The Cost-Effectiveness of Alternative Advance Mailings in a Telephone Survey

Advance letters are being used increasingly to combat the declinein response rates, but their effectiveness depends partly ontheir being read. In the face of the post-9/11 anthrax mailingscare, the Office for Survey Research (OSR) converted to usingadvance postcards rather than advance letters. Subsequently,the OSR conducted an experiment to test the effectiveness ofsending letters, postcards, or nothing to directory-listed numbersselected in a large random digit dial (RDD) telephone survey.In terms of response rates, the results clearly indicate thatsending advance letters is more effective than sending postcards,which, in turn, is more effective than sending nothing. A detailedcost-effectiveness evaluation indicates that sending lettersactually saves money, despite the increased costs associatedwith the mailings, compared to sending postcards; sending postcardsis also more cost-effective than not sending anything.     

Maximum-likelihood estimates and likelihood-ratio criteria for multivariate elliptically contoured distributions

For a class of multivariate elliptically contoured distributions the maximum-likelihood estimators of the mean vector and covariance matrix are found under certain conditions. Likelihood-ratio criteria are obtained for a class of null hypotheses. These have the same form as in the normal case.     

Court-ordered foster family care reform: a case study

The authors examine the implications of G. L. v. Zumwalt, a case that resulted in a far-reaching consent decree that mandates specific reforms in policy and practice to be implemented by a public social welfare agency in its delivery of services to foster children and their families.     

STRATEGY AND INTERVENTION VERSUS NONINTERVENTION: A MATTER OF THEORY?*

The question of whether or not intervention and strategy are necessary components of competent therapy is described and related to the metaphorical assumptions of underlying theory. Passive listening and expert interpretations are consequences of psychodynamic theory. Active manipulation of social structure and strategic intervention into feedback are described as consequences of the mechanical assumptions of structural and cybernetic theory. Conversational participation and non intervention are described as necessary consequences of hermeneutic and linguistic approaches to therapy. It is concluded that different theoretical assumptions yield different conclusions regarding the nature of therapy and human problems. From this perspective the question of Intervention Versus Non-Intervention is more a matter of the theory held than a question to be answered in terms of the “right” or “adequate” thing to do or not do.     

Quality care for ill children: AIDS-specialized foster family homes

Children with AIDS and related complexes present a new and serious challenge to the child welfare field's foster care system. At this stage of the world's knowledge of AIDS and treatment capacity for its victims, the children are stigmatized as plague bearers, their viability is unknown, and few, if any, will ever have a home to return to. This article describes a special foster care demonstration in behalf of AIDS infants.     

Small sample properties of the logit maximum likelihood estimator:a simulation study

This paper explores the effect of sample size, scale of parameters and size of the choice set on the maximum likelihood estimator of the parameters of the multinomial logit model. Data were generated by simulations under a three-way factorial experimental design for logit models containing three, four and five explanatory variables. Simulation data were analyzed by analysis of covariance and a regression model of the performance measure, the log root mean-squared error (LRMSE), fitted against the three factors and their interactions. Several important conclusions emerged. First, the LRMSE improves, but at a decreasing rate, with increases in the model's degrees of freedom. Second, the number of choice alternatives in the decision makers' choice sets has a significant impact on the LRMSE; however, heterogeneity in the choice sets across the sample has little or no impact. Finally, the scale of parameters and all of its two-way interactions with the other two factors significantly affect the LRMSE. Using the regression results, a family of iso-LRMSE curves are derived in the space of model degrees of freedom and scale of parameters. Their implications for researchers in choosing sample size and scale of parameters is discussed.