Production often causes pollution as a by-product. Once pollution problems become too severe, regulation is introduced by political authorities which forces the economy to make a transition to cleaner production processes. We model this transition as a change in "general purpose technology"...

Deflation has emerged as a new concern for Asian policy makers. The traditional view is that deflation can lead to a vicious cycle of falling demand and prices, and is thus a dangerous condition. However, another school of thought emphasizes the role of positive supply shocks and takes a more...