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Distance measures for dynamic citation networks
Bommarito, Michael J.; Katz, Daniel Martin; Zelner, … - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 19, pp. 4201-4208
distance measure together with the single-linkage hierarchical clustering algorithm to both a two-dimensional directed … Supreme Court. Despite applying the simplest combination of distance measure and clustering algorithm, analysis reveals that …
Persistent link: https://www.econbiz.de/10010590935
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Exploring consumers' attitudes towards paper products that could be derived from transgenic plantations in Greece
Tsourgiannis, Lambros; Kazana, Vassiliki; … - In: International Journal of Data Analysis Techniques and … 7 (2015) 2, pp. 156-171
This paper aims at exploring consumers' purchasing behaviour towards paper products that could be derived from transgenic plantations. Field interviews were conducted to a randomly selected sample of 205 consumers, who declared that they would buy such paper products. Principal Components...
Persistent link: https://www.econbiz.de/10011266490
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Correlative coherence modelling of South Australian wind farms
Ward, K.; Korolkiewicz, M.; Boland, J. - In: Renewable Energy 52 (2013) C, pp. 154-159
In this paper, a new method is presented for quantifying dependence in output among wind farms connected to an electricity grid. Overall stability of a grid is an important consideration. If output of wind farms is highly correlated, serious stress can be placed on the local infrastructure and...
Persistent link: https://www.econbiz.de/10010804432
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The Special Sign Indeterminacy of the Direct-Fitting Parafac2 Model: Some Implications, Cautions, and Recommendations for Simultaneous Component Analysis
Helwig, Nathaniel - In: Psychometrika 78 (2013) 4, pp. 725-739
Parafac2 is the most flexible Simultaneous Component Analysis (SCA) model that produces an essentially unique solution. In this paper, we discuss how Parafac2’s special sign indeterminacy affects applications of SCA, and we reveal how an external criterion variable can be used to ensure that...
Persistent link: https://www.econbiz.de/10010848151
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A misspecification test for finite-mixture logistic models for clustered binary and ordered responses
Francesco, Bartolucci; Silvia, Bacci; Claudia, Pigini - Volkswirtschaftliche Fakultät, … - 2015
An alternative to using normally distributed random effects in modeling clustered binary and ordered responses is based on using a finite-mixture. This approach gives rise to a flexible class of generalized linear mixed models for item responses, multilevel data, and longitudinal data. A test of...
Persistent link: https://www.econbiz.de/10011274901
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A general model for two-level data with responses missing at random
McDonald, Roderick - In: Psychometrika 58 (1993) 4, pp. 575-585
Persistent link: https://www.econbiz.de/10005603375
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femlogit-Implementation of the multinomial logit model with fixed effects
Pforr, Klaus - In: Stata Journal 14 (2014) 4, pp. 847-862
Fixed-effects models have become increasingly popular in social-science research. The possibility to control for unobserved heterogeneity makes these models a prime tool for causal analysis. Fixed-effects models have been derived and implemented for many statistical software packages for...
Persistent link: https://www.econbiz.de/10011105651
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Within and between estimates in random-effects models: Advantages and drawbacks of correlated random effects and hybrid models
Schunck, Reinhard - In: Stata Journal 13 (2013) 1, pp. 65-76
Correlated random-effects (Mundlak, 1978, Econometrica 46: 69–85; Wooldridge, 2010, Econometric Analysis of Cross Section and Panel Data [MIT Press]) and hybrid models (Allison, 2009, Fixed Effects Regression Models [Sage]) are attractive alternatives to standard random-effects and fixed-effects...
Persistent link: https://www.econbiz.de/10010633314
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Dimensionality and Validity of the Serbian Version of the Life Orientation Test-Revised in a Sample of Youths
Jovanović, Veljko; Gavrilov-Jerković, Vesna - In: Journal of Happiness Studies 14 (2013) 3, pp. 771-782
The main aim of this research was to evaluate psychometric properties and dimensionality of the Serbian version of the …
Persistent link: https://www.econbiz.de/10010999149
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A Procedure for Dimensionality Analyses of Response Data from Various Test Designs
Zhang, Jinming - In: Psychometrika 78 (2013) 1, pp. 37-58
administered to any test takers, which may result in some complications during dimensionality analyses. In this paper, a modified … DETECT index is proposed in order to perform dimensionality analyses for response data from such designs. It is proven in … this paper that under certain conditions, the modified DETECT can successfully find the dimensionality-based partition of …
Persistent link: https://www.econbiz.de/10010848146