h(5,2) - the Best Citation Metric for Economics?

Glenn Ellison has written a paper titled: "http://ideas.repec.org/p/ces/ceswps/_3188.html">How Does the Market Use Citation Data? The Hirsch Index in Economics" on the use of Hirsch type citation metrics in economics. An author's Hirsch index is equal to h if they have published at least h papers cited at least h times. Ellison argues that generally economists write fewer papers than natural