show that the usual likelihood ratio χ2-test is valid non-asymptotically. ... Our proof relies on expressing the test statistic as the minimum eigenvalue of a Wishart variable and using a representation of its distribution using Legendre polynomials.
  31. www.statslab.cam.ac.uk/~qz280/publication/index.xml

    www.statslab.cam.ac.uk/~qz280/publication/index.xml
    3 Jun 2024: qz280/publication/pathgps/ Wed, 04 May 2022 00:00:00 0000 https://www.statslab.cam.ac.uk/qz280/publication/pathgps/ What is a randomization test? ... 21 Jul 2021 00:00:00 0000 https://www.statslab.cam.ac.uk/qz280/publication/fda-comment-2021/ Multiple
  32. Group Members

    www.statslab.cam.ac.uk/~rjs57/Group.html
    18 Jun 2024: Yining Chen (Assistant Professor then Associate Professor, Department of Statistics, London School of Economics and Political Science). ... Tengyao Wang (Lecturer, Department of Statistical Science, University College London; Associate Professor, London
  33. Rajen Shah's Home Page

    www.statslab.cam.ac.uk/~rds37/
    30 May 2024: Shah, R. D. and Bühlmann, P. (2017) Goodness-of-fit tests for high-dimensional linear models. ... Shah, R. D. and Samworth, R. J. (2015) Discussion of An adaptive resampling test for detecting the presence of significant predictors by McKeague, I.
  34. Practical: Randomization inference

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/P1.pdf
    3 Jun 2024: Here are some points you mayconsider. • How do the two randomization tests compare with each other? ... Why?• How can you "invert" the randomization tests to obtain an interval estimator of the treatment.
  35. CAUSAL INFERENCE Part III / Michaelmas 2023Example Sheet 1 ...

    www.statslab.cam.ac.uk/~qz280/teaching/causal-2023/E1.pdf
    3 Jun 2024: Compare this with Fisher’s exact test in the randomization model discussedin lectures. ... i. This test should compare T with quantilesof the standard normal distribution after scaling.
  36. Confounder Adjustment in Multiple Hypothesis Testing

    www.statslab.cam.ac.uk/~qz280/publication/cate/slides.pdf
    3 Jun 2024: Model andInference. Model andIdentifiability. Estimation. Hypothesis Tests. NumericalExamples. Summary. 12/49. Association test. ... Estimation. Hypothesis Tests. NumericalExamples. Summary. 38/49. Significance test for confounding. Theorem (Wang, Z.,
  37. SISCER Module 12 Lecture 4: Matched Case-Control Studies

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/L4.pdf
    3 Jun 2024: I Mantel–Haenszel test. I Logistic regression adjusting for treatment, stratum indicators (and potentiallyother covariates). ... multiple 22 tablesI Consider sensitivity analysis for Fisher’s exact test in one 22 table.
  38. STATISTICAL MODELLING Part IIC, Michaelmas 2019Practical 1:…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P1S.pdf
    3 Jun 2024: examinable) tells us is a valid approximationto the exact distribution of the test statistic under the null. ... the (approximate) p-value for thetwo-sided test statistic. This is known as a permutation or exact test, and you can read a briefdescription
  39. Multiple conditional randomization tests | Qingyuan Zhao

    https://www.statslab.cam.ac.uk/~qz280/talk/berkeley-2021/
    3 Jun 2024: Search. Multiple conditional randomization tests. Date. 2021-09-29 9:30 PM — 10:30 PM.
  40. STATISTICAL MODELLING Part IIC, Michaelmas 2019Practical 6: Binomial…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P6S.pdf
    3 Jun 2024: This test cannot reject the simpler model without interactions between mumMyopic and dadMyopic. ... To test the hypothesis thatthe effects are equal, we can use the z-test for this coefficient.mumPlusdadMyopic <- (dadMyopic == "Yes") (mumMyopic ==
  41. STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 6: Binomial…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P6.pdf
    3 Jun 2024: 2 609 439.60 8 40.478 2.61e-06. In contrast to the lm case, here we need to specify that we want to perform a likelihood ratio test (test= ... To formally test this hypothesis, we should createa variable. > mumPlusdadMyopic <- (dadMyopic == "Yes")
  42. SISCER Module 15 Practice 3: DID

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/S4.pdf
    3 Jun 2024: Estimate Std. Error t value Pr(>|t|)## -0.036548937 0.012646474 -2.890049673 0.003893424# cluster-robust standard error with CR2 small-sample correctioncoeftest.twfe <- coef_test(fit.twfe,. ... 2. mod <- lm(form, data = df). # using arguments from here:#
  43. SISCER Module 12 Lecture 5: Instrumental variables

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/L5.pdf
    3 Jun 2024: IV in Economics: Effect of military service on earnings (Angrist, 1990). ... American Economic Review, 80(3):313–336. Gamazon, E. R., , Wheeler, H. E., Shah, K.
  44. Sensitivity analysis via stochastic programming

    www.statslab.cam.ac.uk/~qz280/talk/icsds-2023/slides.pdf
    3 Jun 2024: Blattman, Christopher and Jeannie Annan (2010). “The Consequences of ChildSoldiering”. In: The Review of Economics and Statistics 92.4, pp. ... In:American Economic Review 93, pp. 126–132. Saltelli, Andrea et al. (2004).
  45. STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 5: ANOVA and …

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P5.pdf
    3 Jun 2024: interaction.plot(Photo, Quality, fitted.values(EssayMarksLM2)). > interaction.plot(Quality, Photo, fitted.values(EssayMarksLM2)). To test for the presence of interactions, we again use an F-test:. > ... Would it be possible to com-pare the models
  46. Simultaneous Hypothesis Testing using Internal Negative Controls…

    www.statslab.cam.ac.uk/~qz280/publication/ranc/slides.pdf
    3 Jun 2024: Den. sity. Protein under investigation negative control. (a) P-values from a two-sample “t-test”. ... Enabled by validity PRDS. Global/intersection null: Simes’ test;. FWER: Hochberg-Hommel procedure (closure of Simes’ test);.
  47. STATISTICAL MODELLING Part IIC, Michaelmas 2021Practical 4: More on…

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/P4.pdf
    3 Jun 2024: If the goal is to test the significanceof some coefficients, post model-selection inference is needed to control statistical errors. ... Note that we supplied the models in order of nestedness, and so the anova functionperforms F-tests between adjacent
  48. Almost Exact Mendelian Randomization Qingyuan Zhao Statistical…

    www.statslab.cam.ac.uk/~qz280/talk/eurocim-2023/slides.pdf
    3 Jun 2024: 1993). “Transmission Test for Linkage Disequilibrium: The Insulin Gene Regionand Insulin-Dependent Diabetes Mellitus (IDDM).”. ... Fisher’s combination test 0.03 0.05 0.16. Two-stage least squares < 1020 4.5 1011.
  49. Practical: Matching/Weighting and Sensitivity Analysis

    www.statslab.cam.ac.uk/~qz280/teaching/siscer-2023/P4.pdf
    3 Jun 2024: standard error with CR2 small-sample correctioncoeftest.twfe <- coef_test(fit.twfe, vcov = "CR2", cluster = mpdta$countyreal)coeftest.twfe[2,]. ... CR2 small-sample correctioncoeftest.twfe.dynamic <- coef_test(fit.twfe.dynamic, vcov = "CR2", cluster =
  50. Cross-screening in observational studies that test many hypotheses |…

    https://www.statslab.cam.ac.uk/~qz280/publication/cross-screening/
    3 Jun 2024: Search. Cross-screening in observational studies that test many hypotheses.
  51. www.statslab.cam.ac.uk/~qz280/index.xml

    www.statslab.cam.ac.uk/~qz280/index.xml
    3 Jun 2024: or I would call them &ldquo;tests of unusualness&rdquo; or &ldquo;tests of aberrance&rdquo; or &ldquo;test of fishiness&rdquo;) as tests where the treatment (or any variable, for ... randomization tests creates a &ldquo;control group of numbers&rdquo; to
  52. STATISTICAL MODELLING Part IIC / Michaelmas 2022Example Sheet 2 ...

    www.statslab.cam.ac.uk/~qz280/teaching/modelling-2022/E2.pdf
    3 Jun 2024: Hint: Use (2). How canwe construct a hypothesis test based on η̃i to test whether the i. ... Then apply your hypothesis test to check whetherthe observation corresponding to humans is an outlier.

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