Statistics is a Plural Word


Steven L. Willborn and Romana L. Paetzold

Responding to D. James Greiner, Causal Inference in Civil Rights Litigation, 122 Harv. L. Rev. 533 (2008)

In Causal Inference in Civil Rights Litigation, Professor James Greiner argued that regression analysis is ill-suited and overused as a tool to prove causation in civil rights cases, suggesting that potential outcomes, another statistical technique, should be used instead. In this response, Dean Willborn and Professor Paetzold, although recognizing the limitations of regression analysis, argue that potential outcomes does not necessarily provide a superior way of examining data in civil rights cases. Indeed, they demonstrate how most of the problems Professor Greiner attributes to regression also apply to the potential outcomes approach. This is almost inevitable since potential outcomes would use some form of regression as part of the analysis in most civil rights cases. Furthermore, they disagree with Professor Greiner’s claim that regression lacks an adequate framework for making causal inferences. Although regression cannot prove causation, no statistical method can do that, including the potential outcomes approach. Instead, regression calls on the same basic causal framework used throughout discrimination law and, indeed, the same basic causal framework used by potential outcomes. Dean Willborn and Professor Paetzold argue that the best approach is to allow experts to use the full toolbox of statistical techniques so that a case can be viewed from multiple angles. Statistics will be more valuable in civil rights cases when properly treated as a plural word.



122 Harv. L. Rev. F. 48 (2008) | DOWNLOAD PDF

Online Forum

Freeing Employee Choice: The Case For Secrecy in Union Organizing and Voting

Cynthia Estlund :: In his article Enabling Employee Choice, Professor Benjamin Sachs provided a nuanced analysis of what is wrong both with current law and with the leading reform proposal. In this response, Professor Cynthia Estlund argues that Professor Sachs’s reform proposal is likely to set the terms for future scholarly analysis and for serious public debate over the role of law in union organizing regardless of the fate of labor law reform in the current Congress. READ MORE

Not All Statistics Are Created Equal

D. James Greiner :: In Statistics Is a Plural Word, a response to my article Causal Inference in Civil Rights Litigation, Dean Steven Willborn and Professor Ramona Paetzold take issue both with my critique of regression as it is currently used in civil rights litigation and with my advocacy of the potential outcomes framework. In this Reply, I argue that Dean Willborn and Professor Paetzold’s response does not address (and thus cannot refute) the central lessons of Causal Inference, despite purporting to agree with those lessons. In particular, after “agree[ing] wholeheartedly” that a definition of a causal effect is necessary for the use of statistics in civil rights, Plural does not offer a definition. In the absence of such a definition, the purpose of statistics in civil rights litigation is unclear. The potential outcomes framework, in contrast, provides the needed definition and clarifies many subsidiary concepts, with salutary consequences following naturally from a start in the right place. READ MORE

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