The demand for measures of individual performance in the management of universities and research institutes has been growing, in particular since the early 2000s. The publication of the Hirsch Index in 2005 (Hirsch, 2005) and its popularisation by the journal Nature (Ball, 2005) has given this a strong stimulus. According to Hirsch, his index seemed the perfect indicator to assess the scientific performance of an individual author because “it is transparent, unbiased and very hard to rig”. The h-index balances productivity with citation impact. An author with a h-index of 14 has created 14 publications that each have been cited at least 14 times. So neither authors with a long list of mediocre publications, nor an author with 1 wonder hit are rewarded by this indicator. Nevertheless, the h-index turned out to have too many disadvantages to be wearing the crown of “the perfect indicator”. As Hirsch acknowledged himself, it…