Racial Residential Segregation and Social Control: A Panel Study of the Variation in Police Strength Across U.S Cities, 1980–2010

Despite a great deal of theoretical and empirical attention given to racial residential segregation and its influence on a number of social problems in the United States, few scholars have examined the role that this persistent form of racial inequality plays in shaping the magnitude of formal social control efforts. Our study examines this relationship by assessing the potential influence that the isolation of minorities may have on efforts to control crime in urban centers across the United States. Using a pooled time-series regression technique well suited for the analysis of aggregate, longitudinal data, we assess the potential influence of racial segregation on the size of municipal police departments in 170 U.S. cities between 1980 and 2010. After accounting for minority group size, economic threat, crime, and disorganization, we find that racial residential segregation has a significant non-linear effect on police force size. Cities with the most racially integrated populations have the smallest police presence but at very high levels of segregation, police strength levels off. This finding is consistent with expectations derived from the contact hypothesis. Under such conditions, majority group members appear to be less inclined to demand greater crime control measures such as increased police protection. Period interactions with residential segregation also suggest that this relationship has grown stronger in each decade since 1980. Overall, our study provides strong support for threat theories and the contact hypothesis but offers necessary refinements.     

中国治理空中“堵车”奥运期间将接受考验

中国政府终于同意向民用航空开放更多空域，此举应该能让那些饱受航班延误之苦的旅客们松口气了。     

PE‐Swab Direct STR Amplification of Forensic Touch DNA Samples

The PE‐Swab direct STR amplification workflow was developed to process low‐level “touch DNA” samples. In this workflow, a forensic sample is first collected on a 4‐mm PE‐Swab (a novel sample collection device); two 2‐mm punches containing collected samples are then generated from the PE‐Swab and directly amplified for STR typing. Compared to the conventional STR workflow, which involves DNA extraction, purification, and elution volume reduction, the PE‐Swab direct STR amplification workflow does not require sample preparation and takes <60 sec before a touch sample is ready for STR amplification. Because there is no DNA loss due to sample preparation, the PE‐Swab workflow is more sensitive than the conventional STR workflow. The average peak height per sample obtained by the PE‐swab workflow is 3 times higher than that from the conventional workflow with both low‐level single source and two‐contributor mixture samples tested in this study.     

Unrequited Moderation: Credible Commitments and State Repression in Egypt

In strategic accounts of democratization, credible commitments by the opposition shape whether incumbents will relinquish power. Revisiting Kalyvas’s study of Algeria and Belgium, this article introduces evidence from Egypt that shows the structural readiness of incumbents remains as consequential as commitment credibility. During the period 1990–2008 the credibility of democratic commitments by the Egyptian opposition improved along the lines identified by Kalyvas. Unlike its Algerian counterpart, the Islamic movement in Egypt was able to “silence the radicals” and, after 1998, emit a non-dissonant message of electoral participation without militia violence. This improvement in commitment credibility was not reciprocated by Egyptian elites, who enjoyed western support and a sturdy repressive apparatus. Similar factors obstructed the Algerian opposition and they indicate a more disciplined, less dissonant Islamic party would have been unlikely to effect a democratic transition. Transitions are most likely when a credibly committed opposition faces an elite ready to rotate power. The second factor helps explain the success of the Catholic party in Belgium and the failure of comparable Islamic movements in North Africa.     

Bilateral Investment Treaties,Credible Commitment,and the Rule of (International) Law: Do BITs Promote Foreign Direct Investment?

A long line of research, beginning with Macaulay's (1963) well‐known study of “Non‐Contractual Relations in Business,” suggests that the formal trappings of domestic law often have effects on private behavior that are, at best, “indirect, subtle, and ambiguous” ( Macaulay 1984 :155). Law and society scholars have spent somewhat less time exploring whether international law's effects on behavior are similarly attenuated. In this article I examine whether foreign investors take the presence of strong formal international legal protections into account when deciding where to invest. I focus on whether the presence of bilateral investment treaties, or BITs, meaningfully influences investment decisions. I present results from a statistical analysis that examines whether the formally strongest BITs—those that guarantee investors access to international arbitration to enforce investors' international legal rights—are associated with greater investment flows. I find no clear link between treaty protections and investment, a finding consistent with past law and society research but in tension with claims common in the BIT literature that the treaties should have dramatic effects on investor behavior.