Eisinga, R.; Franses, Ph.H.B.F.; Ooms, M. - Erasmus University Rotterdam, Econometric Institute - 1997
-Theory- Two theories about trends in left-right political orientations are juxtaposed: the persistence theory claiming that left-right orientations are highly resistant to change versus the irrelevance theory anticipating a move of mass publics towards the center of the left-right continuum....