Existing definitions of agency are inadequate. In this paper, I offer a new definition of agency: a relationship is one of agency where the agent has a power to exercise at least one of the principal's own powers. I call this a “proxy power” for short. This definition brings with it three advantages. First, focusing on the agent's proxy power highlights the distinctive idea at the core of agency: that people can act through others at law, thereby expanding their legal personality in space. Second, that distinctive idea then helps identify the three reasons justifying when an agent has a proxy power: the principal's unilateral manifestation of will, the necessity of protecting the principal's interests, and where the principal is an artificial person who can only unilaterally manifest his will through an agent. Third, the definition vindicates prevailing intuitions about agency, and gives us a more transparent way to decide whether or one's invocation of “agency” is illegitimate or legitimate.

中文翻译：

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理解机构：代理权力定义

现有的代理定义是不充分的。在本文中，我提出了代理的新定义：一种关系是一种代理，其中代理人有权行使至少一项委托人自己的权力。我将其简称为“代理权”。这个定义带来了三个好处。首先，关注代理人的代理权，突出了代理人核心的鲜明理念：人们可以通过他人在法律上行事，从而在空间上扩大其法律人格。其次，这一独特的想法有助于确定代理人何时具有代理权的三个理由：委托人单方面表示意志，保护委托人利益的必要性，以及委托人是只能单方面表示其意志的人造人通过代理。第三，