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461.
Periodically integrated time series require a periodic differencing filter to remove the stochastic trend. A non-periodic integrated time series needs the first-difference filter for similar reasons. When the changing sea- sonal fluctuations for the non-periodic integrated series can be described by seasonal dummy variables for which the corresponding parameters are not constant within the sampie, such a series may not be easily & stinguished from a periodically integrated time series. In this paper, nested and non-nested testing procedures are proposed to distinguish between these two alternative stochastic and non-stochastic seasonal processes, When it is assumed there is a single unknown structural break in the seasonal dummy parameters. Several empirical examples using quarterly real macroeconomic time series for the United Kingdom illustrate the nested and non-nested approaches. 相似文献
462.
We propose to use the term standard distance for the quantity in univariate analysis and show that it can be easily generalized to the multivariate situation, where it coincides with the square root of the Mahalanobis distance between two samples. 相似文献
463.
464.
Hans Bugge Bergsund Tonje Naas Kullerud Cathrine Abbasi Kråkenes Filip Drozd Tore Wentzel-Larsen Vibeke Moe Heidi Jacobsen 《International Journal of Social Welfare》2023,32(2):221-229
Transportation of evidence-based programs (EBPs) to a new cultural setting is often preferred over the comprehensive process of developing a new program. Intervention fidelity has been suggested as a predictor of successful transportation. The present study examined whether fidelity and parent behavior improved when implementing the U.S.-developed Attachment and Biobehavioral Catch-up (ABC) intervention in Norwegian child welfare services (CWS). 11 child welfare workers received training and supervision to become ABC parent coaches. Fidelity was assessed through video-recordings of parent coaches' in vivo feedback at each home-visit session. Parent sensitive behavior was assessed using video-recordings of parent–child interactions, recorded before each ABC session. Mixed effects modeling showed that ABC fidelity increased over the course of training and supervision. Furthermore, parent behavior improved over the course of families' exposure to the intervention. These demonstrate that an EBP transported to a novel cultural setting can obtain promising levels of fidelity and intervention outcomes. 相似文献
465.
ABSTRACT: Manpower requirement forecasts are usually based on the assumption that discrepancies between supply and demand do not lead to adjustment processes at the labour market. We show, however, that even if the market mechanism functions completely, manpower requirement forecasts remain important information. On this basis, a manpower requirement approach is developed which incorporates the possibility of substitution processes at the labour market. 相似文献
466.
Hans Gersbach 《Journal of the European Economic Association》2009,7(6):1436-1469
We introduce democratic mechanisms as a set of rules that must obey liberal democracy's fundamental principles of equal voting and agenda rights. We show that an appropriate combination of three rules may yield efficient provision of public projects: first, flexible and double majority rules, where the size of the majority depends on the proposal, and taxed and non‐taxed individuals need to support the proposal; second, flexible agenda costs, where the agenda‐setter has to pay a certain amount of money if his proposal does not generate enough supporting votes; third, a ban on subsidies. We highlight that universal equal treatment with regard to taxation is undesirable. Finally, we illustrate how simple constitutions involving fixed super majority rules yield socially desirable outcomes if the agenda‐setter is benevolent. (JEL: D62, D72, H40) 相似文献
467.
Abstract. This study has been carried out by the Research Centre for Education and Labour Market (ROA) as part of a long-range research project commissioned by the Ministry of Education and Sciences. The objective of the project is to develop an education/labour-market information system to help secondary and university students choose the right type of school and/or occupation (ROA 1988). The study reported on here sets out to disclose the factors underlying the development of the occupational pattern. The shares of occupational classes in each economic sector are taken as points of departure. The explanatory variables are technological progress and cyclical and structural sectoral developments. For each occupational class, an estimation is made with the help of a linear model, the estimation method being that of Weighted Least Squares. To permit several variables to be included in the equation, the data have been pooled over sectors and time. In two fifths of all cases, a model with explanatory variables has been chosen; in the remaining instances a sector-dummy model was found to suffice. 相似文献
468.
Arjen van Assen Wendy Post Hans Grietens Jana Knot-Dickscheit 《Child & Family Social Work》2023,28(2):321-336
Studies investigating services for families experiencing complex and multiple problems have emphasized the need for more child-centred support. The aim of this longitudinal study was to investigate whether providing child-centred services (Child and Youth Coaching) combined with family-focused services (Ten for the Future) is effective for children growing up in families experiencing complex and multiple problems. Children's psychosocial skills, emotional and behavioural problems, and the quality of their pedagogical environment were measured at baseline, 6 months and 12 months. Parent and coach reports of children indicated for Child and Youth Coaching (n = 57) and nonindicated children (n = 18) were analysed using repeated measures multilevel models. Both parents and coaches reported improved psychosocial skills of children, but changes were only significant for coach reports. In both reports, no significant decrease in emotional and behavioural problems was observed for both indicated and nonindicated children. Many children still experienced considerable problems at case closure. Furthermore, no significant improvement in quality of the pedagogical environment was observed in both groups. Given the limitations in this study, more research is needed to identify whether these findings can be replicated and attributed to the Child and Youth Coaching and Ten for the Future programmes. 相似文献