Feature extraction and dimension reduction can be combined in one step using principal component analysis ( PCA ), linear discriminant analysis ( LDA ), or canonical correlation analysis ( CCA ) techniques as a pre-processing step followed by clustering by K-NN on feature vectors in reduced-dimension space.
12.
SEM evolved in three different streams : ( 1 ) systems of equation regression methods developed mainly at the Cowles Commission; ( 2 ) iterative maximum likelihood algorithms for path analysis developed mainly by Karl Gustav J�reskog at the Educational Testing Service and subsequently at the University of Uppsala; and ( 3 ) iterative canonical correlation fit algorithms for path analysis also developed at the University of Uppsala by Hermann Wold.
13.
His habilitation thesis focused on multiple regression models of global development, based on data from the World Bank and Volker Bornschier as well as the " World Handbook of Political and Social Indicators III ", and tests the relevance of socio-liberal approaches to world development, already inherent in the writings of classical social democratic development theories in Europe in the 1930s with multiple regression and canonical correlation models.
