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Complete Explanation (complete + explanation)
Selected AbstractsTheories of drug craving, ancient and modernADDICTION, Issue 1 2001D. Colin Drummond This paper reviews the principal theoretical models of drug craving and provides some directions for future research. The main models are classified broadly into three categories: (1) phenomenological models; based on clinical observation and description; these have been influential in classification systems of addictive disorders and in the development of pharmacological therapies; (2) conditioning models: based on conditioning theory; these have been influential in the development of cue exposure treatments; (3) cognitive theories; based on cognitive social learning theory: these have been influential in the development of cognitive therapies of addiction. It is concluded that no one specific theory provides a complete explanation of the phenomenon of craving. However, theories of craving grounded in general theories of human behaviour offer greatest promise, and generate more specific and testable research hypotheses. Theories that do not require craving to be present for relapse to occur have more empirical support than those that provide simplistic causal explanations. The cue-reactivity model shows promise in the exploration of the relationship between craving and relapse. However, further attention to the phenomenology of craving could help to advise the future measurement and study of drug craving, particularly in the context of research in which drugs are available to human subjects, with adequate ethical safeguards. There is a need for further study of the temporal dynamics of craving and consensus in the field on the most appropriate methods of measurement. Finally, new psychotherapies such as cue exposure and pharmacotherapies that aim to attenuate drinking behaviour, such as naltrexone and acamprosate, provide opportunities to improve understanding of the nature and significance of craving. However, the relatively uncritical assumption that craving is the underlying basis of addiction and represents the most appropriate target for treatment is challenged. [source] "Stuff Happens": Donald Rumsfeld and the Iraq WarFOREIGN POLICY ANALYSIS, Issue 4 2009Stephen Benedict Dyson Secretary of Defense Donald Rumsfeld exercised great influence over U.S. policies in the invasion and subsequent occupation of Iraq. The Secretary's leadership presents a puzzle,accounts agree that Rumsfeld was a masterful bureaucratic infighter who ruthlessly gained control over the major decisions and marginalized colleagues, yet, having secured that control, was remarkably blasé about events on the ground in Iraq. I argue that Rumsfeld's paradoxical performance was rooted in key aspects of his worldview,measured through systematic content analysis of his verbal output on the principle that the words individuals say are related to the way they see the world,and his bureaucratic style, identified through interviews with Bush administration insiders. Rumsfeld's worldview centers on a low perception of the control of self in relation to macro-political events, and a very high conceptual complexity, indicating a nuanced view of issues. This low perception of control and heavily contingent worldview is the discursive, "stuff happens" side of Rumsfeld which so frustrated critics of the U.S. occupation. His bureaucratic style, however, was controlling, suspicious, and overbearing. I suggest that this approach offers a more complete explanation of Rumsfeld's actions, and so contributes to understanding of the Iraq story, as it is rooted in consideration of the basic dispositions that condition how individuals approach their roles. [source] The Spread of Bureaucratic Oversight Mechanisms across Intergovernmental Organizations,INTERNATIONAL STUDIES QUARTERLY, Issue 3 2010Alexandru Grigorescu The study asks why so many intergovernmental organizations (IGOs) have established recently offices and policies intended to facilitate the oversight of their bureaucracies. It begins from a set of hypotheses derived from the principal-agent (PA) literature, a natural starting point for answering this question. It then considers explanations based on norms and institutional diffusion to offer a more complete explanation of developments. The study argues that the empowerment of democratic norms and institutional diffusion processes across IGOs have altered member-states' preferences and allowed them to overcome collective action problems involved in the adoption of oversight mechanisms. The hypotheses are tested across more than 70 organizations. The results suggest that arguments extracted from the PA literature and the one on norms allow us to understand which IGOs are more likely to have bureaucratic oversight mechanisms. On the other hand, models that also take into account diffusion processes allow us to understand better when such mechanisms are adopted. [source] The Persistence and Pricing of the Cash Component of EarningsJOURNAL OF ACCOUNTING RESEARCH, Issue 3 2008PATRICIA M. DECHOW ABSTRACT Prior research shows that the cash component of earnings is more persistent than the accrual component. We decompose the cash component into: (1) the change in the cash balance, (2) issuances/distributions to debt, and (3) issuances/distributions to equity. We find that the higher persistence of the cash component is entirely due to the subcomponent related to equity. The other subcomponents have persistence levels almost identical to accruals. We investigate whether investors understand the implications of the differential persistence of the three subcomponents. Our results suggest that investors correctly price debt and equity issuances/distributions but misprice the change in the cash balance in a similar manner to accruals. Our tests enable us to empirically distinguish the "accrual" and "external financing" anomalies with results implying that the accrual anomaly subsumes the external financing anomaly. Our results also suggest that naive fixation on earnings is unlikely to be a complete explanation for the accrual anomaly. Our findings are more consistent with investors misunderstanding diminishing returns to new investments. [source] Reconstructing asymmetrical reproductive character displacement in a periodical cicada contact zoneJOURNAL OF EVOLUTIONARY BIOLOGY, Issue 3 2006JOHN R. COOLEY Abstract Selection against costly reproductive interactions can lead to reproductive character displacement (RCD). We use information from patterns of displacement and inferences about predisplacement character states to investigate causes of RCD in periodical cicadas. The 13-year periodical cicada Magicicada neotredecim exhibits RCD and strong reproductive isolation in sympatry with a closely related 13-year species, Magicicada tredecim. Displacement is asymmetrical, because no corresponding pattern of character displacement exists within M. tredecim. Results from playback and hybridization experiments strongly suggest that sexual interactions between members of these species were possible at initial contact. Given these patterns, we evaluate potential sources of selection for displacement. One possible source is ,acoustical interference', or mate-location inefficiencies caused by the presence of heterospecifics. Acoustical interference combined with the species-specificity of song pitch and preference appears to predict the observed asymmetrical pattern of RCD in Magicicada. However, acoustical interference does not appear to be a complete explanation for displacement in Magicicada, because our experiments suggest a significant potential for direct sexual interactions between these species before displacement. Another possible source of selection for displacement is hybrid failure. We evaluate the attractiveness of inferred hybrid mating signals, and we examine the viability of hybrid eggs. Neither of these shows strong evidence of hybrid inferiority. We conclude by presenting a model of hybrid failure related to life cycle differences in Magicicada. [source] | ||||||||||