We examine the impact of temporal and portfolio aggregation on the quality of Value-at-Risk (VaR) forecasts over a … based on asset class, or into a single portfolio. We compare the impact of aggregation to that of choosing a model for the … that the degree of temporal aggregation is most important. Daily returns form the best basis for VaR forecasts. Modelling …

largely due to a bias induced by the aggregation of skill types into broad categories. An assignment model is applied where …

There has been a revival of interest in the effect of risk on economic growth. We quantify both ex ante and ex post … effects of risk using a stochastic version of the Ramsey model. We develop a simulation-based econometric methodology which … remarkable long-running panel data set for rural households in Zimbabwe. We find that risk substantially reduces growth: in the …

The risk of investment in schooling has largely been ignored. We assess thevariance in the rate of return by surveying … skewed. Our best guess of ex ante risk in university education is a coefficient ofvariation of about 0.3, comparable to that …

disparities - which hitherto has received limited attention - is the risk people face about their future health. This paper … integrates risk into the standard inequality measurement which measures the extent to which disparities in realized health are … systematically associated with income. It develops a rank dependent inequality index that considers not only inequalities in expected …