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Jonah B. Gelbach

University of Pennsylvania Law School

Professor of Law

3501 Sansom Street

Philadelphia, PA 19104

United States

  • University of Pennsylvania Law School

SCHOLARLY PAPERS

32

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CITATIONS
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377

Scholarly Papers (32)

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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 Pennsylvania Law School, University of Pennsylvania Law School and George Mason University - Buchanan Center Political Economy
Downloads 1,554 (7,075)
Citation 3

Abstract:

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

2.

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 Pennsylvania Law School, Claremont McKenna College - Robert Day School of Economics and Finance and University of Pennsylvania Law School
Downloads 614 (30,235)
Citation 2

Abstract:

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

3.

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 Pennsylvania Law School
Downloads 482 (46,991)

Abstract:

pleading, civil procedure, selection, Twombly, Iqbal

4.

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 Pennsylvania Law School
Downloads 423 (28,250)
Citation 5

Abstract:

decompositions, black-white wage gap, omitted variables

5.

The Logic and Limits of Event Studies in Securities Fraud Litigation

Downloads 331 ( 73,906)

The Logic and Limits of Event Studies in Securities Fraud Litigation

Texas Law Review, 2018, Forthcoming, ECGI - Law Working Paper No. 328/2016, U of Penn, Inst for Law & Econ Research Paper No. 16-16
Number of pages: 71 Posted: 03 Aug 2016 Last Revised: 11 May 2017
Jill E. Fisch, Jonah B. Gelbach and Jonathan Klick
University of Pennsylvania Law School - Institute for Law and Economics, University of Pennsylvania Law School and University of Pennsylvania Law School
Downloads 275 (90,382)

Abstract:

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 WP No. 552
Number of pages: 85 Posted: 08 Nov 2016
Jill E. Fisch, Jonah B. Gelbach and Jonathan Klick
University of Pennsylvania Law School - Institute for Law and Economics, University of Pennsylvania Law School and University of Pennsylvania Law School
Downloads 56 (314,236)

Abstract:

6.

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 Pennsylvania Law School, University of Pennsylvania Law School and University of Illinois College of Law
Downloads 297 (76,181)
Citation 2

Abstract:

7.

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 Pennsylvania Law School and University of California, Davis - Department of Economics
Downloads 278 (81,441)
Citation 93

Abstract:

clustered errors, random effects, cluster robust

8.

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: 24 Oct 2014
Jonah B. Gelbach and Jonathan Klick
University of Pennsylvania Law School and University of Pennsylvania Law School
Downloads 254 (50,232)

Abstract:

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

9.

Robust Inference with Multi-Way Clustering

NBER Working Paper No. t0327
Number of pages: 34 Posted: 06 Oct 2006
A. Colin Cameron, Jonah B. Gelbach and Douglas L. Miller
University of California, Davis - Department of Economics, University of Pennsylvania Law School and University of California, Davis - Department of Economics
Downloads 250 (96,448)
Citation 182

Abstract:

10.

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 Pennsylvania Law School, University of California, Berkeley and Agnes Scott College
Downloads 170 (139,873)
Citation 24

Abstract:

welfare reform, marriage, divorce

11.

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 Pennsylvania Law School
Downloads 164 (119,257)

Abstract:

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

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 Pennsylvania Law School and George Mason University - School of Law
Downloads 156 (86,653)
Citation 1

Abstract:

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

13.

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 Pennsylvania Law School
Downloads 123 (181,430)

Abstract:

pleading, litigation, selection, Twombly, Iqbal

14.

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 Pennsylvania Law School
Downloads 116 (120,452)

Abstract:

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

15.

What Mean Impacts Miss: Distributional Effects of Welfare Reform Experiments

Downloads 113 (203,025)
Citation 36

What Mean Impacts Miss: Distributional Effects of Welfare Reform Experiments

IZA Discussion Paper No. 1728
Number of pages: 49 Posted: 08 Sep 2005
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of Pennsylvania Law School and University of California, Berkeley
Downloads 87 (244,611)
Citation 36

Abstract:

treatment effect heterogeneity, welfare reform, distributional effects

What Mean Impacts Miss: Distributional Effects of Welfare Reform Experiments

NBER Working Paper No. w10121
Number of pages: 59 Posted: 28 Nov 2003
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of Pennsylvania Law School and University of California, Berkeley
Downloads 26 (425,131)
Citation 36

Abstract:

16.

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 Pennsylvania Law School and University at Albany
Downloads 67 (217,048)
Citation 3

Abstract:

17.

Welfare Reform and Health

NBER Working Paper No. W10549
Number of pages: 39 Posted: 18 Jun 2004
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of Pennsylvania Law School and University of California, Berkeley
Downloads 32 (364,828)
Citation 11

Abstract:

18.

The Impact of Welfare Reform on Living Arrangements

NBER Working Paper No. w8784
Number of pages: 59 Posted: 14 Feb 2002
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of Pennsylvania Law School and University of California, Berkeley
Downloads 30 (383,237)
Citation 8

Abstract:

19.

Distributional Impacts of the Self-Sufficiency Project

NBER Working Paper No. w11626
Number of pages: 53 Posted: 25 May 2006
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of Pennsylvania Law School and University of California, Berkeley
Downloads 26 (399,740)
Citation 7

Abstract:

20.

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
Marianne P. Bitler, Jonah B. Gelbach and Hilary Williamson Hoynes
University of California, Davis - Departments of Economics and Agricultural Resource Economics, University of Pennsylvania Law School and University of California, Berkeley
Downloads 7 (509,811)

Abstract:

21.

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 Pennsylvania Law School
Downloads 0 (423,138)

Abstract:

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

22.

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 Pennsylvania Law School and George Mason University - School of Law
Downloads 0 (220,068)

Abstract:

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

23.

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

University of Pennsylvania Law Review, Vol. 165, Forthcoming, U of Penn Law School, Public Law Research Paper No. 17-6
Number of pages: 41 Posted: 26 Jan 2017
Jonah B. Gelbach
University of Pennsylvania Law School
Downloads 0 (257,593)

Abstract:

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

24.

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 Pennsylvania Law School
Downloads 0 (357,908)

Abstract:

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

25.

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 Pennsylvania Law School
Downloads 0 (312,543)

Abstract:

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

26.

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 Pennsylvania Law School
Downloads 0 (454,265)

Abstract:

27.

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 Pennsylvania Law School and University of Arizona - James E. Rogers College of Law
Downloads 0 (114,985)

Abstract:

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

28.

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 Pennsylvania Law School
Downloads 0 (294,609)

Abstract:

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

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 Pennsylvania Law School
Downloads 0 (248,108)

Abstract:

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.

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 Pennsylvania Law School
Downloads 0 (485,263)

Abstract:

Discovery, litigation, mechanism design, Coase theorem

31.

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

Journal of Political Economy, Vol. 112, pp. 1091-1130, October 2004
Posted: 03 Sep 2004
Jonah B. Gelbach
University of Pennsylvania Law School

Abstract:

32.

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 Pennsylvania Law School

Abstract:

Other Papers (1)

Total Downloads: 20    Citations: 0
Actions:
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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 Pennsylvania Law School and Case Western Reserve University, Weatherhead School of Management
Downloads 0

Abstract:

event study, Bayesian statistical, securities litigation, antitrust

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