其他收费电视更可能与发行商进行平价交易，发行商在付出一笔许可费后就能保留从新订户身上获得的收入。
The other premium networks are more likely to do flat-rate deals in which the distributors keep all the money from new subscriptions after paying a single licence fee.
这应支持敞开式利率平价理论，挫败套息交易。
So this should give support touncovered-interest parity and deter the carry trade.
不过，购买力平价仅适用于便于跨境交换的可交易商品，比如大宗商品或电子产品。
But PPP only applies to tradable goods that are easily exchanged across borders, like commodities or electronics.
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