Data on Malingering in Insanity Cases Over Time

A steady decline in insanity claims by defendants in criminal cases over time juxtaposes with a concurrent increase in claims that defendants are "malingering" or "feigning" insanity or mental illness in the service of an acquittal or a reduced sentence. Neuroscientific evidence, on both sides, features prominently in these trends. And in this setting, conventional wisdom implies that state evidence introduced relating to a claim of defendant malingering may exert out-sized (negative) influence on a defendant's insanity claim.

CELS 2026 -- Submission Deadline Extension

Call for Papers -- Deadline Extension

Conference on Empirical Legal Studies

October 2-3, 2026

 

The 2026 Conference on Empirical Legal Studies (CELS) is now accepting submissions. CELS will consider empirical papers spanning all areas of empirical legal studies. Authors are encouraged to submit works-in-progress; however, submissions should be completed drafts that include principal results. Submitted papers must be unpublished and expected to be unpublished at the time of the conference.

The paper submission deadline has been extended to Monday, June 22, 2026 (11:59 PM Central Daylight Time). The deadline will not be extended further. There is no charge for submissions.

To submit a paper, please click here.

If you have any questions about the submissions process, please contact the conference organizers at: celsnorthwestern2026@gmail.com. 

Data on Judicial Recognition of Multiparent Families

Many topics in family law, for both obvious and perhaps less than obvious reasons, garner a bit more "heat than light." As well, family law topics are comparatively under-explored empirically. A recent paper by Douglas NeJamie (Yale) and Courtney Joslin (UC Davis), The Legal Recognition of Multiparent Families: Findings from an Empirical Study, breaks from tradition as it brings data to questions surrounding the legal recognition of multiparent families.

The paper levers two datasets, including all electronically available judicial decisions (through 2022) engaging with multiparent statutes as well as "judicial decisions applying a functional parent doctrine over four decades." When it comes to the judicial decisions themselves, Figure 6 (below) makes clear that judicial activity, while growing, is an emerging trend.

Court-Sealed Documents

American courts, by tradition and for all the obvious reasons, reflexively tilt in a direction that favors public access to judicial records. As such, the law of sealing is "famously strict, at least on paper." In most Circuits, a trial court can grant a party’s motion to seal only if the party can demonstrate a compelling interest favoring secrecy. Moreover, a district court must articulate the basis for a decision to seal a document.

In [Sealed Document]: An Empirical Study of Sealing Orders in the Federal Courts, Nora Freeman Engstrom (Stanford) et al. bring data to how the law of sealing operates "on the ground." What they find, based on data from over 2 million federal civil cases, challenges the notion that sealing practices are operating as designed. Figure 3 (below) illustrates that among cases that reach summary judgment approximately 10% included at least one court-sealed document. To be sure, however, assessments of whether a 10% figure comports with a "famously strict" threshold are necessarily subjective. An excerpted abstract follows Figure 3.

Charging "Handoffs" Between Police and Prosecutors

While prosecutorial charging decisions occupy a central position in the American criminal legal system, data access has severely constrained related empirical research. In a recent paper, The Police-Prosecutor Charging Decision, Shima Baradaran Baughman et al. (BYU) report initial descriptive results that benefit from "rare" 2019 charging data from a single (anonymous) "mid-sized" U.S. county. 

Specifically, the data include a "random sample of 414 unique cases files and 1340 charges [from 2019]. For every charge, the dataset links three decision points: (1) the offense(s) recommended by the arresting agency, (2) the offense(s) the prosecutor filed, and (3) the disposition for that charge, indicating how the case was concluded whether by plea agreement, dismissal, a guilty verdict of the original charge, or a guilty verdict of a lesser charge.” Linking police-recommended charges, prosecutor-filed charges, and charge-level dispositions within the same cases provides an unusual glimpse into the critical arrest-to-filing transition.

One Local Prosecutor "Paradox"

In many ways, local prosecutors perform often critical roles in the nation's criminal justice system. While a recent, albeit small, surge of "reform" prosecutors already shows signs of abating, their emergence emphasizes a paradox. As Joshua Boston (BGSU--poli sci) et al. note in their recent paper, The Prosecutor Paradox: Understanding the Public’s Low Knowledge About Chief Local Prosecutors, despite the considerable discretion afforded to local prosecutors too often voters know very little about them. Moreover, prosecutors' enormous electoral incumbency advantage only compounds problems incident to voter information deficits. While Boston et al. engage survey data to make their case, one key finding includes: "Our data – viewed in concert with existing scholarly evidence on prosecutorial elections and in the context of our motivating examples above – suggest that prosecutorial elections are not effective in providing accountability in most cases." The paper's abstract follows.

CELS 2026: Call For Papers

 

Call for Papers

Conference on Empirical Legal Studies

October 2-3, 2026

 

The 2026 Conference on Empirical Legal Studies (CELS), co-sponsored by Northwestern Pritzker School of Law and the Society for Empirical Legal Studies, is now accepting submissions. CELS will consider empirical papers spanning all areas of empirical legal studies. Authors are encouraged to submit works-in-progress; however, submissions should be completed drafts that include principal results. Submitted papers must be unpublished and expected to be unpublished at the time of the conference.

 

The paper submission deadline is June 12, 2026 (11:59 PM Central Daylight Time). There is no charge for submissions.

 

To submit a paper, please visit here. We welcome replication studies and papers that develop and demonstrate empirical methods.

Papers are selected through a peer-review process. If accepted, authors will have an opportunity to submit a revised draft prior to the conference for presentation and discussion. Discussion at the conference includes assigned commentators and audience questions. Accepted papers will be made available to all conference participants. Authors of accepted papers should expect to serve as a commentator on another paper in the conference.

Additional conference information is available here.

Experimental Evidence Related to Diversity Jurisdiction's Assumptions

While first-year law students are taught that the most common justification for federal diversity jurisdiction involves concerns about potential bias against out-of-state litigants in state courts, empirical attention to whether these bias concerns are warranted is comparatively underdeveloped.

In Diversity Jurisdiction and Out-of-State Bias: Experimental Evidence, Daniel Klerman (USC) and Jonathan Nash (Emory) report results from experiments designed to detect out-of-state bias. What they find, at bottom, is that their results do not “provide uniformly solid evidence for the existence of bias or of federal courts (at least as they are currently constituted) reducing that bias through the policing of lawyer appeals to bias.” The paper's abstract follows.

In Memoriam: Marc Galanter (1931-2026)

It is with sadness that I note the recent passing of Prof. Marc Galanter (Wisc.). As Brian Leiter observes (here), Professor Galanter's scholarly influence runs exceptionally deep. Marc, emeritus at the University of Wisconsin at Madison, where he had taught since the late 1970s, is wide recognized as "one of the most important figures in law & society scholarship over the past half-century." Colleagues at Wisconsin note that Marc's scholarly focus engages with, in part, "how the legal system, in the U.S. and elsewhere, actually functions in practice. While there are many people who embody our Law in Action tradition, it’s hard to think of a better exemplar." Finally, as a co-editor of the Journal of Empirical Legal Studies (JELS), I note that Marc's canonical contribution to volume 1:3 (2004), The Vanishing Trial: An Examination of Trials and Related Matters in Federal and State Courts, endures as one of JELS' most cited papers.

Data on Plea Offers & Implications for the "Trial Penalty" Hypothesis

While plea offers (and acceptances) are ubiquitous in our criminal justice system, empirical research on the plea bargaining process remains sparse. A recent paper by David Abrams (Penn.) et al., A (Plea) Offer You Can Refuse, sheds interesting and important new empirical light on a practice largely shrouded in secrecy.

The data encompass information on initial plea offers made for felonies between 2012 and 2017 in Philadelphia, and include initial plea offers for 87.4% of cases. These plea data are supplemented by additional data from the Administrative Office of Pennsylvania Courts as well as the Philadelphia Police Dept. The paper draws defendant-case level data from Philadelphia largely because, as the authors note, "it is the only large jurisdiction that has shared information on all plea offers – both those that are accepted and rejected – for a large number of cases." These data are pressed into the service of exploring the prevailing wisdom regarding the imposition of a "trial penalty" on defendants who reject plea offers.

The paper's core finding, implied in Figure 3 (below), surprises: "We find that initial plea offers are significantly longer than sentences for cases not immediately resolved through a plea, even when a person is later convicted at trial."

Figure 3. Plea offer and sentence length by method of case resolution, where defendant is guilty