@unpublished{GilchGriebelOettershagen2020, author = {Gilch, Alexandros and Griebel, Michael and Oettershagen, Jens}, title = {Multilevel Approximation for generalized Method of Moments Estimators}, annote = {article, inspreprint}, note = {Submitted to International Journal for Uncertainty Quantification. Available as INS Preprint No. 2006}, inspreprintnum = {2006}, year = {2020} }