The difficulty', he writes, 'of passing from gross to net capital formation, that is, the difficulty of correcting for the consumption of existing durable commodities, is not only in the lack of data.

他写道，“从资本形成总额转变为净资本形成的困难， 即纠正现有耐用商品消费的困难， 不仅在于缺乏数据。