Information-intensive products – typical of today’s technologically advanced economies – are different. Because the cost of providing an extra copy is almost nil, it is hard to charge for them.
而那些信息密集型的产品——当今这些科技发达经济体中非常常见——则完全不同。因为多生产一份内容的成本基本为零，因此也很难对此收费。