Comparison of gasolines using gas chromatography-mass spectrometry and target ion response

Gas chromatography-mass spectrometry was used to compare gasoline samples obtained from different sources based on the difference in amounts of certain components found in the headspace of gasoline using target response data. Many suspected arson cases involve comparing an ignitable liquid extracted from fire debris to a liquid found in a suspect's possession to determine if they could have had a common source. Various component ratios are proposed for determining if an unevaporated gasoline sample could have originated from the same source as an evaporated gasoline extracted from fire debris. Fifty and 75% evaporated gasoline samples were both found to contain similar ratios of certain components when compared with its unevaporated source gasoline. The results of the comparisons in this study demonstrate that for cases involving gasoline that has been evaporated up to 50% and extracted from pine, it is possible to eliminate comparison samples as originating from the same source. The results of the 75% comparisons suggest it may be possible to apply the same type of comparison to cases involving 75% evaporated gasoline.     

The Optional Protocol: in the best interest of whom?

Chris Dolan is a PhD candidate at the London School of Economics and Political Science. Between 1998 and 2002, he spent some 24 months conducting fieldwork in northern Uganda.     

The Theory and Practice of “Nudging”: Changing Health Behaviors

Many of the most significant challenges in health care—such as smoking, overeating, and poor adherence to evidence‐based guidelines—will only be resolved if we can influence behavior. The traditional policy tools used when thinking about influencing behavior include legislation, regulation, and information provision. Recently, policy analysts have shown interest in policies that “nudge” people in particular directions, drawing on advances in understanding that behavior is strongly influenced in largely automatic ways by the context within which it is placed. This article considers the theoretical basis for why nudges might work and reviews the evidence in health behavior change. The evidence is structured according to the Mindspace framework for behavior change. The conclusion is that insights from behavioral economics offer powerful policy tools for influencing behavior in health care. This article provides public administration practitioners with an accessible summary of this literature, putting these insights into practical use.     

Pleasing the Principal: U.S. Influence in World Bank Policymaking

How do policies in international organizations reflect the preferences of powerful institutional stakeholders? Using an underutilized data set on the conditions associated with World Bank loans, we find that borrower countries that vote with the United States at the United Nations are required to enact fewer domestic policy reforms, and on fewer and softer issue areas. Though U.S. preferences permeate World Bank decision making, we do not find evidence that borrower countries trade favors in exchange for active U.S. intervention on their behalf. Instead, we propose that U.S. influence operates indirectly when World Bank staff—consciously or unconsciously—design programs that are compatible with U.S. preferences. Our study provides novel evidence of World Bank conditionality and shows that politicized policies can result even from autonomous bureaucracies.     

Demanding the Impossible: War,Bargaining, and Honor

This article shows that honor concerns can influence war initiation and termination decisions. When bargaining implicates status or commitments to in-group members, moral nationalists may experience dishonor—and with it emotions like shame and humiliation—when they have to make concessions. These honor costs are different from other costs because they can sometimes be vindicated through costly action. Including these costs in a basic, complete information bargaining model demonstrates that honor concerns can give rise to a “fight, then agree” equilibrium. These influences of honor on war initiation and termination are illustrated with case studies of British decisions in the 1982 Falklands War and French decisions during the 1940 invasion of France.