Analysis of responses of cold pressor tests on pilots and executives

Statistical analyses were performed to study the relationship between cold pressor test responses and certain medical attributes of a group of 81 pilots and a group of 466 executives. The important results of this study were as follows: There was a significant relationship between a subject's cold pressor test response and his profession (that is, pilot or executive). The executives' diastolic cold pressor test responses were significantly related to their medical conditions, and their families' medical conditions. Significant relationships were observed between executives' diastolic and systolic cold pressor test responses and their history of tranquilizer and cardiac drug use

The public sector in the Caribbean : issues and reform options

The public sector's performance in the Caribbean varies, in reducing poverty and in creating an enabling environment for growth. Barbados and the Bahamas have been the high performers, Guyana and the Dominican Republic have been sluggish, and the other Caribbean countries fall in between. In the Caribbean region, the public sector is now the predominant provider of tertiary education and health services (university education and hospital-based curative care), which mainly benefit the nonpoor. Attempts must be made to recover costs from high-income users and use that revenue to improve the quality and quantity (as appropriate) of basic services. Lessons from experience suggest that most Caribbean countries need to encourage the private sector to participate more in providing infrastructure and need to provide a better regulatory framework. The good news: this is already taking place in many countries.Health Monitoring&Evaluation,Public Health Promotion,Public Sector Economics&Finance,Decentralization,Environmental Economics&Policies,Public Sector Economics&Finance,Health Monitoring&Evaluation,Poverty Assessment,National Governance,Inequality

The public finance of infrastructure : issues and options

Using economic principles, the author provides criteria for financing infrastructure services where consumption-related user charges can be levied effectively. In light of the suggested criteria, the author examines the experience of developing countries in financing publicly provided infrastructure services in transport (road), water, telecommunications, and power. In developing countries, most infrastructure is provided by the public sector, although the private sector has become increasingly involved. Because it is difficult to raise funds through general taxes, self financing of these services remains a desirable second-best policy, one that almost all developing countries endorse. But experience suggests that, except in telecommunications, full cost recovery is more the exception than the rule. Financing remains inadequate. The political economy of tariff setting is an important element in low improperly designed user charges, infrequent adjustments for inflation, and poor enforcement. Such sectors as water, power, and transportation drains funds from the treasury, although their impact varies from sector to sector. When it is difficult to get budget transfers to materialize - especially during a fiscal crisis - there is often a reduction in nonwage operations and maintenance expenditures. As a result, services deteriorate. The private provision of infrastructure services is often suggested as an alternative. The private provision of services can certainly reduce the public sector's financing requirement. For infrastructure services for which technological advances have made competition possible, the market system could ensure efficient private provision of services, which could be a relief to the public sector. But for services that require a single provider to achieve economies of scale and similar benefits, the private provision of services will work only if an appropriate rate of return is assured - and only if user charges cover costs.Urban Economics,Public Sector Economics&Finance,Environmental Economics&Policies,Town Water Supply and Sanitation,Banks&Banking Reform

The implications of foreign aid fungibility for development assistance

A foreign aid or foreign lending policy that focuses exclusively on project financing may have unintended consequences, report the authors. New research shows that aid intended for crucial social and economic sectors often merely substitutes for spending that recipient governments would have undertaken anyway and the funds that are thereby freed up are spent for other purposes. If the aid funds something that would have been done anyway, traditional ways of evaluating the aid's effectiveness are not really accurate. Ifaid funds are fungible and the recipient's public spending program is unsatisfactory, project lending may not be cost-effective. If the recipient's public spending program is satisfactory, perhaps the donor should finance a portion of it instead of financing individual projects. One solution to the problem of fungibility, then, is that donors could tie assistance to an overall public spending program (in the recipient country) that provides adequate resources to crucial sectors. To make this kind of reform operational, the authors propose a new lending instrument: a public expenditure reform loan (PERL). A PERL would tie an institution's lending strategy to the recipient country's achievement of mutually agreed-upon development goals. Everyone agrees that better donor coordination is needed, but it has been difficult to achieve because some donors tend to prefer projects (usually with the national flag flying over them). By agreeing on a public expenditure program and financing a portion of it, the World Bank credibly ask other donors to do the same.Payment Systems&Infrastructure,Development Economics&Aid Effectiveness,Gender and Development,Decentralization,Economic Adjustment and Lending,Development Economics&Aid Effectiveness,Poverty Assessment,National Governance,Economic Adjustment and Lending,Public Sector Economics&Finance

An analysis of flight data from aircraft landings with and without the aid of a painted diamond on the same runway

The usefulness of a painted diamond on a runway as a visual aid to perform safe landings of aircraft was studied. Flight data on glideslope intercepts, flight path elevation angles, and touchdown distances were collected and analyzed. It is concluded that an appropriately painted diamond on a runway has the potential of providing glideslope information for the light weight class of general aviation aircraft. This conclusion holds irrespective of the differences in landing techniques used by the pilots

Beta distributions: A computer program for probabilities and fractile points

A beta distribution is specified by range parameters a b, and two shape parameters alpha and beta 0. The computer program presented calculates any desired probability and/or fractile point for specified values of a, b, alpha, and beta. This program additionally computes gamma function values for integer and noninteger arguments

State Transitions and Decoherence in the Avian Compass

The radical pair model has been successful in explaining behavioral characteristics of the geomagnetic compass believed to underlie the navigation capability of certain avian species. In this study, the spin dynamics of the radical pair model and decoherence therein are interpreted from a microscopic state transition point of view. This helps to elucidate the interplay between the hyperfine and Zeeman interactions that enables the avian compass, and the distinctive effects of nuclear and environmental decoherence on it. Using a quantum information theoretic quantifier of coherence, we find that nuclear decoherence induces new structure in the spin dynamics without materially affecting the compass action; environmental decoherence, on the other hand, completely disrupts it.Comment: 6 pages, 6 figure