Signaling Alliance Commitments: Hand‐Tying and Sunk Costs in Extended Nuclear Deterrence

How can states signal their alliance commitments? Although scholars have developed sophisticated theoretical models of costly signaling in international relations, we know little about which specific policies leaders can implement to signal their commitments. This article addresses this question with respect to the extended deterrent effects of nuclear weapons. Can nuclear states deter attacks against their friends by simply announcing their defense commitments? Or must they deploy nuclear weapons on a protégé's territory before an alliance is seen as credible? Using a new dataset on foreign nuclear deployments from 1950 to 2000, our analysis reveals two main findings. First, formal alliances with nuclear states appear to carry significant deterrence benefits. Second, however, stationing nuclear weapons on a protégé's territory does not bolster these effects. The analysis yields new insights about the dynamics of “hand‐tying” and “sunk cost” signals in international politics.     

Climate change refugees

Under the UNHCR definition of a refugee, set out in the 1967 Protocol Relating to the Status of Refugees, people fleeing their homes because of natural disasters or other environmental problems do not qualify for refugee status and the protection that come from such status. In a recent paper, I defended the essentials of the UNHCR definition on the grounds that refugee status and protection is best reserved for people who can only be helped by granting them refuge in a safe state for an indefinite period of time, and argued that this does not include most people fleeing from natural disasters. This claim is most strongly challenged by the possibility of displacement from climate change. In this paper, I will explore to what degree the logic of the refugee convention, as set out in my earlier paper, can and should be extended to those fleeing the results of climate change.     

Cultivating Youth Engagement: Race & the Behavioral Effects of Critical Pedagogy

Political Behavior - Political scientists attribute gaps in participation between whites and people of color to unequal access to political resources, political efficacy, and weak affiliations to...     

Improving police response to persons with mental illness: a multi-level conceptualization of CIT

The large numbers of people with mental illness in jails and prisons has fueled policy concern in all domains of the justice system. This includes police practice, where initial decisions to involve persons in the justice system or divert them to mental health services are made. One approach to focus police response in these situations is the implementation of Crisis Intervention Teams (CIT). The CIT model is being implemented widely, with over 400 programs currently operating. While the limited evidence on CIT effectiveness is promising, research on CIT is limited in scope and conceptualization-much of it focusing on officer characteristics and training. In this paper we review the literature on CIT and present a conceptual model of police response to persons with mental illness that accounts for officer, organizational, mental health system and community level factors likely to influence implementation and effectiveness of CIT and other approaches. By moving our conceptualizations and research in this area to new levels of specificity, we may contribute more to effectiveness research on these interventions.     

Controlled electrostatic methodology for imaging indentations in documents

The electrostatic process for imaging indentations on documents using the ESDA device is investigated under controlled experimental settings. An in-house modified commercial xerographic developer housing is used to control the uniformity and volume of toner deposition, allowing for reproducible image development. Along with this novel development tool, an electrostatic voltmeter and fixed environmental conditions facilitate an optimization process. Sample documents are preconditioned in a humidity cabinet with microprocessor control, and the significant benefit of humidification above 70% RH on image quality is verified. Improving on the subjective methods of previous studies, image quality analysis is carried out in an objective and reproducible manner using the PIAS-II. For the seven commercial paper types tested, the optimum ESDA operating point is found to be at an electric potential near -400V at the Mylar surface; however, for most paper types, the optimum operating regime is found to be quite broad, spanning relatively small electric potentials between -200 and -550V. At -400V, the film right above an indented area generally carries a voltage which is 30-50V less negative than the non-indented background. In contrast with Seward's findings [G.H. Seward, Model for electrostatic imaging of forensic evidence via discharge through Mylar-paper path, J. Appl. Phys. 83 (3) (1998) 1450-1456; G.H. Seward, Practical implications of the charge transport model for electrostatic detection apparatus (ESDA), J. Forensic Sci. 44 (4) (1999) 832-836], a period of charge decay before image development is not required when operating in this optimal regime. A brief investigation of the role played by paper-to-paper friction during the indentation process is conducted using our optimized development method.     

PARALLEL IMPORTATION AND SERVICE QUALITY: AN EMPIRICAL INVESTIGATION OF COMPETITION BETWEEN DVDS AND CINEMAS IN NEW ZEALAND

Investigations into the causes and effects of parallel importinghave concentrated on price discrimination, but arbitrage canalso occur on non-price dimensions. Using a natural experimentin the New Zealand film distribution industry between May 1998and November 2001, we examine the effect of parallel importingon quality as it relates to the timing of the availability offilm media. We demonstrate that (a) cinema revenues were underminedas consumers substituted viewing films on parallel importedDVDs for the cinema format and (b) that studios responded tothe threat of parallel imported DVDs by bringing forward therelease of films into New Zealand cinemas. The reduced delaybetween US and New Zealand cinematic release dates is shownto be consistent with the introduction of competition when timingis a dimension of quality and choice. We conclude that parallelimportation of DVDs almost certainly resulted in a net increasein welfare in New Zealand.