The War Against Drug Producers

This paper develops a model of a war against the producers of illegal hard drugs. This war occurs on two fronts. First, to prevent the cultivation of crops that are the raw material for producing drugs the state engages the drug producers in conflict over the control of arable land. Second, to impede further the production and exportation of drugs the state attempts to eradicate crops and to interdict drug shipments. The model also includes an interested outsider who uses both a stick and a carrot to strengthen the resolve of the state in its war against drug producers. The results of the calibration of the model yield an estimate that from 2001 through 2003 subsidies from the United States to the Colombian armed forces under Plan Colombia caused a decrease in the exportation of drugs from Colombia to about 44 percent of what exportation was before Plan Colombia was implemented. The results of the calibration of the model also suggests that a more efficient allocation of the about $2 billion that the United States spent on Plan Colombia through 2003 would have involved larger subsidies to the conflict over control of arable land and smaller subsidies to eradication and interdiction efforts.

Fragmentation in Mental Health Benefits and Services: A Preliminary Examination into Consumption and Outcomes

In this chapter, we examine consumption patterns and health outcomes within a health insurance system in which mental health benefits are administered under a carved-out insurance plan. Using a comprehensive dataset of health claims, including insurance claims for both mental and physical health services, we examine both heterogeneity of consumption and variation in outcomes. Consumption variation addresses the regularly overlooked question of how equal insurance and access does not translate into equitable consumption. Outcomes variation yields insights into the potential harms of disparate consumption and of uncoordinated care. We find that even when insurance and access are held constant, consumption of mental health services varies dramatically across race and class. We are unable, however, to find any evidence that higher levels of consumption correspond with improved health when health status is controlled. We also find some evidence of the costs of fragmentation, such as uncoordinated care, low adherence rates, and variation in sources of care. These findings have important implications for both the delivery of health services and the administration of health insurance benefits

Υ\Upsilon and ψ\psi leptonic decays as probes of solutions to the RD(∗)R_D^{(*)} puzzle

Experimental measurements of the ratios $R(D^{(*)})\equiv\frac{\Gamma(B\to D^{(*)}\tau\nu)}{\Gamma(B\to D^{(*)}\ell\nu)}$ ($\ell=e,\mu$) show a $3.9\sigma$ deviation from the Standard Model prediction. In the absence of light right-handed neutrinos, a new physics contribution to $b\to c\tau\nu$ decays necessarily modifies also $b\bar b\to\tau^+\tau^-$ and/or $c\bar c\to\tau^+\tau^-$ transitions. These contributions lead to violation of lepton flavor universality in, respectively, $\Upsilon$ and $\psi$ leptonic decays. We analyze the constraints resulting from measurements of the leptonic vector-meson decays on solutions to the $R(D^{(*)})$ puzzle. Available data from BaBar and Belle can already disfavor some of the new physics explanations of this anomaly. Further discrimination can be made by measuring $\Upsilon(1S,2S,3S)\to\tau\tau$ in the upcoming Belle II experiment.Comment: Version published in JHEP, 17 pages, 7 figure

Mindfulness-Based Stress Reduction: Impact on the Acoustic Startle Response

Previous research has demonstrated that the magnitude and duration of the acoustic startle response can be modulated by a number of psychological factors. Mindfulness meditation, being a form of mental training known to produce benefits in affect and attention regulation as well as other domains, may modulate factors of the acoustic startle response. The present study investigated participants’ skin conductance responses to an acoustic startle stimulus before and after an 8-week Mindfulness-Based Stress Reduction (MBSR) course, and paired this assessment with self-reported trait mindfulness and positive and negative affect. There was significant startle habituation across the intervention, but no between groups differences on startle magnitude. Self-report measurement yielded significant increases in negative affect for the control group, and significant increases in trait mindfulness for the MBSR group, but this did not relate to changes in startle magnitude. Importantly, it was found that MBSR participants tended to be significantly more likely than controls to report mindful breathing at the post-intervention startle trial. Although startle magnitude was not significantly affected by MBSR enrollment, behavior during the startle trial may have been significantly affected