Nonparametric Methods in Continuous Time Model Specification

Some popular parametric diffusion processes have been assumed as such underlying diffusion processes. This paper considers an important case where both the drift and volatility functions of the underlying diffusion process are unknown functions of the underlying process, and then proposes using two novel testing procedures for the parametric specification of both the drift and diffusion functions. The finite-sample properties of the proposed tests are assessed through using data generated from four popular parametric models. In our implementation, we suggest using a simulated critical value for each case in addition to the use of an asymptotic critical value. Our detailed studies show that there is little size distortion when using a simulated critical value while the proposed tests have some size distortions when using an asymptotic critical value in each case.     

A Delphi Method Expert Survey to Derive Standards for Flood Damage Data Collection

For the purpose of flood damage analyses reliable, comparable, comprehensive, consistent, and up-to-date data are an indispensable need. Like in many other countries a database with this kind of datasets does not exist in Germany. To establish it, standards have to be set for flood damage data collection. We approached this problem by questioning experts about their information needs for flood damage analysis. This survey is done by applying a Delphi survey approach. The aptitude of the Delphi approach to assess, structure, and standardize expert knowledge is evaluated in this article. In the survey a panel of 55 experts working in the field of flood damage analysis for insurances, engineering companies/consultancy, public water management, and universities and other scientific institutions helped to identify common information needs. The multi-step Delphi method proved to reduce the deviation of answers thereby enabling consensual results and also enhanced the quality by modifying group answers in the direction of experience based answers. There was also a high level of congruence in information needs between experts from different fields of employment that allowed the derivation of common standards.     

Spatial distribution and the value of green spaces for urban red-tailed hawks

Raptors increasingly live and nest successfully in urban areas. In the urban landscape of Hartford, CT, red-tailed hawks established home ranges in large green spaces such as parks, golf courses, and cemeteries but also nested successfully in the commercial district of downtown and in densely built urban and suburban neighborhoods. Data collected from 11 radio-tagged breeding adult hawks indicated that year-round home ranges averaged 107.7 ha, much smaller than home ranges reported for hawks inhabiting rural areas. Most hawk home ranges had multiple core areas that were usually associated with favored perches or larger patches of ‘usable’ green space, defined as patches ≥0.25 ha in size, and home range size was positively associated with larger usable green space patches in core areas. Most nests were located in the largest core area and were within a larger patch of green space within the largest core area. Rather than just the amount or size of green space patches, the value of urban green spaces for these hawks likely also varies with the number and proximity of suitable perches such as buildings or tall trees, types and density of prey, and amount of human activity in and adjacent to these spaces. Territoriality and intraspecific competition may also influence home range size and dispersion of red-tailed hawks nesting in Hartford. In this urban area, mortality due to ingestion of rodenticides and collisions with vehicles affected hawk reproductive success.

     

Predictors of parenting stress in portuguese adolescents' adoptive parents

Parenting stress is related to the characteristics of both the child and the parents, as well as to parent–child interactions. In adoptive families, parenting stress has been identified as an indicator of the family's adjustment to adoption. The stress experienced by parents of adopted adolescents deserves special consideration, as adolescence is a critical period in the adoptees' developmental pathway. The present study aims to identify the adoptee, parents and family related predictors of the adoptive parents' parenting stress, exploring direct and indirect effects. Fifty Portuguese adolescents' adoptive parents participated in this study. Parenting stress was measured by the Stress Index for Parents of Adolescents, and the Strengths and Difficulties Questionnaire was used to evaluate the adoptees' (mal)adjustment, according to the parents' perspective. Variables related to the parents' experience of adoption were assessed resorting to the Parent's Interview about the Adoption Process. Results showed that parents' satisfaction and adoptees' adjustment were sequential mediators of the relationship between the parents' experience of family life and parenting stress. These findings provide new insights into adoption research in parenting stress, highlighting the importance of adoption‐related variables such as the parents' adoption experience within the family and family relationships.     

Infants’ Style of Emotion Regulation with Their Mothers and Fathers: Concordance between Parents and the Contribution of Father–Infant Interaction Quality

The concordance between infants’ emotion regulation styles with different partners has not been consistently analysed nor have the relational correlates of such potential across‐partners similarities. We explored these issues by assessing 10‐month‐olds’ (59.6 percent boys) emotion regulation styles separately with mother and father and by evaluating mother–infant and father–infant interaction quality. The sample consisted of 50 low‐risk families. Two home visits were conducted and similar procedures were adopted for each visit. Parent–infant interaction quality was assessed during daily routines and during free play; both parents independently completed a temperament questionnaire. Infant emotion regulation was assessed in a semi‐structured problem‐solving task: adaptive vs. maladaptive (under and over‐regulation) styles. As predicted, infants’ emotion regulation with their mothers and fathers were related. However, only father–infant interaction quality predicted infants’ emotion regulation concordance: lower interaction quality was associated with maladaptive concordance compared with non‐concordance and higher interaction quality was associated with adaptive concordance compared with non‐concordance. Our results support the claim that by the end of the first year of life, infants use similar emotion regulation styles with mother and father and point to father–infant interaction as an important correlate of emotion regulation across‐parents.     

Self‐Destructive Symptomatic Frames in Clinical Adolescents: Is the Same Different?

This study examines individual and family predictors of different self‐destructive patterns—only suicidal ideation, only nonsuicidal self‐injury (NSSI), or suicide attempts (that may also include both suicide ideation (SI) and NSSI)—in a sample of outpatient adolescents (N = 42; 86% females) with mean age of 16 years (SD = 1.86). Results indicated that there are differences in youngsters with self‐destructive behaviors in their perception of paternal rejection and maternal control, when compared with youngsters reporting only SI. Adolescents from the groups with self‐destructive behaviors differ only in age. Together, these data highlight the relevance of adopting an ecosystemic perspective, which includes both the patients and their families, regarding treatment and prevention of self‐destructive symptomatic frames.