In Defense of Comparative Statics: Specifying Empirical Tests of Models of Strategic Interaction

Christopher Zorn Department of Political Science, University of South Carolina, Columbia, SC 29208 e-mail: zorn{at}sc.edu e-mail: ccarrub{at}emory.edu (corresponding author) Beginning in 1999, Curtis Signorino challenged the use of traditionallogits and probits analysis for testing discrete-choice, strategicmodels. Signorino argues that the complex parametric relationshipsgenerated by even the simplest strategic models can lead towildly inaccurate inferences if one applies these traditionalapproaches. In their stead, Signorino proposes generating stochasticformal models, from which one can directly derive a maximumlikelihood estimator. We propose a simpler, alternative methodologyfor theoretically and empirically accounting for strategic behavior.In particular, we propose carefully and correctly deriving one'scomparative statics from one's formal model, whether it is stochasticor deterministic does not particularly matter, and using standardlogit or probit estimation techniques to test the predictions.We demonstrate that this approach performs almost identicallyto Signorino's more complex suggestion. Authors' note: We would like to thank Randy Calvert, Mark Hallerberg,Andrew Martin, Eric Reinhardt, Chris Stanton, and Craig Voldenfor their valuable feedback on this project. All remaining errorsare our own. Replication materials are available at the PoliticalAnalysis Web site.     

The forgotten ones

To date, internecine violence in the Darfur region of Sudan has claimed the lives of 400,000 civilians (Coalition for International Justice March 2006); more than 2 million people have been displaced and countless more have been raped, robbed, intimidated and suffered other depredations of a collapsed social structure. The origins and continued enactment of the conflict is far more complex than is currently reflected in either the discourse of the Sudanese government or international political actors. In this paper, the authors present a rich history of the conflicts within the Darfur region of Sudan while drawing upon the extant state crime literature to both conceptually frame and theoretically illuminate the genocide. Through such an examination, not only does the paper present a holistic assessment of the multitude of social forces and conditions behind the events, but also extends the existing literature on both state criminality and genocide.

Posttraumatic Stress Disorder and Removal from Home as a Primary, Secondary, or Disclaimed Trauma in Maltreated Adolescents

Posttraumatic stress disorder (PTSD) is common among maltreated youth but it remains unclear as to whether removal from home is as traumatizing as the maltreatment. This study examined 250 maltreated adolescents aged 11–17?years who were grouped on the basis of whether they (1) endorsed removal from home as their primary traumatic event, (2) endorsed removal from home as a secondary traumatic event, but not their primary traumatic event, or (3) did not endorse removal from home as traumatic. PTSD diagnoses as well as symptoms of PTSD, dissociation, depression, posttraumatic cognitions, and anger expression were measured. Adolescents who endorsed removal from home as their primary traumatic event reported significantly lower levels of PTSD and related symptoms than adolescents in the other groups. The findings are discussed within the context of transactions surrounding removal from home and support previous work that PTSD is a critical concern regarding many maltreated youth.     

Exploring the age of onset and recurrence of childhood animal cruelty: can animal cruelty be learned from witnessing others commit it?

Despite recent research, few studies have examined the specific social contexts in which animal cruelty may be learned. Using data collected from 180 inmates at a medium- and maximum-security prison in a southern state, the authors seek to replicate findings from the Hensley and Tallichet study that examined the potential for the onset and recurrence of childhood animal cruelty to become a learned behavior, specifically in terms of demographic characteristics and childhood experiences with witnessing animal abuse. In the current study, those who were younger when they first witnessed animal cruelty initially hurt or killed animals themselves at a younger age. Respondents who had witnessed a family member hurt or kill animals reported engaging in recurrent animal cruelty and were older when they committed their first act of animal cruelty.     

The predictive value of childhood animal cruelty methods on later adult violence: examining demographic and situational correlates

The present study seeks to replicate Tallichet, Hensley, and Singer's research on childhood animal cruelty methods by using a sample of 180 male inmates surveyed at both medium- and maximum-security prisons in a southern state. The purpose of the current study was to first reexamine the relationship between demographic and situational factors and specific methods of childhood animal cruelty. Second, the correlation between an abuser's chosen method(s) of childhood animal cruelty on later recurrent acts of adult violent crimes was reinvestigated. Regression analyses revealed that respondents who engaged in frequent animal cruelty were more likely to have drowned, shot, kicked, or had sex with animals. Those who had grown up in urban areas and those who did not become upset after abusing animals were more likely to have kicked animals. Respondents who covered up their abuse were more likely to have had sex with animals. Sex with animals was the only method of childhood animal cruelty that predicted the later commission of adult violent crimes.     

The Effect of Requiring Private Employers to Extend Health Benefit Eligibility to Same‐Sex Partners of Employees: Evidence from California

Health disparities related to sexual orientation are well documented and may be due to unequal access to a partner's employer‐sponsored insurance (ESI). We provide the literature's first evaluation of legislation enacted by California in 2005 that required private employers within the state to treat employees in committed same‐sex relationships in the same way as employees in different‐sex marriages with respect to ESI. Our analysis uses data on sexual orientation, partnership, and health insurance from the 2001 to 2007 California Health Interview Surveys (CHIS). Prior to the reform, partnered gay men and lesbians were significantly less likely to have ESI in someone else's name than partnered heterosexuals. Pooling data from 2001 to 2007, we find that the reform had no effects on differences in insurance outcomes between gay and straight men. We find some evidence that the reform increased partnership, reduced full‐time employment, and increased health insurance coverage among lesbians relative to heterosexual women. The increases in insurance coverage for lesbians are consistent with a role for expanded dependent ESI, suggesting that such policies may reduce sexual orientation‐based insurance disparities among women.