设计指导部分解释了什么是模式元素，以及与这些元素相关联的替代和权衡。
A design guide section explains what the elements of the patterns actually are, and the alternatives and trade-offs associated with these elements.
我们使用来自PSID和ECHP的数据以评估人们选择配偶时在上述指标中所做的权衡，发现了人体测量特征和社会经济学特征可以互相替代的证据。
We estimate the trade-offs among these characteristics using data from the PSID and the ECHP, finding evidence of compensation between anthropometric and socioeconomic characteristics.
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