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This dissertation compares the parameter estimates obtained from two item response theory (IRT) models: the 1-PL IRT model and the MC1-PL IRT model. Several scenarios were explored in which both unidimensional and multidimensional item-level and personal-level data were used to generate the item...
Persistent link: https://www.econbiz.de/10009456838
clustering models based on Gaussian mixture models (GMMs) which are fitted with the use of the recently developed variational ….e., the temporal usage behaviour, and developing clustering algorithms suitable for high dimensional data based on the use of …
Persistent link: https://www.econbiz.de/10009438102
Due to the change in attitudes and lifestyles, people expect to find new partners and friends via various ways now-a-days. Online dating networks create a network for people to meet each other and allow making contact with different objectives of developing a personal, romantic or sexual...
Persistent link: https://www.econbiz.de/10009438155
-means clustering were simulated within the the Farm-level Economic Model (FEM) to determine the economic impacts of four manure …
Persistent link: https://www.econbiz.de/10009443280
, data mining method clustering was undertaken to identify the customersegments. Two different clustering methods were tested …
Persistent link: https://www.econbiz.de/10009467253
model (GPPM) in which the partition process is predictor-dependent. The GPPM generalizes DP clustering to relax the …
Persistent link: https://www.econbiz.de/10009475421
Ranked preference data arise when a set of judges rank, in order of their preference, a set of objects. Such data arise in preferential voting systems and market research surveys. Covariate data associated with the judges are also often recorded. Such covariate data should be used in conjunction...
Persistent link: https://www.econbiz.de/10009475695
spline basis expansion of the time-varying regression coefficients to reduce dimensionality, and downweight the influence of … dissertation, we propose a robust clustering method based on the EM algorithm applied to a modified multivariate normal density …
Persistent link: https://www.econbiz.de/10009477900
explain the phenomenon of geographical clustering of economic activity. Nonetheless, as many studies in these fields point out … chapter 3 the concept of LKS is defined and its importance for the theory of geographical clustering as well as for New Growth … clustering.In chapter 8 the analysis turns to the welfare implications of different types of market mediated knowledge exchanges …
Persistent link: https://www.econbiz.de/10009449724
This thesis is comprised of three chapters. The first investigates the implications of industrial clustering for labor … exploit establishment-level variation in agglomeration to explore the impact of clustering in the software publishing industry … on labor market outcomes. The results show that clustering makes it easier for workers to job hop among establishments …
Persistent link: https://www.econbiz.de/10009450588