Market Imperfections and Macroeconomic Dynamics formatIsbn:Hardcover 9780792374046 the identification of physical processes 70174 Stuttgart the identification of physical processes capable of producing the observed rich morphological variety of jets and bipolar outflows and supporting them over long lifetimes is still controversial wobei man schließlich doch noch die gewünschte Substanz in kläglicher Ausbeute und ge­ wöhnlich noch kläglicherem Reinheitsgrad erhält these contributions exemplify the remarkable progress made by macroeconomists in tackling these issues Such effects are of great interest to researchers in macroeconomics as these imperfections play a primary role in the persistence of aggregate output