An Evaluation of Instrumental Variable Strategies for Estimating the Effects of Catholic Schools

Several previous studies have relied on religious affiliation and the proximity to Catholic schools as exogenous sources of variation for identifying the effect of Catholic schooling on a wide variety of outcomes. Using three separate approaches, we examine the validity of these instrumental variables. We find that none of the candidate instruments is a useful source of identification of the Catholic school effect, at least in currently available data sets

Job Satisfaction Indicators and Their Correlates

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67361/2/10.1177_000276427501800303.pd

A New Full Orifice Disc Valve for Mitral Replacement

Because of dissatisfaction with certain features of the currently available ball and disc valve prostheses when implanted in patients with mitral stenosis and a small volume left ventricle, a full orifice discoid valve has been designed which avoids many of these shortcomings. The valve has been tested mechanically in a pulse duplicator and compared lo existing prostheses. High speed cine studies were used to evaluate turbulence. Implantation was carried out in animals. Evaluation by these various methods indicates that the valve is satisfactory for human implantation and may have significant advantages over other artificial valves when used in patients with mitral stenosis and small left ventricles

Evaluation of digital correction techniques for ERTS images

There are no author-identified significant results in this report

Fine-Structure Map of the Histidine Transport Genes in \u3cem\u3eSalmonella typhimurium\u3c/em\u3e

Afine-structure genetic map of the histidine transport region of the Salmonella typhimurium chromosome was constructed. Twenty-five deletion mutants were isolated and used for dividing the hisJ and hisP genes into 8 and 13 regions respectively. A total of 308 mutations, spontaneous and mutagen induced, have been placed in these regions by deletion mapping. The histidine transport operon is presumed to be constituted of genes dhuA, hisJ, and hisP, and the regulation of the hosP and hisJ genes by dhuA is discussed. The orientation of this operon relative to purF has been established by three-point crosses as being: purF duhA hisJ hisP

Issues of alcohol misuse among older people : attitudes and experiences of social work practitioners

This small-scale qualitative research focused on the experiences of social workers vis--vis older people who misuse alcohol. Based in an Older People's Team in the west of Scotland, the study explored service provision for alcohol misuse and examined whether practitioners felt the existing services provided by the Substance Misuse Team were effective in meeting the needs of older people with an alcohol problem. Using semi-structured interviews, data were collected from 18 participants, the majority (14) of whom were female and whose ages ranged from 31 to 54 years. Several key themes emerged including the extent of alcohol problems among older people and the complex reasons that cause older people to misuse alcohol. These reasons commonly related to the increasing challenges of old age. The data also demonstrated that current services are not meeting the needs of older people. Practitioners identified a need for an 'age-specific' approach to target more effectively the complex needs of older people. Recommendations from practitioners included ways to develop new and more effective services, including a more age-specific service, such as providing longer term support in older people's own homes, using a specialised support worker, and increasing staff training on alcohol use among older people

Case Selection: A Case for a New Approach

While conducting empirical research regarding the relationship between case characteristics and student performance, the authors were surprised to find a lack of conceptual and empirical research regarding instructor case selection. This conceptual paper explores the case selection process and introduces case selection as an under-investigated component of the case teaching method in management education. Case selection is important because it is a critical component of the case teaching method. There has been no empirical testing of the effectiveness of case selection technique. The authors identify and propose case selection criteria for instructors of management education