On the Role of Technology Shocks as a Source of Business Cycles: Some New Evidence

2004 ◽  
Vol 2 (2-3) ◽  
pp. 372-380 ◽  
Author(s):  
Jordi Galí
2014 ◽  
Vol 52 (4) ◽  
pp. 993-1074 ◽  
Author(s):  
Paul Beaudry ◽  
Franck Portier

There is a widespread belief that changes in expectations may be an important independent driver of economic fluctuations. The news view of business cycles offers a formalization of this perspective. In this paper we discuss mechanisms by which changes in agents' information, due to the arrival of news, can cause business cycle fluctuations driven by expectational change, and we review the empirical evidence aimed at evaluating their relevance. In particular, we highlight how the literature on news and business cycles offers a coherent way of thinking about aggregate fluctuations, while at the same time we emphasize the many challenges that must be addressed before a proper assessment of the role of news in business cycles can be established. (JEL D83, D84, E13, E32, O33)


2016 ◽  
Vol 154 (4) ◽  
pp. 1051-1079 ◽  
Author(s):  
Sadok El Ghoul ◽  
Omrane Guedhami ◽  
Robert Nash ◽  
Ajay Patel

2006 ◽  
Vol 18 (5) ◽  
pp. 193-209 ◽  
Author(s):  
Richard J. Porter ◽  
Peter Gallagher

Background:New evidence is emerging regarding abnormalities of hypothalamic-pituitary-adrenal (HPA) axis function in subtypes of affective disorders. Adverse effects of HPA axis dysregulation may include dysfunction of monoaminergic transmitter systems, cognitive impairment and peripheral effects. Newer treatments specifically targeting the HPA axis are being developed.Objective:To review these developments focusing particularly on the glucocorticoid receptor (GR) antagonist mifepristone.Method:A selective review of the literature.Results:The function of GRs is increasingly being defined. The role of corticotrophin-releasing hormone (CRH) and dehydroepiandrosterone (DHEA) in the brain is also increasingly understood. HPA axis function is particularly likely to be abnormal in psychotic depression and bipolar disorder, and it is in these conditions that trials of the GR antagonist mifepristone are being focused. CRH antagonists and DHEA are also being investigated as potential treatments.Conclusion:Initial studies of mifepristone and other HPA-axis-targeting agents in psychotic depression and bipolar disorder are encouraging and confirmatory studies are awaited.


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