Modelling heterogeneity of survival in band-recovery data using mixtures

Finite mixture methods are applied to bird band-recovery studies to allow for heterogeneity of survival. Birds are assumed to belong to one of finitely many groups, each of which has its own survival rate (or set of survival rates varying by time and/or age). The group to which a specific animal belongs is not known, so its survival probability is a random variable from a finite mixture. Heterogeneity is thus modelled as a latent effect. This gives a wide selection of likelihood-based models, which may be compared using likelihood ratio tests. These models are discussed with reference to real and simulated data, and compared with previous models.     

Unions and Employment Growth: Evidence from State Economic Recoveries

We test the hypothesis that in an economic recovery, unionization negatively affects job creation. We examine state-level job growth following two recent recessions, those with troughs in November 1982 and March 1991. In the five years following the troughs, we assess whether variations across states in union membership and right-to-work laws affect the rate of job growth. We find evidence that links union influence to slower job growth during an economic recovery, a finding consistent with previous studies reporting that unions negatively affect average employment and employment growth.

The Role of Alumni in Baccalaureate Social Work Education

This article discusses the results of a 1993 national survey of undergraduate social work program directors on the role of alumni in their programs. Respondents indicated that they involved alumni, primarily as field supervisors, campus speakers, and members of curriculum advisory boards. Only 20% of respondents reported social work-specific alumni organizations; most often these were institutions with public affiliations, joint MSW-BSW program structures, and enrollments exceeding 10,000. Having a social work alumni organization was associated with higher rates of alumni participation in field supervision, mentoring, linkage and networking activities, recruitment, and curriculum advisory boards. A profile of the typical social work alumni organization is presented, and the need for more programs to initiate such organizations is examined.     

Health Care and Female Survivors of Childhood Sexual Abuse: Health Professionals' Perspectives

The present study explored health professionals' experiences with adult survivors of child sexual abuse in New Zealand. Face-to-face, semistructured interviews of up to an hour took place with 13 health professionals. The participants were asked about training, screening practices, their response to disclosures, and advice to other health professionals. A model—transition to ethical practice—emerged from the data, where delivering more sensitive health care to child sexual abuse survivors sits on a continuum from lack of awareness of child sexual abuse to delivery of care where all patients are comfortable. We recommend making sensitive care for all as the standard care of practice and providing training for health professionals on how to deal with disclosures.