Computes the elementary risk measure for a given ditribution
expvar(spec, alpha, a, b, ...)
a character string specifying the distribution (for example, "norm" corresponds to the standard normal)
a positive valued parameter, see Chan and Nadarajah for details
the lower end point of the distribution specified by spec
the upper end point of the distribution specified by spec
other parameters
An object of the same length as alpha
, giving the elementary risk measure of the distribution specified by spec
S. Chan and S. Nadarajah, Risk: An R package for risk measures, submitted
A. Ahmadi-Javid, Entropic value-at-risk: A new coherent risk measure. Journal of Optimization Theory and Applications, 155, 2012, 1105-1123 <DOI:10.1007/s10957-011-9968-2>