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Gene Ellis

Eurozone: Looking for growth | vox - 0 views

www.voxeu.org/...eurozone-looking-growth

looking growth vox

shared by Gene Ellis on 25 Mar 13 - No Cached
  • Empirical evidence suggests deleveraging episodes accompanied by a housing crisis will take on average five and a half years across high-income OECD countries (or seven years when accompanied by a banking crisis (Aspachs-Bracon et al. 2011, IMF 2012).
  • Little resolution of banking-sector difficulties in the Eurozone suggests that deleveraging and credit will probably remain slow and impaired for much longer than previously thought. Recoveries that happen without credit are, on average, a third longer than recovery episodes with credit (Darvas 2013).
  • Damages to trend growth are notoriously difficult to assess,
  • ...10 more annotations...
  • In addition, observed GDP growth tends to be revised until several years after the first estimate
  • Our work is based on a simple Solow growth-accounting methodology.
  • A common feature of all economies is a collapse in productivity, which is typical of a big recession. In addition, Spain and Italy also underwent a very sharp labour contraction.
  • The additional effect of ageing.
  • A downside risk is that investment growth does not recover fully (for example, because banks fail to provide the necessary funding). In this case, we assume investment growth is only half what it was before the onset of economic turmoil.
  • We also estimate productivity through a convergence equation, which would slightly lift productivity in peripheral countries in the future.
  • This exercise suggests that in the absence of policy reforms, trend growth will have been damaged significantly, by at least one percentage point, post-crisis, compared with pre-crisis levels,
  • In the event that investment fails to recover quickly
  •  or unemployment levels take longer to fall than in previous recovery episodes, then trend growth would be significantly lower for longer. Trend growth might well remain negative in Spain and Italy, and may fail to increase for Germany or France.
  • this exercise shows the damage will indeed be long lasting, permanently impairing growth in a context of an ageing population that needs higher growth capacity than ever before.
Gene Ellis

New Truths That Only One Can See - NYTimes.com - 0 views

www.nytimes.com/...ths-that-only-one-can-see.html

methodology

shared by Gene Ellis on 22 Jan 14 - No Cached
  • New Truths That Only One Can See
  • Given the desire for ambitious scientists to break from the pack with a striking new finding, Dr. Ioannidis reasoned, many hypotheses already start with a high chance of being wrong
  • Taking into account the human tendency to see what we want to see, unconscious bias is inevitable.
  • ...5 more annotations...
  • The effect is amplified by competition for a shrinking pool of grant money and also by the design of so many experiments — with small sample sizes (cells in a lab dish or people in an epidemiological pool) and weak standards for what passes as statistically significant.
  • If one of five competing labs is alone in finding an effect, that result is the one likely to be published.
  • Among them is a paper in which C. Glenn Begley, who is chief scientific officer at TetraLogic Pharmaceuticals, described an experience he had while at Amgen, another drug company. He and his colleagues could not replicate 47 of 53 landmark papers about cancer. Some of the results could not be reproduced even with the help of the original scientists working in their own labs.
  • Scientists talk about “tacit knowledge,” the years of mastery it can take to perform a technique. The image they convey is of an experiment as unique as a Rembrandt.
  • The problem stands to get worse. It has been estimated that the corpus of scientific knowledge has doubled in size every 10 to 15 years since the days of Isaac Newton.
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