Any merchant trading beyond the scale that can be handled by a single individual has to use other people – agents – to do business on his behalf. This is particularly important in long-distance trade, which can be more efficiently conducted if one trader stays home to manage the local end of the business, while his partners or agents trade abroad, enabling the business to trade simultaneously in multiple locations and diversify its activities.

But once a merchant gets someone else to trade on his behalf, he confronts the principal-agent problem. An agent entrusted with a merchant's capital or wares has an incentive to pursue his own interests at the expense of his principal. If the probability of misconduct by agents is too high, principals will not employ them.