 The publication suggested that most of U.S. wealth accumulation was not attributed to life-cycle saving, but rather to private intergenerational transfers (whether intended or unintended).The article was the subject of a lively debate between Kotlikoff and Franco Modigliani, who won the Nobel Prize in part for his work on the life-cycle model.Kotlikoff, together with Alan Auerbach and Jagadeesh Gokhale, pioneered Generational Accounting, which measures the fiscal burdens facing today's and tomorrow's children.