Jonah B. Gelbach

University of California, Berkeley - School of Law

215 Law Building

Berkeley, CA 94720-7200

United States

  • University of California, Berkeley - School of Law

SCHOLARLY PAPERS

43

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16,997

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613

Scholarly Papers (43)

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1.

Cheap Donuts and Expensive Broccoli: The Effect of Relative Prices on Obesity

Number of pages: 36 Posted: 01 Apr 2007 Last Revised: 17 Dec 2009
Jonah B. Gelbach, Jonathan Klick and Thomas Stratmann
University of California, Berkeley - School of Law, University of Pennsylvania Carey Law School and George Mason University - Buchanan Center Political Economy
Downloads 2,517 (12,226)
Citation 5

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BMI, fat, diet, health, wild cluster bootstrap, fat tax

2.

When Do Covariates Matter? And Which Ones, and How Much?

Journal of Labor Economics, Forthcoming
Number of pages: 40 Posted: 26 Jun 2009 Last Revised: 16 Sep 2014
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 1,500 (27,676)
Citation 58

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decompositions, black-white wage gap, omitted variables

3.

Legal Tech, Civil Procedure, and the Future of Adversarialism

University of Pennsylvania Law Review, Forthcoming
Number of pages: 100 Posted: 02 Apr 2020 Last Revised: 15 Jun 2021
David Freeman Engstrom and Jonah B. Gelbach
Stanford Law School and University of California, Berkeley - School of Law
Downloads 1,287 (34,618)
Citation 3

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civil procedure, legal tech, artificial intelligence, machine learning, pleading standards, discovery, legal automation, work product doctrine, adversarial legalism, access to justice, forum shopping

4.

Testing for Racial Discrimination in Bail Setting Using Nonparametric Estimation of a Parametric Model

Number of pages: 57 Posted: 23 Jan 2012
Jonah B. Gelbach and Shawn D. Bushway
University of California, Berkeley - School of Law and University at Albany
Downloads 1,133 (41,750)
Citation 1

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5.

The Logic and Limits of Event Studies in Securities Fraud Litigation

Downloads 1,079 (44,737)
Citation 13

The Logic and Limits of Event Studies in Securities Fraud Litigation

Texas Law Review, Vol. 96, p. 553, 2018, ECGI - Law Working Paper No. 328/2016, U of Penn, Inst for Law & Econ Research Paper No. 16-16
Number of pages: 69 Posted: 03 Aug 2016 Last Revised: 30 Mar 2018
Jill E. Fisch, Jonah B. Gelbach and Jonathan Klick
University of Pennsylvania Carey Law School, University of California, Berkeley - School of Law and University of Pennsylvania Carey Law School
Downloads 749 (72,639)
Citation 6

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Civil procedure, evidence, Supreme Court of the United States, SCOTUS, Halliburton Co. v. Erica P. John Fund, Inc., Basic, Inc. v. Levinson, fraud on the market, event study methodology, fraudulent information, significance, error rates, one-sided SQ test, securities fraud, 10b-5 litigation

After Halliburton: Event Studies and Their Role in Federal Securities Fraud Litigation

CFS Working Paper, No. 552
Number of pages: 71 Posted: 08 Nov 2016 Last Revised: 13 Jan 2018
Jill E. Fisch, Jonah B. Gelbach and Jonathan Klick
University of Pennsylvania Carey Law School, University of California, Berkeley - School of Law and University of Pennsylvania Carey Law School
Downloads 330 (196,253)
Citation 7

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6.

Valid Inference in Single-Firm, Single-Event Studies

American Law and Economics Review, Forthcoming
Number of pages: 38 Posted: 01 Aug 2009 Last Revised: 03 Sep 2012
Jonah B. Gelbach, Eric Helland and Jonathan Klick
University of California, Berkeley - School of Law, Claremont McKenna College - Robert Day School of Economics and Finance and University of Pennsylvania Carey Law School
Downloads 855 (61,969)
Citation 15

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event study, sample quantiles, abnormal return, bootstrap, non-parametric, securities litigation

7.

Empirical Law and Economics

Oxford Handbook of Law and Economics, edited by Francesco Parisi, Forthcoming, U of Penn, Inst for Law & Econ Research Paper No. 14-39
Number of pages: 26 Posted: 10 Oct 2014 Last Revised: 19 Jun 2018
Jonah B. Gelbach and Jonathan Klick
University of California, Berkeley - School of Law and University of Pennsylvania Carey Law School
Downloads 816 (65,882)
Citation 2

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applied econometrics, event studies, crime, civil procedure, Police Academy, octuple differences, Buckaroo Banzai

8.

Locking the Doors to Discovery? Assessing the Effects of Twombly and Iqbal on Access to Discovery

121 Yale L. J. 2270 (2012)
Number of pages: 77 Posted: 10 Nov 2011 Last Revised: 10 Sep 2016
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 556 (107,941)
Citation 5

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pleading, civil procedure, selection, Twombly, Iqbal

9.

Power and Statistical Significance in Securities Fraud Litigation

Harvard Business Law Review, Vol. 11, p. 55, 2021, U of Penn, Inst for Law & Econ Research Paper No. 20-28, European Corporate Governance Institute - Law Working Paper No. 511/2020
Number of pages: 64 Posted: 17 Apr 2020 Last Revised: 11 Jun 2021
Jill E. Fisch and Jonah B. Gelbach
University of Pennsylvania Carey Law School and University of California, Berkeley - School of Law
Downloads 464 (134,798)
Citation 4

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Civil procedure, evidence, financial economics, fraud on the market, event study methodology, statistics, fraudulent information, significance, class actions & certification, securities fraud, 10b-5 litigation, Securities and Exchange Commission, SEC

10.

Bootstrap-Based Improvements for Inference with Clustered Errors

FSU College of Law, Law and Economics Paper No. 07/002
Number of pages: 52 Posted: 12 Jan 2007
A. Colin Cameron, Jonah B. Gelbach and Douglas L. Miller
University of California, Davis - Department of Economics, University of California, Berkeley - School of Law and University of California, Davis - Department of Economics
Downloads 459 (136,503)
Citation 14

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clustered errors, random effects, cluster robust

11.

Machine Learning and Predicted Returns for Event Studies in Securities Litigation Preliminary and Incomplete

Rock Center for Corporate Governance at Stanford University Working Paper No. 244
Number of pages: 56 Posted: 14 May 2020
Andrew C. Baker and Jonah B. Gelbach
Stanford University, Law School, Stanford University, School of Law, Student and University of California, Berkeley - School of Law
Downloads 407 (156,975)
Citation 2

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machine learning, securities litigation, abnormal returns, machine learning methods and event studies

12.

The Law and Economics of Proportionality in Discovery

Georgia Law Review, Vol. 50, P. 1093, 2016, U of Penn, Inst for Law & Econ Research Paper No. 15-1, George Mason Law & Economics Research Paper No. 15-02
Number of pages: 29 Posted: 20 Jan 2015 Last Revised: 25 Feb 2017
Jonah B. Gelbach and Bruce H. Kobayashi
University of California, Berkeley - School of Law and George Mason University - Antonin Scalia Law School
Downloads 398 (160,941)
Citation 2

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Proportionality, discovery, litigation, law and economics, civil procedure

13.

A Study of Social Security Disability Litigation in the Federal Courts

Final Report to the Administrative Conference of the United States, July 28, 2016, Arizona Legal Studies Discussion Paper No. 16-23, U of Penn Law School, Public Law Research Paper No. 16-34
Number of pages: 179 Posted: 14 Aug 2016 Last Revised: 09 Sep 2016
Jonah B. Gelbach and David Marcus
University of California, Berkeley - School of Law and UCLA School of Law
Downloads 397 (161,427)

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Social Security disability litigation, agency review, appeals, federal district court, procedural rules, administrative law

14.

Passive Discrimination: When Does it Make Sense to Pay Too Little?

University of Chicago Law Review, Vol. 76, p. 797, 2009, FSU College of Law, Public Law Research Paper No. 315, FSU College of Law, Law, Business & Economics Paper No. 08-10
Number of pages: 61 Posted: 07 Sep 2008 Last Revised: 03 Aug 2012
Jonah B. Gelbach, Jonathan Klick and Lesley Wexler
University of California, Berkeley - School of Law, University of Pennsylvania Carey Law School and University of Illinois College of Law
Downloads 385 (167,045)

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15.

What Mean Impacts Miss: Distributional Effects of Welfare Reform Experiments

Downloads 378 (170,560)
Citation 13

What Mean Impacts Miss: Distributional Effects of Welfare Reform Experiments

IZA Discussion Paper No. 1728
Number of pages: 49 Posted: 08 Sep 2005 Last Revised: 17 Nov 2021
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of California, Berkeley - School of Law and University of California, Berkeley
Downloads 220 (298,238)

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distributional effects, treatment effect heterogeneity, welfare reform

What Mean Impacts Miss: Distributional Effects of Welfare Reform Experiments

NBER Working Paper No. w10121
Number of pages: 59 Posted: 28 Nov 2003 Last Revised: 27 Feb 2022
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of California, Berkeley - School of Law and University of California, Berkeley
Downloads 158 (404,852)
Citation 13

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16.

TESTING ECONOMIC MODELS OF DISCRIMINATION IN CRIMINAL JUSTICE

Number of pages: 39 Posted: 18 Feb 2021
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 374 (173,126)
Citation 1

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discrimination; Becker model; specification testing; bail; pretrial release; highway search

17.

Legal Sufficiency of Statistical Evidence

George Mason Legal Studies Research Paper No. LS 18-29
Number of pages: 30 Posted: 05 Sep 2018 Last Revised: 31 May 2019
Jonah B. Gelbach and Bruce H. Kobayashi
University of California, Berkeley - School of Law and George Mason University - Antonin Scalia Law School
Downloads 333 (196,018)

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evidence, legal sufficiency, civil procedure, complex litigation, statistical evidence, Bayesian statistics, likelihood ratio, hypothesis testing

18.

Robust Inference with Multi-Way Clustering

NBER Working Paper No. t0327
Number of pages: 34 Posted: 06 Oct 2006 Last Revised: 26 May 2023
A. Colin Cameron, Jonah B. Gelbach and Douglas L. Miller
University of California, Davis - Department of Economics, University of California, Berkeley - School of Law and University of California, Davis - Department of Economics
Downloads 325 (202,566)
Citation 403

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19.

The Impact of Welfare Reform on Marriage and Divorce

Federal Reserve Bank of Atlanta Working Paper No. 2002-9
Number of pages: 30 Posted: 18 Nov 2002
Marianne P. Bitler, Jonah B. Gelbach, Hilary Williamson Hoynes and Madeline Zavodny
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of California, Berkeley - School of Law, University of California, Berkeley and University of North Florida
Downloads 298 (222,529)
Citation 24

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welfare reform, marriage, divorce

20.

Error Costs, Legal Standards of Proof and Statistical Significance

Supreme Court Economic Review, Forthcoming, George Mason Law & Economics Research Paper No. 17-21, U of Penn, Inst for Law & Econ Research Paper No. 17-22
Number of pages: 42 Posted: 21 Apr 2017 Last Revised: 22 Jul 2017
Michelle Burtis, Jonah B. Gelbach and Bruce H. Kobayashi
Charles River Associates (CRA) International, University of California, Berkeley - School of Law and George Mason University - Antonin Scalia Law School
Downloads 294 (224,146)

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error cost analysis, fixed significance threshold, law and economics, legal inference, legal standards, null hypothesis statistical testing, standards of proof, statistical inference

21.

Material Facts in the Debate Over Twombly and Iqbal

Stanford Law Review, Vol. 68, P. 369, 2016, U of Penn, Inst for Law & Econ Research Paper No. 15-11
Number of pages: 56 Posted: 01 Mar 2015 Last Revised: 19 Apr 2016
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 276 (239,344)
Citation 5

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pleading, plausibility, summary judgment, Twombly, Iqbal, civil procedure, empirical

22.

Validating Valuation: How Statistical Learning Can Cabin Expert Discretion in Valuation Disputes

Number of pages: 65 Posted: 31 May 2024
Andrew Baker, Jonah B. Gelbach and Eric L. Talley
Berkeley Law School, University of California, Berkeley - School of Law and Columbia University - School of Law
Downloads 275 (242,093)

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23.

Can the Dark Arts of the Dismal Science Shed Light on the Empirical Reality of Civil Procedure?

2 Stanford Journal of Complex Litigation 223 (2014)
Number of pages: 70 Posted: 17 Mar 2014 Last Revised: 19 Sep 2014
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 257 (257,257)
Citation 2

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Civil Procedure, Empirical Legal Studies, Law and Economics, Pleading Standard, Twombly, Iqbal

24.

Secrecy by Stipulation

74 Duke L.J. 99, Stanford Law and Economics Olin Working Paper No. 599, UC Berkeley Public Law Research Paper
Number of pages: 84 Posted: 02 May 2024 Last Revised: 26 Feb 2025
Nora Freeman Engstrom, David Freeman Engstrom, Jonah B. Gelbach, Austin Peters and Aaron Schaffer-Neitz
Stanford Law School, Stanford Law School, University of California, Berkeley - School of Law, Stanford University and Stanford Law School
Downloads 187 (349,037)

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Protective Orders, Rule 26, Rule 26(c), civil procedure, stipulated orders, secrecy, transparency, NDAs

25.

Rethinking Judicial Review of High Volume Agency Adjudication

Texas Law Review (2018, Forthcoming), Arizona Legal Studies Discussion Paper No. 17-23, U of Penn Law School, Public Law Research Paper No. 17-53
Number of pages: 67 Posted: 22 Sep 2017 Last Revised: 06 Jun 2021
Jonah B. Gelbach and David Marcus
University of California, Berkeley - School of Law and UCLA School of Law
Downloads 185 (352,560)
Citation 5

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civil procedure, litigation, Article III judicial review, administrative review, problem-oriented oversight, agency appeals

26.

Selection in Motion: A Formal Model of Rule 12(B)(6) and the Twombly-Iqbal Shift in Pleading Policy

Number of pages: 54 Posted: 29 Aug 2012 Last Revised: 21 Feb 2013
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 173 (374,216)
Citation 2

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pleading, litigation, selection, Twombly, Iqbal

27.

The Impact of Welfare Reform on Living Arrangements

NBER Working Paper No. w8784
Number of pages: 59 Posted: 14 Feb 2002 Last Revised: 02 Jan 2022
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of California, Berkeley - School of Law and University of California, Berkeley
Downloads 170 (380,151)
Citation 4

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28.

The Triangle of Law and the Role of Evidence in Class Action Litigation

University of Pennsylvania Law Review, Vol. 165, p. 1807, 2017, U of Penn Law School, Public Law Research Paper No. 17-6
Number of pages: 40 Posted: 26 Jan 2017 Last Revised: 17 Oct 2017
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 144 (437,088)

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Federal Rules of Civil Procedure, FRCP, employment law, complex litigation, counterfactual evidence, class certification, Tyson Foods v. Bouaphakeo, Anderson v. Mt. Clemens Pottery Co., Wal-Mart Stores, Inc., v. Dukes, Mathews v. Eldridge

29.

Can Simple Mechanism Design Results Be Used to Implement the Proportionality Standard in Discovery?

Journal of Institutional and Theoretical Economics, Forthcoming 2016, U of Penn, Inst for Law & Econ Research Paper No. 16-2
Number of pages: 22 Posted: 12 Jan 2016
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 135 (460,414)

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Civil litigation, courts, discovery, pre-trial, Federal Rule of Civil Procedure 26, information, Coase theorem, efficiency, mechanism design, auction theory, transaction costs, pre-discovery settlement, social norms, Nirvana mechanism

30.

The Reduced Form of Litigation Models and the Plaintiff's Win Rate

U of Penn, Inst for Law & Econ Research Paper No. 16-22
Number of pages: 36 Posted: 11 Sep 2016 Last Revised: 13 Sep 2016
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 126 (486,532)
Citation 5

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litigation selection, litigation, selection, Priest-Klein, reduced form, win rate, plaintiff win rate, law and economics, legal procedure

31.

Welfare Reform and Health

NBER Working Paper No. w10549
Number of pages: 39 Posted: 18 Jun 2004 Last Revised: 30 Oct 2022
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of California, Berkeley - School of Law and University of California, Berkeley
Downloads 121 (505,192)
Citation 16

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32.

Can We Learn Anything About Pleading Changes from Existing Data?

International Review of Law and Economics, Vol. 44, P. 72, 2015, U of Penn, Inst for Law & Econ Research Paper No. 16-11
Number of pages: 46 Posted: 14 Jul 2016
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 99 (582,459)

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Civil procedure, Federal Rule 12(b)(6), motion to dismiss, Bell Atlantic Corp. v. Twombly, Iqbal v. Ashcroft, empirical legal studies, selection effects, incentives, litigation, multivariate models, statistical methodology, behavioral assumptions

33.

Uncontrolled Experiments from the Laboratories of Democracy: Traditional Cash Welfare, Federalism, and Welfare Reform

Chapter 5 of The Law and Economics of Federalism, ed. Jonathan Klick, Edward Elgar Publishing Ltd. (2016), U of Penn Law School, Public Law Research Paper No. 16-37
Number of pages: 60 Posted: 12 Sep 2016 Last Revised: 28 Oct 2016
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 89 (623,094)

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welfare, federalism, cash assistance, AFDC, TANF, PRWORA, welfare reform

34.

Beyond Transsubstantivity

Number of pages: 80 Posted: 28 Feb 2024
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 86 (636,414)

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Empirical legal studies, Civil procedure, Transsubstantivity

35.

American Pipe Tolling, Statutes of Repose, and Protective Filings: An Empirical Study

69 Stanford Law Review Online 92 (2017), Stanford Public Law Working Paper, U of Penn Law School, Public Law Research Paper No. 17-26
Number of pages: 13 Posted: 23 Jun 2017 Last Revised: 01 Jul 2017
David Freeman Engstrom and Jonah B. Gelbach
Stanford Law School and University of California, Berkeley - School of Law
Downloads 73 (699,594)

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American Pipe, tolling rules, civil procedure, Rule 23, empirical legal studies

36.

Distributional Impacts of the Self-Sufficiency Project

NBER Working Paper No. w11626
Number of pages: 53 Posted: 25 May 2006 Last Revised: 09 Oct 2022
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of California, Berkeley - School of Law and University of California, Berkeley
Downloads 73 (699,594)
Citation 5

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37.

The Dynamic Dilemma: Dynamics and Disuniformity in Statutory Interpretation

RESEARCH HANDBOOK ON LAW AND TIME, F. Fagan & S. Levmore (eds.), Edward Elgar Ltd. (Forthcoming)
Number of pages: 47 Posted: 21 Feb 2024
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 72 (704,981)

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Dynamic interpretation, uniformity, disuniformity, statutory interpretation, legal interpretation, Bostock, Title 7

38.

Expert Mining and Required Disclosure

University of Chicago Law Review, Vol. 81, P. 131, 2014, U of Penn, Inst for Law & Econ Research Paper No. 16-23
Number of pages: 21 Posted: 11 Sep 2016 Last Revised: 24 Sep 2016
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 71 (710,464)

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39.

Can Variation in Subgroups' Average Treatment Effects Explain Treatment Effect Heterogeneity? Evidence from a Social Experiment

NBER Working Paper No. w20142
Number of pages: 35 Posted: 19 May 2014 Last Revised: 16 Jul 2023
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of California, Berkeley - School of Law and University of California, Berkeley
Downloads 60 (776,561)
Citation 4

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40.

Law Professors' Amicus Brief Supporting the Electronic Frontier Foundation

Number of pages: 36 Posted: 16 Sep 2024
Nora Freeman Engstrom, David Freeman Engstrom, Jonah B. Gelbach, Rose Carmen Goldberg and Brianne Holland-Stergar
Stanford Law School, Stanford Law School, University of California, Berkeley - School of Law, Stanford Law School and Rhode Center on the Legal Profession, Stanford Law School
Downloads 36 (975,520)

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41.

Appendix to 'Can Simple Mechanism Design Results Be Used to Implement the Proportionality Standard in Discovery?'

Number of pages: 9 Posted: 29 Oct 2015
Jonah B. Gelbach
University of California, Berkeley - School of Law
Downloads 34 (996,125)

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Discovery, litigation, mechanism design, Coase theorem

42.

Migration, the Life Cycle, and State Benefits: How Low is the Bottom?

Posted: 03 Sep 2004
Jonah B. Gelbach
University of California, Berkeley - School of Law

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43.

The Lifecycle Welfare Migration Hypothesis: Evidence from The 1980 and 1990 Censuses

University of Maryland Dept. of Econ. Working Paper
Posted: 11 Apr 2000
Jonah B. Gelbach
University of California, Berkeley - School of Law

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Other Papers (2)

Total Downloads: 230
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1.

Bayesian Analysis of a Single Firm Event Study

Number of pages: 33 Posted: 16 Nov 2012 Last Revised: 04 Feb 2015
Jonah B. Gelbach and Jenny R. Hawkins
University of California, Berkeley - School of Law and Case Western Reserve University, Weatherhead School of Management
Downloads 196

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event study, Bayesian statistical, securities litigation, antitrust

2.

Appendix Material for After Halliburton: Event Studies and Their Role in Federal Securities Fraud Litigation

Number of pages: 14 Posted: 22 Sep 2021
Jill E. Fisch, Jonah B. Gelbach and Jonathan Klick
University of Pennsylvania Carey Law School, University of California, Berkeley - School of Law and University of Pennsylvania Carey Law School
Downloads 34

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