Barczyk, Ryszard2016-11-282016-11-281989Ruch Prawniczy, Ekonomiczny i Socjologiczny 51, 1989, z. 1, s. 177-194.0035-9629http://hdl.handle.net/10593/15891Western model analyses of contemporary cyclical processes are only sets of more or less proved hypotheses which do not form a consistent theoretical conception. A general purpose of the contribution is to present two main lines of Western theoretical analyses explaining contemporary cyclical flunctuations: neo-Keynesian and neoclassical. * The former interpretation, with its roots at J. M. Keynes theories, is a demand approach, with the source of fluctuations located first of all in combined mechanisms of investment multiphir and accelerator. The neoclassical approach is identified with a so-called balanced theory of the business cycle, where all oscilations are explained in terms of rational expectations of the economic subjects. In the analysed lines of theoretical research into cyclical fluctuations highly idealized assumptions are adopted. In effect, despite the use of extensive conceptual apparatus and formal mathematical instruments those conceptions can hardly meet the demands of the economic praxis.polinfo:eu-repo/semantics/openAccessArtykuł