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Evidence Commons

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Full-Text Articles in Evidence

Visualizing Dna Proof, Nicholas L. Georgakopoulos Aug 2015

Visualizing Dna Proof, Nicholas L. Georgakopoulos

Nicholas L Georgakopoulos

DNA proof inherently involves the use of probability theory, which is often counterintuitive. Visual depictions of probability theory, however, can clarify the analysis and make it tractable. A DNA hit from a large database is a notoriously difficult probabi­li­ty theory issue, yet the visuals should enable courts and juries to handle it. The Puckett facts are an example of a general approach: A search in a large DNA database produces a hit for a cold crime from 1972 San Francisco. Probability theory allows us to process the probabilities that someone else in the database, someone not in the database, or …


Inefficient Evidence, Alex Stein Dec 2014

Inefficient Evidence, Alex Stein

Alex Stein

Why set up evidentiary rules rather than allow factfinders to make decisions by considering all relevant evidence? This fundamental question has been the subject of unresolved controversy among scholars and policymakers since it was raised by Bentham at the beginning of the nineteenth century. This Article offers a surprisingly straightforward answer: An economically minded legal system must suppress all evidence that brings along a negative productivity-expense balance and is therefore inefficient. Failure to suppress inefficient evidence will result in serious diseconomies of scale. To operationalize this idea, I introduce a “signal-to-noise” method borrowed from statistics, science, and engineering. This method …


The New Doctrinalism: Implications For Evidence Theory, Alex Stein Dec 2014

The New Doctrinalism: Implications For Evidence Theory, Alex Stein

Alex Stein

This Article revisits and refines the organizing principles of evidence law: case specificity, cost minimization, and equal best. These three principles explain and justify all admissibility and sufficiency requirements of the law of evidence. The case-specificity principle requires that factfinders base their decisions on the relative plausibility of the stories describing the parties’ entitlement–accountability relationship. The cost-minimization principle demands that factfinders minimize the cost of errors and the cost of avoiding errors as a total sum. The equal-best principle mandates that factfinders afford every person the maximal feasible protection against risk of error while equalizing that protection across the board. …


Understanding The Law Of Evidence Through The Lens Of Signal-To-Noise, Alex Stein Aug 2013

Understanding The Law Of Evidence Through The Lens Of Signal-To-Noise, Alex Stein

Alex Stein

No abstract provided.


Are People Probabilistically Challenged? Book Review Of Daniel Kahneman, Thinking, Fast And Slow (2011), Alex Stein Mar 2013

Are People Probabilistically Challenged? Book Review Of Daniel Kahneman, Thinking, Fast And Slow (2011), Alex Stein

Alex Stein

Daniel Kahneman’s recent book, Thinking, Fast and Slow, is a must-read for any scholar and policymaker interested in behavioral economics. Thus far, behavioral economists did predominantly experimental work that uncovered discrete manifestations of people’s bounded rationality: representativeness, availability, anchoring, overoptimism, base-rate neglect, hindsight bias, loss aversion, and other misevaluations of probability and utility. This work has developed no causal explanations for these misevaluations. Kahneman’s book takes the discipline to a different level by developing an integrated theory of bounded rationality’s causes and characteristics. This theory holds that humans use two distinct modes of reasoning, intuitive (System 1) and deliberative (System …


Evidence, Probability, And The Burden Of Proof, Ronald J. Allen, Alex Stein Dec 2012

Evidence, Probability, And The Burden Of Proof, Ronald J. Allen, Alex Stein

Alex Stein

This Article analyzes the probabilistic and epistemological underpinnings of the burden-of-proof doctrine. We show that this doctrine is best understood as instructing factfinders to determine which of the parties’ conflicting stories makes most sense in terms of coherence, consilience, causality, and evidential coverage. By applying this method, factfinders should try—and will often succeed—to establish the truth, rather than a statistical surrogate of the truth, while securing the appropriate allocation of the risk of error. Descriptively, we argue that this understanding of the doctrine—the “relative plausibility theory”—corresponds to our courts’ practice. Prescriptively, we argue that the relative-plausibility method is operationally superior …


Rethinking The Indefinite Detention Of Sex Offenders, Fredrick E. Vars Dec 2010

Rethinking The Indefinite Detention Of Sex Offenders, Fredrick E. Vars

Fredrick E Vars

Thousands of sex offenders in the United States are being held indefinitely under civil commitment programs. The analysis in this Article suggests that none (or precious few) belong there. Specifically, in a large dataset, an instrument as good as the one most widely used by experts (the “Static-99”) could not identify even one sex offender who met the legal standards for commitment. Supplementing such instruments with additional information appears not to improve matters, so the failure of the instrument is profoundly disturbing. There are three possible responses: (1) improve instruments to meet existing standards; (2) lower the standards; and (3) …


Invisible Ink In The Eighth Arrondissement, Karl T. Muth Dec 2008

Invisible Ink In The Eighth Arrondissement, Karl T. Muth

Karl T Muth

IMPORTANT: This document may prompt you for a username and password. If this occurs, please simply click "cancel" and the document will load. Thank you. This Article deals with the history of the secret contract that governs the distribution of economic rents enjoyed by Formula One. It further explores the environment in which this secret contract evolved and briefly discusses applications for secret contracts in other scenarios and industries.


The Paradox Of Ideology, Justin Schwartz Jan 1993

The Paradox Of Ideology, Justin Schwartz

Justin Schwartz

A standard problem with the objectivity of social scientific theory in particular is that it is either self-referential, in which case it seems to undermine itself as ideology, or self-excepting, which seem pragmatically self-refuting. Using the example of Marx and his theory of ideology, I show how self-referential theories that include themselves in their scope of explanation can be objective. Ideology may be roughly defined as belief distorted by class interest. I show how Marx thought that natural science was informed by class interest but not therefore necessarily ideology. Capitalists have an interest in understanding the natural world (to a …