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11.
Jon Marquis Esma S. Gel John W. Fowler Murat Kksalan Pekka Korhonen Jyrki Wallenius 《决策科学》2015,46(5):981-1006
We investigate the impact of the number of human–computer interactions, different interaction patterns, and human inconsistencies in decision maker responses on the convergence of an interactive, evolutionary multiobjective algorithm recently developed by the authors. In our context “an interaction” means choosing the best and worst solutions among a sample of six solutions. By interaction patterns we refer to whether preference questioning is more front‐, center‐, rear‐, or edge‐loaded. As test problems we use two‐ to four‐objective knapsack problems, multicriteria scheduling problems, and multiobjective facility location problems. In the tests, two different preference functions are used to represent actual decision maker preferences, linear and Chebyshev. The results indicate that it is possible to obtain solutions that are very good or even nearly optimal with a reasonable number of interactions. The results also indicate that the algorithm is robust to minor inconsistencies in decision maker responses. There is also surprising robustness toward different patterns of interaction with the decision maker. The results are of interest to the evolutionary multiobjective (EMO) community actively developing hybrid interactive EMO approaches. 相似文献
12.
Prof. Pekka Korhonen Ms. Sari Stenfors Prof. Jyrki Wallenius 《Zeitschrift für Betriebswirtschaft》2007,77(3):251-270
Summary The role of decision tools in managerial decisions can be crucial. Yet, there is very little research seeking to understand
and measure the influence of planning models on decision-makers’ actual behavior or performance.
We focus on investigating, in an experimental context, the influence of a decision model (time allocation model) on student
subjects’ changes of mind and behavior. Of special interest is the effect of the articulated importance of criteria on subjects’
choices. Furthermore, we have also studied how the above mentioned model influences subjects’ actual (measurable) performance.
The results are partly conflicting, though interesting: (1) the (biased) decision model did have a significant influence on
the subjects’ choices, (2) when the model provided additional freedom to improve criterion values, the subjects’ choices were
rather inconsistent with the articulated importance of criteria, (3) the interpretation is not clear, how plans influence
actual behavior, and (4) the subjects did not fully recognize the bias of the model (when present). However, our findings
very clearly demonstrate that model developers have a great responsibility. Biased models may guide managers to make dramatically
erroneous decisions in bona fide. We hope that our findings generate additional research into this important, but under-researched
topic.
相似文献
13.
Abstract. Stochastic production frontiers are used for estimating regional matching functions where unemployment outflow is ‘produced’ by the unemployed and vacancies. The frontier is estimated using regional panel data from Finland from 1988 to 1997 and the Battese and Coelli frontier model, where the explanatory factors are included in the inefficiency term. The stochastic frontier matching function has constant returns, whereas in OLS estimation with fixed effects the returns are slightly increasing. Unemployment and vacancies in neighbouring regions have a spillover effect on efficiency. Excess job reallocation in a region deteriorates matching efficiency. The decomposition of total factor productivity change in matching to efficiency change and change in matching technology is also investigated by interpreting the matching frontier as a distance function and using Malmquist indexes. There is a downward trend in the technology, but short‐term variations are dominated by cyclical changes in efficiency. 相似文献
14.
Pekka Pälli 《Long Range Planning》2018,51(3):436-450
Adding to the existent research on strategy as discourse and practice, this paper develops a language-based approach to viewing the agency and materiality of strategy. The study draws insights from the communicative constitution of organization (CCO) approach and linguistic agency to investigate how organizational members ascribe materiality and performative agency to strategy in their talk-in-interaction. The data consist of 14 video-recorded dyadic manager-to-manager conversations from one private and one public Finnish organization. The findings highlight how strategy is habitually spoken of as a material concrete entity and as a nonhuman agent that makes a difference in the course of described actions. The findings thus suggest that the performative position of strategy has been encoded in language and its use, which further suggests that object-like concreteness and agentivity are key elements of the organizational strategy discourse. 相似文献
15.
Karinkanta S Nupponen R Heinonen A Pasanen M Sievänen H Uusi-Rasi K Fogelholm M Kannus P 《Journal of aging and physical activity》2012,20(2):198-214
This randomized, controlled trial evaluated the effects of exercise on health-related quality of life (HRQoL) and fear of falling (FoF) among 149 home-dwelling older women. The 12-mo exercise program was intended to reduce the risk of falls and fractures. HRQoL was assessed by the RAND-36 Survey, and FoF, with a visual analog scale, at baseline, 12 mo, and 24 mo. On all RAND-36 scales, the scores indicated better health and well-being. The exercise had hardly any effect on HRQoL; only the general health score improved slightly compared with controls at 12 mo (p = .019), but this gain was lost at 24 mo. FoF decreased in both groups during the intervention with no between-groups difference at 12 or 24 mo. In conclusion, despite beneficial physiological changes, the exercise intervention showed rather limited effects on HRQoL and FoF among relatively high-functioning older women. This modest result may be partly because of insufficient responsiveness of the assessment instruments used. 相似文献
16.
An analysis of longitudinal data on Finnish older adults shows that the probability of admission to long-term institutional care is inversely associated with household income: women in the lowest income quintile are 35 per cent more likely, and men in the lowest quintile 59 per cent more likely to be admitted than those in the highest quintile, independently of age, first language, and area characteristics. Controlling for other socio-demographic characteristics and medical conditions reduces these differences by 59 and 78 per cent, respectively. Being a renter and living in poorly equipped housing increases the probability of admission to institutional care, while the possession of a car and living in a detached house decreases it, independently of other factors. These results imply that the future need for institutional care will depend not only on the increasing numbers of older people but also on socio-economic factors and housing conditions. 相似文献
17.
A considerable problem in statistics and risk management is finding distributions that capture the complex behaviour exhibited by financial data. The importance of higher order moments in decision making has been well recognized and there is increasing interest in modelling with distributions that are able to account for these effects. The Pearson system can be used to model a wide scale of distributions with various skewness and kurtosis. This paper provides computational examples of a new easily implemented method for selecting probability density functions from the Pearson family of distributions. We apply this method to daily, monthly, and annual series using a range of data from commodity markets to macroeconomic variables. 相似文献
18.
Cross-sectional analyses of adult lifespan variation have found an inverse association between socioeconomic position and lifespan variation, but the trends by social class are unknown. We investigated trends in lifespan variation over four decades (1971–2010) by occupational social class (manual, lower nonmanual, upper nonmanual, other) using Finnish register data. We performed age and cause-of-death decompositions of lifespan variation for each sex (a) by occupational class over time and (b) between occupational classes at a shared level of life expectancy. Although life expectancy increased in all classes, lifespan variation was stable among manual workers and decreased only among nonmanual classes. These differences were caused by early-adult mortality: older-age lifespan variation declined for all the classes, but variation in early-adult mortality increased for all classes except the highest. The manual class’s high and stagnant lifespan variation was driven by declines in circulatory diseases that were equally spread over early mortality-compressing and older mortality-expanding ages, as well as by high early-adult mortality from external causes. Results were similar for men and women. The results of this study, which is the first to document trends in lifespan variation by social class, suggest that mortality compression is compatible with increasing life expectancy but currently achieved only by higher occupational classes. 相似文献
19.
Katarina Alanko Pekka Santtila Katarina Witting Markus Varjonen Patrik Jern Ada Johansson 《Journal of sex research》2013,50(5):494-504
This study explores the relation between the level of current symptoms of depression and anxiety and recalled childhood gender atypical behavior (GAB), and quality of relationships with parents among men and women who reported same-sex sexual attraction or engaged in same-sex sexual behavior and men and women who did not. Matched pairs, 79 men (n = 158) and 148 women (n = 296), with equal levels of GAB were created of Finnish participants with either same-sex sexual attraction or behavior and participants without. The measures used were retrospective questionnaires. Ratings of maternal and paternal over-control and coldness differed as a function of same-sex sexual attraction or behavior. Childhood GAB was correlated with negative ratings of parental relationships. Both same-sex sexual attraction or behavior and a history of childhood GAB affected the reported levels of current depression and anxiety. Only gender typical participants with no same-sex sexual attraction or behavior reported significantly lower levels of symptoms. The findings suggest that childhood GAB is related to later distress both among hetero- and homosexual individuals. The elevated level of psychological distress among homosexual individuals, reported in several studies, might—to some extent—be caused by their generally higher levels of childhood GAB as opposed to a homosexual orientation per se. 相似文献
20.
This qualitative cross-cultural study sought to contribute to the understanding of listening competence, dialogic listening, and the use of human agency in promoting well-being at work. The participant groups (N = 103) consisted of n = 76 U.S.-American and n = 27 Finnish attorneys. Results suggest that in order to examine listening and well-being at work, a term professional listening competence had to be constructed. The results further suggest that a sense of a strong professional listening competence leads to positive experiences of self-efficacy and personal agency regarding the management of professional interaction by listening. These empowering experiences serve to alleviate work-related stress and have a positive effect on well-being at work. 相似文献