Bootstrap and permutation rank tests for proportional hazards under right censoring

We address the testing problem of proportional hazards in the two-sample survival setting allowing right censoring, i.e., we check whether the famous Cox model is underlying. Although there are many test proposals for this problem, only a few papers suggest how to improve the performance for small sample sizes. In this paper, we do exactly this by carrying out our test as a permutation as well as a wild bootstrap test. The asymptotic properties of our test, namely asymptotic exactness under the null and consistency, can be transferred to both resampling versions. Various simulations for small sample sizes reveal an actual improvement of the empirical size and a reasonable power performance when using the resampling versions. Moreover, the resampling tests perform better than the existing tests of Gill and Schumacher and Grambsch and Therneau . The tests’ practical applicability is illustrated by discussing real data examples.

     

Family Loyalty and Adolescent Problem Behavior: The Validity of the Family Group Effect

Erratum . Journal of Law and Society Volume 32 Issue 3 The present study examined the relation between perceived justice and trust within family relationships and adolescent internalizing and externalizing problem behavior. Data were gathered from the father, the mother, and two of their adolescent children in 288 families. The social relations model was used to assess perceived justice and trust at the family level and the individual level. Adolescent internalizing and externalizing problem behavior turned out to be best predicted at the family level. Adolescents from families with less just or trustworthy climates showed more of these problem behaviors. Also associations between adolescent problem behavior and individual characteristics of the adolescents were found: adolescents who were generally viewed as less just/trustworthy were reported to have more problems. Our findings suggest that processes at different levels of family functioning (i.e., individual, whole‐family) should be taken into account when investigating associations between family characteristics and children's outcomes.     

Insuring equity in compensatory education student selection

Student selection strategies, because they determine who will receive special services, must be evaluated in terms of equity and validity. Yet those responsible for designing compensatory education student selection in the local school district lack methods that allow them to appraise their selection strategies in terms of equity. This paper describes a decision-theory-based procedure that, if followed, will increase the informational value of data often available from program evaluation data collection and district information systems. The information produced by the decision theory approach bears directly on the basic question of who gets served.     

Non-strict ordinal 2 × 2 games: A comprehensive computer-assisted analysis of the 726 possibilities

Game theory has provided many tools for the study of social conflict. The 2 × 2 game has been found to be a particularly useful model. This paper describes the enumeration and analysis of all 726 distinct 2 × 2 games. A computer is used to generate the complete set, and a wide variety of maximin, equilibrium and stability calculations is performed for each player for every outcome in every game. The resulting data set is of great value for both the modeling and analysis of social conflict.     

THE MULTIPLE BODIES OF THE MEDICAL RECORD:

This article argues that the medical record is an important focus for sociological research. In medical work, the modern patient's body that Foucault has so aptly described is produced through embodied, materially heterogeneous work, and the medical record plays a crucial role in this production. It does not simply represent this body's history and geography; it is a central element in the material rewriting of these. Simultaneously, the record fulfills a core role in the production of a body politic . As the record is involved in the performance of the patient's body, it is also involved in the performance of the clinic in which that body comes to life. Finally, we argue that different records and different practices of reading and writing are intertwined with the production of different patient's bodies, bodies politic, and bodies of knowledge. As organizational infrastructure, the medical record affords the interplay and coordination of divergent worlds. Seen as a site where multiple stories about patients and organizations are at stake, including the interoperability between these stories, the medical record becomes highly relevant both analytically and politically.     

Rethinking craft administration: Managerial position,work autonomy,and employment security in the building trades

The organization of work in the construction industry often has been presented as the exemplar of craft administration wherein managerial positions are of relatively low significance. Occupational control of employment and work structure in this context presumably is manifest through the craft union. On the other hand, research on other industries has shown the managerial position in the firm to be a source of extrinsic and intrinsic reward. This results from the manager's pivotal position in the bureaucratized labor process. This paper seeks to reconcile these perspectives. Data from a survey of 246 unionized construction workers and 14 local union officers from nine building trades are used to assess the impact of the managerial position and union involvement on work autonomy (self-direction and freedom from supervision) and employment security (unemployment and trade agreement infringements). In general, the results indicate that managerial affiliations to employers' firms are associated with greater autonomy and more employment security. Union involvement has contradictory consequences for individual tradespeople.     

A NOTE ON DECISION-MAKING CRITERIA FOR ALGORITHM SELECTION: REDUCING GOAL PROGRAMMING COMPUTATIONAL EFFORT

Most linear goal programming (LPG) algorithms are based on a simplex-type solution method that begins with an initial simplex tableau with solution-set variables (basic variables) consisting of all-negative deviational variables or all-positive deviational variables. This note (1) demonstrates how computational solution effort can be reduced by selecting the appropriate all-negative or all-positive deviational variable algorithm and (2) describes a procedure that can be used to aid decision makers in selecting the appropriate algorithm for all types of applied goal programming (GP) models. Results of this study reveal the procedure as accurate and providing computational time savings when applied to a large sample of GP problems.     

Evaluation of Scenarios for Reducing Human Salmonellosis Through Household Consumption of Fresh Minced Pork Meat

Nontyphoidal salmonellosis is the second most frequently reported zoonotic disease in the European Union (EU) and is considered to be a major threat to human health worldwide. The most reported Salmonella serovar in the EU is S. Enteritidis, mainly associated with egg contamination, followed by S. Typhimurium, with the latter being the most predominant serovar isolated from pork. These findings suggest that reducing the Salmonella contamination in the pork production might be a good strategy to prevent and control human salmonellosis in the EU. Recently, a quantitative microbial risk assessment (QMRA) has been developed to assess the risks for human salmonellosis due to home consumption of fresh minced pork meat in Belgium.⁽ 1 ⁾ The newly developed risk model is called the METZOON model. In the current study, the METZOON model was used to evaluate the effectiveness of different hypothetical Salmonella mitigation strategies implemented at different stages of the minced pork production and consumption chain by means of a scenario analysis. To efficiently evaluate the mitigation strategies, model results were obtained by running simulations using the randomized complete block design. The effectiveness of a mitigation strategy is expressed using point and interval estimates of the effect size for dependent observations, expressed as the standardized difference in population means. The results indicate that the most effective strategies are taken during the slaughter processes of polishing, evisceration, and chilling, and during postprocessing, whereas interventions in the primary production and at the beginning of the slaughter process seem to have only a limited effect. Improving consumer awareness is found to be effective as well.     

Maternal Sensitivity and Child Responsiveness: Associations with Social Context,Maternal Characteristics,and Child Characteristics in a Multivariate Analysis

This study examined unique associations of multiple distal context variables (family socioeconomic status [SES], maternal employment, and paternal parenting) and proximal maternal (personality, intelligence, and knowledge; behavior, self‐perceptions, and attributions) and child (age, gender, representation, language, and sociability) characteristics with maternal sensitivity and child responsiveness in 254 European American mothers and their firstborn 20‐month‐olds. Specific unique relations emerged in hierarchical regression analyses. Mothers who worked fewer hours per week and reported less dissonance in their husbands' didactic parenting, whose children spoke using more vocabulary, and who reported less limit setting in their parenting and attributed their parenting failures to internal causes were observed to be more sensitive in their interactions with their children. Children in higher SES families, whose mothers worked fewer hours and attributed their parenting failures to internal causes, and who themselves used more vocabulary were observed to be more responsive in their interactions with their mothers. Although potential associations are many, when considered together, unique associations with maternal sensitivity and child responsiveness are few, and some are shared whereas others are unique.