T here is always uncertainty about the soundness of an economic model’s structure and parameters. Therefore, central banks normally face with uncertainty about the key economic explanatory relationships. So, policymaker should take into account the uncertainty in formulating monetary policies. The present study is aimed to examine robust optimal monetary policy under uncertainty, by ...

recently, the economic crisis has resulted in instability in stock exchange market and this has caused high volatilities in stock value of exchanged firms. under these conditions, considering uncertainty for a favorite investment is more serious than before. multi-objective portfolio selection (return, liquidity, risk and initial cost of investment objectives) using minmax fuzzy goal programmin...

a r t i c l e i n f o Keywords: Stock returns Policy risks Technological risks US stock market This study examines the role of policy and technological risk on U.S. stock returns. The results will highlight the effect of economic policy uncertainty on stock returns, given that such uncertainty rose to historically high levels after the recession of 2007–2009. In our case, uncertainty is related...

BACKGROUND Parametric distributions based on individual patient data can be used to represent both stochastic and parameter uncertainty. Although general guidance is available on how parameter uncertainty should be accounted for in probabilistic sensitivity analysis, there is no comprehensive guidance on reflecting parameter uncertainty in the (correlated) parameters of distributions used to re...

The uncertainty which has characterised the financial crisis has encouraged renewed attention to uncertainty in economics. Yet, not only is uncertainty seen as unpalatable in financial markets and economic life more generally, it also poses challenges for economists to the extent that uncertainty is absent from most of mainstream theory. The purpose of this paper is to consider the reasons for ...

U ncertainty is an amorphous concept. It refl ects uncertainty in the minds of consumers, managers, and policymakers about possible futures. It is also a broad concept, including uncertainty over the path of macro phenomena like GDP growth, micro phenomena like the growth rate of fi rms, and noneconomic events like war and climate change. In this essay, I address four questions about uncertaint...