Arnold Heertje
Arnold Heertje ( 19 February 1934 – 4 April 2020 ) was a Dutch economist and professor at the University of Amsterdam , writer and columnist . 
<triplet> Arnold Heertje <subj> 19 February 1934 <obj> date of birth <subj> 4 April 2020 <obj> date of death <subj> University of Amsterdam <obj> educated at