Death and Development

Analyzing a variety of cross-national and sub-national data, we argue that high adult mortality reduces economic growth by shortening time horizons. Higher adult mortality is associated with increased levels of risky behavior, higher fertility, and lower investment in physical and human capital. Furthermore, the feedback effect from economic prosperity to better health care implies that mortality could be the source of a poverty trap. In our regressions, adult mortality explains almost all of Africa's growth tragedy. Our analysis also underscores grim forecasts of the long-run economic costs of the ongoing AIDS epidemic.

Nitrogen-rich transition metal nitrides

The solid state chemistry leading to the synthesis and characterization of metal nitrides with N:M ratios >1 is summarized. Studies of these compounds represent an emerging area of research. Most transition metal nitrides have much lower nitrogen contents, and they often form with non- or sub-stoichiometric compositions. These materials are typically metallic with often superconducting properties, and they provide highly refractory, high hardness materials with many technological applications. The higher metal nitrides should achieve formal oxidation states (OS) attaining those found among corresponding oxides, and they are expected to have useful semiconducting properties. Only a very few examples of such high OS nitrogen-rich compounds are known at present. The main group elements typically form covalently bonded nitride ceramics such as Si3N4, Ge3N4 and Sn3N4, and the early transition metals Zr and Hf produce Zr3N4 and Hf3N4. However, the only main example of a highly nitrided transition metal compound known to date is Ta3N5 that has a formal oxidation state +5 and is a semiconductor with visible light absorption leading to applications as a pigment and in photocatalysis. New synthesis routes are being explored to study the possible formation of other N-rich materials that are predicted to exist by ab initio calculations. There is a useful interplay between theoretical predictions and experimental synthesis studies at ambient and high pressure conditions, as we explore and establish the existence and structure–property relations of these new nitride compounds and polymorphs. Here we review the state of current investigations and indicate possible new directions for further work

Synergies in Wireless Telephony: Evidence from the Broadband PCS Auctions

We examine bid data from the first two broadband PCS spectrum auctions for evidence of value synergies. First, we estimate a benchmark regression for the determinants of final auction prices. Then, we include variables reflecting the extent to which bidders ultimately won or already owned the adjacent wireless properties. Consistent with geographic synergies in an ascending-bid auction, prices were higher when the highest-losing bidder had adjacent licenses. The footprints of winning bidders suggest that they were often successful in realizing these synergies.Auctions; Multi-Object Auctions; Spectrum Auctions

The Impact of Oil and Natural Gas Facilities on Rural Residential Property

This paper examines the impact of oil and gas facilities on rural residential property values using data from central Alberta, Canada. The influences are evaluated using two groups of variables characterizing hazard effects and amenity effects. A spatial error model was employed to capture the spatial dependence between neighbouring properties. The results show that property values are negatively correlated with the number of sour gas wells and flaring oil batteries within 4km of the property. Indices reflecting potential health hazards associated with rates of H2 S release (based on information from Emergency Response Plans and Zones) also have a significant negative association with property prices. The findings suggest that oil and sour gas facilities located within 4 km of rural residential properties significantly affect their sale price.sour gas; hedonic prices; property value impacts

Systematic review of interventions for the secondary prevention and treatment of emotional abuse of children by primary carers

Background Emotional abuse (or psychological maltreatment, as it is more commonly called in the US) is an inadequately researched and poorly understood concept, despite increasing awareness about the harm it can cause to children‟s lives. Although it unifies and underpins all types of maltreatment it also occurs alone and when it does, tends to elude detection and intervention. There have to date been no systematic reviews of the literature on the secondary prevention and treatment involving the parents or primary carers of emotionally abused children. Objective The objective of the review was to identify studies that evaluate the effectiveness of interventions in the secondary prevention and treatment of child emotional abuse involving the parents or primary carers of children aged 0 – 19 years. Methods Studies were included if they involved any intervention which was directed at emotionally abusive parenting and that measured change in (i) emotional unavailability (ii) negative attributions (i.e. that involve the parent attributing negative intentions, beliefs or attitudes toward the child); (iii) developmentally inappropriate interactions; (iv) lack of recognition of children‟s boundaries; (v) inconsistency of parenting role; (vi) missocialisation or consistent failure to promote the child‟s social adaptation. The primary outcomes evaluated involved proxy measures of a range of parent, family and child outcomes including parental psychopathology, parenting attitudes and practices, family functioning and/or child behaviour and the child‟s development and adaptation. . A broad search strategy was developed in order to identify as many relevant studies as possible. An electronic search of a wide range of databases was carried about. No study type was excluded. The search was augmented by direct contact with academics and practitioners known in this field. The search included studies written in English, Spanish, French and German. Studies were included if the intervention was described, and the impact on at least one indicator of emotional abuse was assessed. Included studies were critically appraised by two reviewers using standard criteria. Data were extracted using a standard proforma, and a qualitative synthesis of results was carried out. Results The initial search yielded 4248 publications of potential interest. Of these, 175 were obtained for possible inclusion or as background material. A total of 21 studies of 18 interventions, met all the inclusion criteria. A further 43 studies were relevant, but did not meet all of the inclusion criteria. Studies were organised according to the type of emotional abuse targeted: emotionally abusive parenting; parents of infants with faltering growth; missocialisation: parenting interventions with substance-abusing mothers. Twelve included studies had quantitative designs. Of these, 6 comprised randomised controlled trials; 1 comprised a follow-up of a randomised controlled trial; 2 were controlled studies; and 3 had one-group pre- and post-designs. The remaining 9 were case studies. Included studies involved a wide range of interventions. The 8 studies for parents which address emotionally abusive parenting (rejection, misattribution, parent-child role reversal and anger management) involved evaluations of cognitive-behavioural training (CBT), behavioural training and parent-infant psychotherapy. Two further case studies involved cognitive-behavioural training, mentalisation and family-based therapy. The 9 interventions with parents of infants with faltering growth evaluated CBT, behavioural training, parent infant psychotherapy and interaction guidance; lay home visitors, and a range of therapeutic options based on the diagnostic condition of the parents. The 3 studies of interventions for substance abusing mothers evaluated a relational psychotherapy group for mothers, and a residential treatment for substance abuse with a parenting component. The sample sizes for quantitative studies were small and ranged from 17 to 98 participants. Ten interventions involved mothers alone, while a further 11 included fathers, either at the outset or at a later stage, and in 3 cases extended family members. Interventions for emotionally abusing parents The findings from the 8 included studies evaluating CBT, psychotherapy, and behavioural approaches suggest that group-based CBT may be an effective means of intervening with this group of parents, although it cannot currently be recommended with parents experiencing symptoms of severe psychopathology. While one comparative study showed a psychotherapeutic intervention to be more effective than a CBT focused intervention, the outcomes measured in this study (i.e. parent and child representations) favoured the former. Behavioural case work involving the use of problem-solving techniques may also have a role to play with some parents, although further research is still needed. Interventions to enhance parental sensitivity The findings from a systematic review of 81 interventions that aimed at enhancing parental sensitivity and / or infant attachment found strong evidence that short term (less than 16 sessions) interventions, with a behavioural focus and aimed exclusively at enhancing maternal sensitivity were also most effective in enhancing infant attachment security. This supports the notion of a causal role of sensitivity in shaping attachment. Interventions that included fathers as well as mothers showed higher effect sizes but results are tentative since they are based on a small number of small scale trials. Parental behaviours associated with faltering growth Nine studies evaluated a range of interventions with parents of babies with faltering growth including interaction guidance, home visiting; parent-child psychotherapy, behavioural casework and multi-component interventions. The findings show that interaction guidance and parent-infant psychotherapy may be potentially effective means of working with this group of clients along with behavioural casework, but that further research is needed before these can be recommended. Missocialisation: Parenting interventions for substance-abusing parents 5 studies (one of which was a 6-month follow-up) evaluated interventions for substance abusing mothers, including a relational psychotherapy group and a residential treatment for substance abusing adults with a parenting component. The findings show that initial gains made in the former were not sustained at 6-months and few benefits from residential intervention. Conclusions Emotional abuse is a complex issue resulting in part from learned behaviours, psychopathology and/or unmet emotional needs in the parents, and often compounded by factors in the families‟ immediate and wider social environment. As such, a „one-approach-fits-all‟ is unlikely to lead to sustained change. The evidence base is weak, but suggests that some caregivers respond well to cognitive behavioural therapy. However, the characteristics that define these parents are not clear. There is currently no evidence to support the use of this intervention alone in the treatment of severely emotionally abusive parents. Some of the evidence suggests that a certain form of emotional abuse (for example, highly negative parent affect, which may be expressed as frightened and frightening behaviours in the parent) stemming from unresolved trauma and loss, is less amenable to CBT. There is some evidence that interaction guidance and psychotherapeutic approaches can generate change in parents with more severe psychopathology. Further research is urgently needed to evaluate the benefits of both psychotherapeutic and cognitive behavioural interventions, including those which take the form of family therapy, with parents at the more severe end of the spectrum, with fathers, and with older children. There is also a need to gain further understanding about which forms of emotional abuse respond best to different treatments

Package Bidding for Spectrum Licenses

The FCC was an innovator in adopting the rules of the simultaneous ascending-price auction for its sales of spectrum licenses. While these rules have performed well in the auctions conducted so far (and would perform even better with the design improvements suggested in our first report), there are two inherent limitations in any design that seeks to assign and price the licenses individually. First, such designs create strategic incentives for bidders interested in multiple licenses that are substitutes to reduce their demands for some of the licenses in order to reduce the final prices of the others; this is the demand reduction problem. Second, even if bidders behave non-strategically, there is a fundamental problem with the basic concept of individual-license pricing when licenses are complementary. In simultaneous ascending-price auctions, from a bidder's perspective this is the exposure problem. A bidder who is unsuccessful in bidding for a large package of licenses may be left with a partial package whose total price cannot be justified in the absence of those complementary licenses it failed to win. This problem is present in any auction mechanism that sells licenses individually, with no opportunity to bid on packages. In this report our task is confined to analyses of the merits of package bidding and the practical problems of implementation. In our next report, we will outline proposals for the details of the procedural rules and other aspects of implementing a practical design, as well as the software development that would be necessary.Auctions; Spectrum Auctions; Multiple-Round Auctions; Efficiency

Auction Design Enhancements for Non-Combinatorial Auctions

We evaluate a number of possible enhancements to the FCC auctions. We consider only changes to the current auction rules that stay within the basic format of the simultaneous multiple round auction for individual licenses. This report summarizes and extends our e-mail exchanges with FCC staff on this topic. A subsequent report will cover auctions with combination bids. Overall, the FCC spectrum auctions have been an enormous success. However, there are two design goals in the auction where important improvement can be achieved within the basic rules structure. These are restricting collusion among bidders and reducing the time taken to complete the auction. This report focuses on enhancements that help to achieve these two goals. Some of the suggested changes also streamline the auction process so large auctions can be conducted more quickly without sacrificing efficiency.Auctions; Spectrum Auctions; Multiple-Round Auctions; Efficiency