The Australian economist, Joshua Gans, recently described a problem central to the current financial turmoil. How could he persuade his young son not to wet his pants?
澳大利亚manbetx20客户端下载 学家乔舒亚•甘斯(Joshua Gans)最近谈到了当前金融危机的一个核心问题。他如何才能说服自己年幼的儿子不尿裤子?
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