Abrupt Losses Research Articles

Disentangling the Influential Factors Driving NPP Decrease in Shandong Province: An Analysis from Time Series Evaluation Using MODIS and CASA Model

Net Primary Productivity (NPP) is a critical metric for assessing terrestrial carbon sequestration and ecosystem health. While advancements in NPP modeling have enabled estimation at various scales, hidden anomalies within NPP time series necessitate further investigation to understand the driving forces. This study focuses on Shandong Province, China, generating a high-resolution (250 m) monthly NPP product for 2000–2019 using the Carnegie–Ames–Stanford Approach (CASA) model, integrated with satellite remote sensing and ground observations. We employed the Seasonal Mann–Kendall (SMK) Test and the Breaks For Additive Season and Trend (BFAST) algorithm to differentiate between gradual declines and abrupt losses, respectively. Beyond analyzing land use and land cover (LULC) transitions, we utilized Random Forest models to elucidate the influence of environmental factors on NPP changes. The findings revealed a significant overall increase in annual NPP across the study area, with a moderate average of 503.45 gC/(m2·a) during 2000–2019. Although 69.67% of the total area displayed a substantial monotonic increase, 3.89% of the area experienced abrupt NPP losses, and 8.43% exhibited gradual declines. Our analysis identified LULC transitions, primarily driven by urban expansion, as being responsible for 55% of the abrupt loss areas and 33% of the gradual decline areas. Random Forest models effectively explained the remaining areas, revealing that the magnitude of abrupt losses and the intensity of gradual declines were driven by a complex interplay of factors. These factors varied across vegetation types and change types, with explanatory variables related to vegetation status and climatic factors—particularly precipitation—having the most prominent influence on NPP changes. The study suggests that intensified land use and extreme climatic events have led to NPP diminishment in Shandong Province. Nevertheless, the prominent positive vegetation growth trends observed in some areas highlight the potential for NPP enhancement and carbon sequestration through targeted management strategies.

Parental Experiences of Grief after Pregnancy Loss: systematic review of qualitative studies

IntroductionGestational Loss represents a set of abrupt and unexpected losses throughout pregnancy or after childbirth. Every year, around two million babies die after 28 weeks of gestation, with between 14% and 20% of all pregnancies ending in loss. In most situations, pregnancy loss occurs in a pregnancy without signs of risk or irregularities, something that increases the shock and suffering felt by parents.ObjectivesThe present study aims to understand the relationship between pregnancy loss and parents’ grief experiences after spontaneous abortion, stillbirth or neonatal death with qualitative evidence.MethodsThis review followed the principles of PRISMA, and the search was carried out in the Web of Science and Scopus databases, aiming to find relevant articles about parental grief experiences resulting from pregnancy loss, published between 2012 and 2022. After research and analysis Of the studies, 15 qualitative studies were included.ResultsThe pain and sadness when experiencing the loss of a child was a common point in all the studies found. In this review, the majority of men revealed a duality in wanting to protect, physically and emotionally, their partner, while experiencing their own grief, something that led to the internalization of their emotions and the minimization of their pain. Grieving fathers and mothers report experiencing this process alone, describing the difficulty in expressing what they feel due to the lack of recognition of the loss. It was found that confrontation with other pregnant women leads bereaved parents to reveal jealousy and shame, as well as feelings of guilt. The farewell rituals, the process of writing and talking about their experience helped the women to not feel so alone and to find a purpose: to transform their pain and help other grieving mothers. Fathers and mothers who experienced pregnancy loss stated that the death of their child provided change and growth.ConclusionsAfter Pregnancy Loss, adapting to the new reality is extremely painful, despite the work of mourning being necessary and crucial. This process is a search to integrate and accept the reality of the loss of the baby in a way that has meaning for the mother and father, it is the adaptation to a world without the lost child and to a relationship that had been built during the gestation period, which was violently broken. It is necessary for health professionals to be present and available to address these parents’ fears, provide advice and support.Disclosure of InterestNone Declared

Unidirectional and combined transitional flow bedforms: Controls on process and distribution in submarine slope settings

ABSTRACTMixed grain‐size bedforms comprise alternating sand‐rich and poorly sorted mud‐rich laminae and bands. These bedforms have been identified in distal submarine settings formed underneath unidirectional flows. This study documents mixed grain‐size bedforms in a proximal submarine slope setting formed beneath both unidirectional and combined flows. Core and outcrop data with well‐constrained palaeogeographical context are used to describe two types of mixed grain‐size bedform. Type A bedforms comprise mud‐rich current ripples and low‐amplitude bed‐waves with alternating concave and planar sandstone–mudstone foresets that pass into mud‐rich troughs, and aggradational sinusoidal laminasets. Type B bedforms consist of sandstone–mudstone laminasets that comprise rounded, biconvex ripples with sigmoidal‐shaped foresets and swale and hummock‐like laminasets and banded sets. These bedforms occur in channel‐margin, internal‐levée and external‐levée, intraslope and disconnected lobe environments, and represent 27 to 63% by stratigraphic thickness of the studied successions. They are interpreted as deposits of clay‐rich transitional flows, whose depositional style is governed by the balance of cohesive and turbulent forces, and the rate of flow deceleration. Type B bedforms are further interpreted as combined transitional flow deposits, resulting from flow deflection and ponding processes by seabed topography. Upward and lateral transitions between different bedforms create distinct bedform sequences, demonstrating progressive spatio‐temporal transformations in flow properties and their topographic interactions. By using a well‐constrained palaeogeographical setting, mixed grain‐size bedforms are shown to be situated close to sites of erosion into muddy substrates, abrupt losses in confinement, and/or changes in slope gradient. These bedforms demonstrate that flow transformation and transitional flow behaviour are not restricted to distal submarine settings. Furthermore, mixed grain‐size bedforms are not a diagnostic criterion for bottom currents, because such flows cannot account for the high mud content in laminasets, or the interlamination of sand and mud.

Timing matters: Sampling frequency for early-warning indicators across food web components in a virtual lake

Shallow lakes are known for sudden shifts between a desired clear and an undesired turbid state despite only incremental changes in the underlying drivers. Such sudden shifts are a major challenge for lake managers who can be confronted with abrupt losses of desired ecosystem services without easily observable warning signals. Predictive tools for the loss of ecosystem resilience are vital to respond with timely mitigation measures and avert a shift to the undesired state. Early-warning indicators (EWIs) have faithfully preceded critical transitions in minimal models but have proven more elusive in real-world data, suggesting a mismatch between measurement strategy and the detectability of EWIs. Here, we capitalize on data simulated using the aquatic ecosystem model PCLake+ which represents real systems more closely than reductionistic models and which allows the generation of critical transitions in response to gradual changes in phosphorus load. We tested the effect of different sampling intervals (daily to yearly) on the detection of three often-used EWIs across a range of food web and nutrient-related variables. Moreover, we included one integrated sampling interval (yearly average of daily measurements) to represent time-integrated measurements. EWIs generally performed better at shorter intervals (daily, weekly) but integrated measurements over the year also proved suitable to detect oncoming state shifts. We propose that lake managers should aim for high-frequency measurements of variables that can be easily and cheaply measured (e.g. oxygen, Secchi) or, alternatively, focus on integrated approaches using passive samplers or sedimented material.

Relative efficiency of three mechanisms of vector field growth in a random media.

We consider a model of a random media with fixed and finite memory time with abrupt losses of memory (renovation model). Within the memory intervals we can observe either amplification or oscillation of the vector field in a given particle. The cumulative effect of amplifications in many subsequent intervals leads to amplification of the mean field and mean energy. Similarly, the cumulative effect of intermittent amplifications or oscillations also leads to amplification of the mean field and mean energy, however, at a lower rate. Finally, the random oscillations alone can resonate and yield the growth of the mean field and energy. These are the three mechanisms that we investigate and compute analytically and numerically the growth rates based on the Jacobi equationwith a random curvature parameter.

HOW DO INTERPERSONAL FACTORS AFFECT GRIEF AMONG BLACK MIDDLE- TO OLDER-AGED ADULTS?

Abstract This talk will explore: 1) the conceptual importance of select interpersonal factors inherent to Black culture and bereavement, and 2) the impact of these factors on grief in a Black bereaved sample. 103 Black adults aged 45+ were administered items assessing cultural (communalism, experienced racial violence) and bereavement-specific (expectancy and suddenness of loss, closeness to the deceased, anger) factors. Using linear regressions, closeness (p<.001), suddenness (p=.020), anger (p<.001), and communalism (p<.001) predicted reported levels of grief. This study identifies factors which substantially dictate the experienced levels of grief of bereaved Black adults in the latter half of life. With cultural factors notably impacting the Black bereavement experience, individuals seeking to work with this population must adopt strategies to keep bereaved Black adults connected to their communities throughout their loss. Resources to support Black adults in maintaining healthy continuing bonds with the deceased through abrupt or unsettling losses also appear paramount.

A Community-First Approach to Managing Pandemic Stimulus Funds.

A Community-First Approach to Managing Pandemic Stimulus Funds.

Habitat loss predicts the functional extinction of fish from Amazonian streams during the Anthropocene

The evaluation of extinction risk has typically focused on individual species, although a shift to a focus on ecosystem functioning would appear to be an urgent priority for conservation planning, especially considering that a sixth mass extinction event has already begun. In the present study, we investigated how fish extinction driven by habitat loss may modify the functioning of freshwater Amazonian ecosystems. We sampled the fish and environmental conditions of 63 streams in the eastern Amazon and simulated extinction based on the vulnerability of the species to habitat loss, which is the principal threat to tropical biodiversity. The simulated extinction of vulnerable species led to a decrease in both the mean body size of the community and functional rarity and culminated in abrupt losses of ecosystem functions after 5% and 10% of extinction at local and regional scales. Our functional approach demonstrated the progressive loss of ecological functions in Amazon streams, which may collapse altogether following the extinction of functions related to protection against biological invasions, and associated alterations in nutrient cycling and water quality. We provide robust predictions on the modification of the ecosystem following the extinction of fish species, which is a major step toward the development of effective conservation measures that ensure the avoidance of the predicted processes, and help to prevent the loss of biodiversity and the potentially irreversible modifications to ecosystem functioning.

Decadal increase in the ecological status of a North-Atlantic intertidal seagrass meadow observed with multi-mission satellite time-series

Seagrass meadows are monitored in the frame of several environmental programs worldwide, including the Water Framework Directive (WFD), to evaluate the ecological status of European coastal and transitional water bodies. The large size, spatial complexity, and interannual variability of seagrass ecosystems significantly challenge field monitoring. In this study, a multi-mission satellite time-series was used to estimate long-term changes in seagrass status in a macrotidal system dominated by Zostera noltei, at Bourgneuf Bay (French Atlantic coast). Metrics of seagrass extent and density were obtained from Earth Observation (EO) using validated and inter-calibrated Landsat, SPOT and Sentinel2 data from 1985 to 2020. The information provided by satellite data made it possible to compute and compare several seagrass indicators currently in use in several European countries (France, Portugal and UK) within the WFD. Both the seagrass extent and meadow-averaged density displayed increasing trends since 1985. A time-series of merged observations from various satellites revealed a high degree of interannual variability in seagrass extent, with abrupt losses (up to 50% within one year) alternating with periods of slow recovery (typically 4–6 years). The seagrass meadow which was in a moderate status (sensu the WFD) in the 1980s, achieved an overall recurrent good or high status since the mid-1990s. Altogether, the methods and results presented here demonstrated that EO is a reliable source of information for mapping and assessing the status of intertidal seagrass, complementing in situ measurements by providing long-term, spatial view and standardized observation framework. We recommend the systematic use of EO time-series in complement to traditional field measurements in seagrass monitoring programs such as the WFD.

The Impacts of Covid-19 on Nature-based Tourism in Botswana: Implications for Community Development

COVID-19 has had significant impacts on industries and individuals globally. Due to restrictions put in place to reduce the spread of the disease, it has affected the travel and tourism industry. Using the concepts of ecotourism and sustainable tourism, a systematic qualitative document analysis of available literature was carried out to determine the impacts of the COVID-19 pandemic on nature-based tourism and its implications on community development, using Botswana as a case study. Results indicate that due to the unsustainable and predominant dependence on the international market, the tourism sector in Botswana has come to a standstill. Furthermore, the promotion of domestic tourism to nature-based attractions may lead to conservation issues. COVID-19 has also had an impact on community development through abrupt losses of employment and income. However, several positive environmental impacts have also been experienced. This article calls for a transformation of the tourism sector to make it more resilient. As a response measure, it is necessary to assess whether there is a need to call for a change in policy from high-value low-volume to low-cost high-volume, which may have negative impacts on conservation. However, as an adaptive response, we assert the need to diversify tourism products to consider the needs of both domestic and regional markets so that the focus is not just on nature-based tourism and international clientele.

Drivers of Natural Variation in Water-Use Efficiency Under Fluctuating Light Are Promising Targets for Improvement in Sorghum.

Improving leaf intrinsic water-use efficiency (iWUE), the ratio of photosynthetic CO2 assimilation to stomatal conductance, could decrease crop freshwater consumption. iWUE has primarily been studied under steady-state light, but light in crop stands rapidly fluctuates. Leaf responses to these fluctuations substantially affect overall plant performance. Notably, photosynthesis responds faster than stomata to decreases in light intensity: this desynchronization results in substantial loss of iWUE. Traits that could improve iWUE under fluctuating light, such as faster stomatal movement to better synchronize stomata with photosynthesis, show significant natural diversity in C3 species. However, C4 crops have been less closely investigated. Additionally, while modification of photosynthetic or stomatal traits independent of one another will theoretically have a proportionate effect on iWUE, in reality these traits are inter-dependent. It is unclear how interactions between photosynthesis and stomata affect natural diversity in iWUE, and whether some traits are more tractable drivers to improve iWUE. Here, measurements of photosynthesis, stomatal conductance and iWUE under steady-state and fluctuating light, along with stomatal patterning, were obtained in 18 field-grown accessions of the C4 crop sorghum. These traits showed significant natural diversity but were highly correlated, with important implications for improvement of iWUE. Some features, such as gradual responses of photosynthesis to decreases in light, appeared promising for improvement of iWUE. Other traits showed tradeoffs that negated benefits to iWUE, e.g., accessions with faster stomatal responses to decreases in light, expected to benefit iWUE, also displayed more abrupt losses in photosynthesis, resulting in overall lower iWUE. Genetic engineering might be needed to break these natural tradeoffs and achieve optimal trait combinations, e.g., leaves with fewer, smaller stomata, more sensitive to changes in photosynthesis. Traits describing iWUE at steady-state, and the change in iWUE following decreases in light, were important contributors to overall iWUE under fluctuating light.

Pre-processing, group accretion, and the orbital trajectories of associated subhaloes

ABSTRACT We use a high-resolution cosmological dark matter-only simulation to study the orbital trajectories of haloes and subhaloes in the environs of isolated hosts. We carefully tally all apsis points and use them to distinguish haloes that are infalling for the first time from those that occupy more evolved orbits. We find that roughly 21 per cent of resolved subhaloes within a host’s virial radius are currently on first infall, and have not yet reached their first orbital pericentre; roughly 44 per cent are still approaching their first apocentre after infall. For the range of host masses studied, roughly half of all accreted systems were pre-processed prior to infall, and about 20 per cent were accreted in groups. We confirm that the entire population of accreted subhaloes – often referred to as ‘associated’ subhaloes – extends far beyond the virial radii of their hosts, with roughly half currently residing at distances that exceed ≈1.2 × r200. Many of these backsplash haloes have gained orbital energy since infall, and occupy extreme orbits that carry them well past their initial turnaround radii. Such extreme orbits are created during the initial accretion and dissolution of loosely bound groups, but also through penetrating encounters between subhaloes on subsequent orbits. The same processes may also give rise to unexpectedly abrupt losses of orbital energy. These effects combine, giving rise to a large variation in the ratio of sequent apocentres for accreted systems. We find that, within two virial radii from host centres, the concentrations of first-infall haloes are remarkably similar to those of isolated field haloes, whereas backsplash haloes, as well as systems that were pre-processed, are considerably more concentrated.

More than one way to kill a spruce forest: The role of fire and climate in the late‐glacial termination of spruce woodlands across the southern Great Lakes

Abstract In the southern Great Lakes Region, North America, between 19,000 and 8,000 years ago, temperatures rose by 2.5–6.5°C and spruce Picea forests/woodlands were replaced by mixed‐deciduous or pine Pinus forests. The demise of Picea forests/woodlands during the last deglaciation offers a model system for studying how changing climate and disturbance regimes interact to trigger declines of dominant species and vegetation‐type conversions. The role of rising temperatures in driving the regional demise of Picea forests/woodlands is widely accepted, but the role of fire is poorly understood. We studied the effect of changing fire activity on Picea declines and rates of vegetation composition change using fossil pollen and macroscopic charcoal from five high‐resolution lake sediment records. The decline of Picea forests/woodlands followed two distinct patterns. At two sites (Stotzel‐Leis and Silver Lake), fire activity reached maximum levels during the declines and both charcoal accumulation rates and fire frequency were significantly and positively associated with vegetation composition change rates. At these sites, Picea declined to low levels by 14 kyr BP and was largely replaced by deciduous hardwood taxa like ash Fraxinus, hop‐hornbeam/hornbeam Ostrya/Carpinus and elm Ulmus. However, this ecosystem transition was reversible, as Picea re‐established at lower abundances during the Younger Dryas. At the other three sites, there was no statistical relationship between charcoal accumulation and vegetation composition change rates, though fire frequency was a significant predictor of rates of vegetation change at Appleman Lake and Triangle Lake Bog. At these sites, Picea declined gradually over several thousand years, was replaced by deciduous hardwoods and high levels of Pinus and did not re‐establish during the Younger Dryas. Synthesis. Fire does not appear to have been necessary for the climate‐driven loss of Picea woodlands during the last deglaciation, but increased fire frequency accelerated the decline of Picea in some areas by clearing the way for thermophilous deciduous hardwood taxa. Hence, warming and intensified fire regimes likely interacted in the past to cause abrupt losses of coniferous forests and could again in the coming decades.

Using Lime (Citrus × aurantiifolia), Orange (Citrus × sinensis), and Tangerine (Citrus reticulata) Waste as a Substrate for Generating Bioelectricity

This paper focuses on using lime, orange, and tangerine waste as fuel for the generation of bioelectricity. The tangerine microbial fuel cell evidenced a maximum voltage peak of 1.1 V on day 13, while displaying abrupt voltage losses on the following days and throughout the remaining period of substrate monitoring. On the other hand, orange-based fuel denotes lower current generation during these 28 days with values close to 1.6 mA and 0.25 mA on the first and last day, respectively. Still, orange generated 3.5 mA on the first day with values sharply declining in the following days until reaching 0.91 mA on the last day. In general, substrate volumes in the microbial fuel cells diminished over time, which is consistent with the voltage and current values reported. In addition, pH values increased from day 1 for all substrates, reaching acidic pH values on the last day of measurement due to the consumption of carbon sources. Tangerine reported the highest current density (CD) at 72 mW/cm2 and a maximum voltage of 1.06 volts, while orange generated a CD of 62.5 mW/cm2 and 0.94 volts.

Carbon benefits from Forest Transitions promoting biomass expansions and thickening.

The growth of the global terrestrial sink of carbon dioxide has puzzled scientists for decades. We propose that the role of land management practices—from intensive forestry to allowing passive afforestation of abandoned lands—have played a major role in the growth of the terrestrial carbon sink in the decades since the mid twentieth century. The Forest Transition, a historic transition from shrinking to expanding forests, and from sparser to denser forests, has seen an increase of biomass and carbon across large regions of the globe. We propose that the contribution of Forest Transitions to the terrestrial carbon sink has been underestimated. Because forest growth is slow and incremental, changes in the carbon density in forest biomass and soils often elude detection. Measurement technologies that rely on changes in two‐dimensional ground cover can miss changes in forest density. In contrast, changes from abrupt and total losses of biomass in land clearing, forest fires and clear cuts are easy to measure. Land management improves over time providing important present contributions and future potential to climate change mitigation. Appreciating the contributions of Forest Transitions to the sequestering of atmospheric carbon will enable its potential to aid in climate change mitigation.

Carbon release through abrupt permafrost thaw

The permafrost zone is expected to be a substantial carbon source to the atmosphere, yet large-scale models currently only simulate gradual changes in seasonally thawed soil. Abrupt thaw will probably occur in <20% of the permafrost zone but could affect half of permafrost carbon through collapsing ground, rapid erosion and landslides. Here, we synthesize the best available information and develop inventory models to simulate abrupt thaw impacts on permafrost carbon balance. Emissions across 2.5 million km2 of abrupt thaw could provide a similar climate feedback as gradual thaw emissions from the entire 18 million km2 permafrost region under the warming projection of Representative Concentration Pathway 8.5. While models forecast that gradual thaw may lead to net ecosystem carbon uptake under projections of Representative Concentration Pathway 4.5, abrupt thaw emissions are likely to offset this potential carbon sink. Active hillslope erosional features will occupy 3% of abrupt thaw terrain by 2300 but emit one-third of abrupt thaw carbon losses. Thaw lakes and wetlands are methane hot spots but their carbon release is partially offset by slowly regrowing vegetation. After considering abrupt thaw stabilization, lake drainage and soil carbon uptake by vegetation regrowth, we conclude that models considering only gradual permafrost thaw are substantially underestimating carbon emissions from thawing permafrost. Analyses of inventory models under two climate change projection scenarios suggest that carbon emissions from abrupt thaw of permafrost through ground collapse, erosion and landslides could contribute significantly to the overall permafrost carbon balance.

Inertia location and slow network modes determine disturbance propagation in large-scale power grids.

Conventional generators in power grids are steadily substituted with new renewable sources of electric power. The latter are connected to the grid via inverters and as such have little, if any rotational inertia. The resulting reduction of total inertia raises important issues of power grid stability, especially over short-time scales. With the motivation in mind to investigate how inertia reduction influences the transient dynamics following a fault in a large-scale electric power grid, we have constructed a model of the high voltage synchronous grid of continental Europe. To assess grid stability and resilience against disturbance, we numerically investigate frequency deviations as well as rates of change of frequency (RoCoF) following abrupt power losses. The magnitude of RoCoF’s and frequency deviations strongly depend on the fault location, and we find the largest effects for faults located on the support of the slowest mode—the Fiedler mode—of the network Laplacian matrix. This mode essentially vanishes over Belgium, Eastern France, Western Germany, northern Italy and Switzerland. Buses inside these regions are only weakly affected by faults occuring outside. Conversely, faults inside these regions have only a local effect and disturb only weakly outside buses. Following this observation, we reduce rotational inertia through three different procedures by either (i) reducing inertia on the Fiedler mode, (ii) reducing inertia homogeneously and (iii) reducing inertia outside the Fiedler mode. We find that procedure (iii) has little effect on disturbance propagation, while procedure (i) leads to the strongest increase of RoCoF and frequency deviations. This shows that, beyond absorbing frequency disturbances following nearby faults, inertia also mitigates frequency disturbances from distant power losses, provided both the fault and the inertia are located on the support of the slowest modes of the grid Laplacian. These results for our model of the European transmission grid are corroborated by numerical investigations on the ERCOT transmission grid.

Electrical Conductivity Behavior of Impregnated Lstm on Selectively Ni Removed Ni/YSZ Anode Substrate

Generally, nickel and yttria-stabilized zirconia (YSZ) have been preferred as anode materials for Solid Oxide Fuel Cells (SOFCs), because the Ni-YSZ cermet anode shows excellent performance while operating using hydrogen as a fuel. However, Ni-YSZ anodes are known to undergo degradation due to sulfur poisoning, carbon deposition, and mechanical instability when hydrocarbon-containing fuels have been used. One of the strategies to solve these problems is to modify the Ni-YSZ cermet by altering the nickel or YSZ, adding oxide material catalysts, and carrying out surface treatment. In this study, electrical conductivity behavior of impregnated La0.4Sr0.6Ti0.8Mn0.2O3±δ(LSTM) on selectively Ni removed Ni/8YSZ anode substrate have been investigated when hydrocarbon fuels are being used for SOFC applications. Abrupt weight losses were measured when reduced Ni/YSZ substrates were exposed to HNO3 at the initial stage reaching 5 minutes, indicating that within these first 5 minutes Ni metals on the surface of Ni/YSZ substrates were removed. After 5 minutes, Ni metals were removed with relatively lower removal rate (2.3 x10-3wt%/min) than first 5 minutes. At values below than 3 wt % of impregnated LSTM on Ni removed substrate, electrical conductivity increase and at values greater than 3 wt %, electrical conductivity decreases as it is related to the effective percolation of electrically conducting phase caused by LSTM present on Ni removed Ni/8YSZ anode substrate. Significantly, the electrical conductivity values with 3 wt % of impregnated LSTM on Ni removed substrate were 2.04 x103 and 1.88 x103 S/cm at 700 and 800oC under H2 condition.

Policies and Consequences: How America and Psychiatry Took the Detour to Erewhon.

In the mid-1960s, federal legislation provided psychiatry with funds for construction and initial staffing of local community mental health programs and funded university psychiatry departments to support research, innovations, and education in social-community psychiatry. Psychiatry gained resources for treating diseases and for addressing the disabilities that accompany mental illnesses. Abrupt losses of federal funding in the following decades, combined with restrictive insurance reimbursements and the expanding influence of the pharmaceutical industry, undermined psychiatry's abilities to address the needs of persons with severe mental illness. The author describes the perverse shift in social priorities that has occurred-with persons who have chronic mental illness housed in jails and heightened public perceptions that mass murders are the acts of persons with mental illness.

CDS Momentum: Slow Moving Credit Ratings and Cross-Market Spillovers

Using 5-year credit default swap (CDS) contracts on 1,247 U.S. firms from 2003-2011, we show a 3-month formation and 1-month holding period CDS momentum strategy yields 52 bps per month. By incorporating past CDS return signals, we further show traditional stock momentum strategies avoid abrupt losses during the crisis period and improve their performance by net 104 bps per month. Both within CDS market and across CDS-to-stock market momentum profits exist because CDS returns correctly anticipate future credit rating changes. Our results highlight the adverse effects of sluggish rating updates in creating information efficiency distortions and investment anomalies.