International evidence on the stability of the optimizing IS equation

In this paper we provide international evidence on the issue of whether the optimizing IS equation is more stable than a backward-looking alternative. The international evidence consist of estimates of IS equations on quarterly data for the UK and Australia, both for the full sample of the last 40 years and for the period following major monetary policy shifts in 1979-80. Our results suggest that the parameters in the optimizing IS equations are more empirically stable than those of the backward-looking alternative. The use of dynamic general equilibrium modelling in empirical work does deliver material benefits, in the form of equations that are more suitable for monetary policy analysis.Monetary policy ; Macroeconomics ; Econometric models

The Association between Domestic Violence, HIV Status and Consent to Testing Among Zambian Women

In the past twenty years a global trend has emerged illustrating increasing rates of violence against women, with HIV rates among this population also steadily on the rise. Despite the burden of the problem, there is scant corpus of literature exploring the influence of domestic violence on HIV. Therefore, this study examined the association between domestic violence and women’s decision to consent to HIV testing, and their HIV status. Using the 2007 Zambia Demographic and Health Survey, it was found that Zambian women who have experienced domestic violence are 13% more likely to consent to an HIV test. After adjusting for residence as a confounder, women who had experienced domestic violence were 11% more likely to test positive for HIV. Studies similar to this one could provide the basis for future policy and program planning that would have significant implications on violence against women in HIV prevalent populations

U.K. inflation targeting and the exchange rate

The United Kingdom*s monetary policy strategy is one of floating exchange rates and inflation forecast targeting, with the targeted measure referring to consumer prices. We consider whether it is welfare-reducing to target inflation in the CPI rather than in a narrower index; and the role of the exchange rate in the transmission of monetary policy actions to CPI inflation. We argue that it is appropriate to model imports as intermediate goods rather than as goods consumed directly by households. This leads to a simpler transmission mechanism of monetary policy, while also offering a sustainable explanation fore the weakness of the exchange rate/inflation relationship and making consumer price inflation an appropriate monetary policy target.Inflation (Finance) - Great Britain ; Foreign exchange rates - Great Britain

Field efficacy evaluation and post-treatment contamination risk assessment of an ultraviolet disinfection and safe storage system.

Inconsistent use of household water treatment and safe storage (HWTS) systems reduces their potential health benefits. Ultraviolet (UV) disinfection is more convenient than some existing HWTS systems, but it does not provide post-treatment residual disinfectant, which could leave drinking water vulnerable to recontamination. In this paper, using as-treated analyses, we report on the field efficacy of a UV disinfection system at improving household drinking water quality in rural Mexico. We further assess the risk of post-treatment contamination from the UV system, and develop a process-based model to better understand household risk factors for recontamination. This study was part of a larger cluster-randomized stepped wedge trial, and the results complement previously published population-level results of the intervention on diarrheal prevalence and water quality. Based on the presence of Escherichia coli (proportion of households with ≥ 1 E. coli/100 mL), we estimated a risk difference of -28.0% (95% confidence interval (CI): -33.9%, -22.1%) when comparing intervention to control households; -38.6% (CI: -48.9%, -28.2%) when comparing post- and pre-intervention results; and -37.1% (CI: -45.2%, -28.9%) when comparing UV disinfected water to alternatives within the household. We found substantial increases in post-treatment E. coli contamination when comparing samples from the UV system effluent (5.0%) to samples taken from the storage container (21.1%) and drinking glasses (26.0%). We found that improved household infrastructure, additional extractions from the storage container, additional time from when the storage container was filled, and increased experience of the UV system operator were associated with reductions in post-treatment contamination. Our results suggest that the UV system is efficacious at improving household water quality when used as intended. Promoting safe storage habits is essential for an effective UV system dissemination. The drinking glass appears to represent a small but significant source of recontamination that is likely to impact all HWTS systems

Drivers of Microbial Risk for Direct Potable Reuse and de Facto Reuse Treatment Schemes: The Impacts of Source Water Quality and Blending.

Although reclaimed water for potable applications has many potential benefits, it poses concerns for chemical and microbial risks to consumers. We present a quantitative microbial risk assessment (QMRA) Monte Carlo framework to compare a de facto water reuse scenario (treated wastewater-impacted surface water) with four hypothetical Direct Potable Reuse (DPR) scenarios for Norovirus, Cryptosporidium, and Salmonella. Consumer microbial risks of surface source water quality (impacted by 0-100% treated wastewater effluent) were assessed. Additionally, we assessed risks for different blending ratios (0-100% surface water blended into advanced-treated DPR water) when source surface water consisted of 50% wastewater effluent. De facto reuse risks exceeded the yearly 10-4 infections risk benchmark while all modeled DPR risks were significantly lower. Contamination with 1% or more wastewater effluent in the source water, and blending 1% or more wastewater-impacted surface water into the advanced-treated DPR water drove the risk closer to the 10-4 benchmark. We demonstrate that de facto reuse by itself, or as an input into DPR, drives microbial risks more so than the advanced-treated DPR water. When applied using location-specific inputs, this framework can contribute to project design and public awareness campaigns to build legitimacy for DPR

Natural Photosensitizers in Constructed Unit Process Wetlands: Photochemical Characterization and Inactivation of Pathogen Indicator Organisms

Dissolved organic matter (DOM) is a natural photosensitizer that contributes to the inactivation of microbial pathogens. In constructed treatment wetlands with open water areas DOM can promote sunlight disinfection of wastewater effluent, but a better understanding of DOM spectroscopic and photochemical properties and how they are impacted by different unit process wetlands is needed to inform design. The goals of this study were: (1) to investigate whether DOM isolates realistically represent the photochemistry of the source DOM in its original water and (2) to observe how changes of DOM along a treatment wetland affect its photochemistry, including pathogen inactivation. A pilot scale unit process wetland was studied that consisted of three different cells (open water, cattail, and bulrush) fed by secondary wastewater effluent. DOM was isolated using solid-phase extraction (SPE), photochemically characterized, and compared to the original water samples and standard DOMs. For MS2 coliphage, a virus indicator, the most efficient photosensitizer was the wastewater DOM isolated from the influent of the wetland, while for the bacterial indicator Enterococcus faecalis, inactivation results were comparable across wetland isolates. SPE resulted in isolation of 47% to 59% of whole water DOM and enriched for colored DOM. Singlet oxygen precursors were efficiently isolated, while some excited triplet state precursors remained in the extraction discharge. DOM processing indicators such as SUVA254, SUVA280, and spectral slopes including E2/E3 ratios were reflected in the isolates. Photoinactivation of MS2 was significantly lower in both the reconstituted water samples and isolates compared to the original water sample, possibly due to disturbance of the trans-molecular integrity of DOM molecules by SPE that affects distance between MS2 and DOM sites with locally higher singlet oxygen production. For E. faecalis, results were similar in original water samples and isolates. Higher sorption of DOM to E. faecalis was roughly correlated with higher photoinactivation rates. To enhance sunlight disinfection in unit process wetlands, there is no advantage to placing open water cells after vegetated cells, as passage through the vegetated cells led to increased light absorption and lower singlet oxygen and triplet-state quantum yields and steady state concentrations

A global, spatially-explicit assessment of irrigated croplands influenced by urban wastewater flows

When urban areas expand without concomitant increases in wastewater treatment capacity, vast quantities of wastewater are released to surface waters with little or no treatment. Downstream of many urban areas are large areas of irrigated croplands reliant on these same surface water sources. Case studies document the widespread use of untreated wastewater in irrigated agriculture, but due to the practical and political challenges of conducting a true census of this practice, its global extent is not well known except where reuse has been planned. This study used GIS-based modeling methods to develop the first spatially explicit estimate of the global extent of irrigated croplands influenced by urban wastewater flows, including indirect wastewater use. These croplands were further classified by their likelihood of using poor quality water based on the spatial proximity of croplands to urban areas, urban wastewater return flow ratios, and proportion of wastewater treated. This study found that 65 percent (35.9 Mha) of downstream irrigated croplands were located in catchments with high levels of dependence on urban wastewater flows. These same catchments were home to 1.37 billion urban residents. Of these croplands, 29.3 Mha were located in countries with low levels of wastewater treatment and home to 885 million urban residents. These figures provide insight into the key role that water reuse plays in meeting the water and food needs of people around the world, and the need to invest in wastewater treatment to protect public health

States Taking Charge: Examining the Role of Race, Party Affliation, and Preemption in the Development of in-state tuition laws for undocumented immigrant students

Part I of this Article details both the legislative and legal history of undocumented immigrants’ access to education in the United States. Part II then describes the current U.S. state laws in effect regarding in-state tuition for undocumented immigrant students at state-funded colleges and universities. Part III further explores the development of laws and policies with a keen focus on potential correlations between (1) the racial composition of state legislatures and the passage of in-state tuition policies; (2) the race of governors and the passage of in-state tuition policies; (3) partisan composition of state legislatures and the passage of in-state tuition policies; and (4) party affiliation of governors and in-state tuition policies. Part IV describes the concept of preemption and discusses the extent to which preemption has impacted the state statutes identified in Part II of this Article. Finally, Part V discusses the practical and normative implications of this research

States Taking Charge: Examining the Role of Race, Party Affliation, and Preemption in the Development of in-state tuition laws for undocumented immigrant students

Part I of this Article details both the legislative and legal history of undocumented immigrants’ access to education in the United States. Part II then describes the current U.S. state laws in effect regarding in-state tuition for undocumented immigrant students at state-funded colleges and universities. Part III further explores the development of laws and policies with a keen focus on potential correlations between (1) the racial composition of state legislatures and the passage of in-state tuition policies; (2) the race of governors and the passage of in-state tuition policies; (3) partisan composition of state legislatures and the passage of in-state tuition policies; and (4) party affiliation of governors and in-state tuition policies. Part IV describes the concept of preemption and discusses the extent to which preemption has impacted the state statutes identified in Part II of this Article. Finally, Part V discusses the practical and normative implications of this research