The value of goods export and import is computed by free-on-board price, the value of services import and export by market price when transaction actually occurs.

货物出口和进口价值都按离岸价格计算，服务出口和进口价值按交易发生时的市场价格计算。

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The result shows the demand of the U. S. market, the import and PPI are positive to the export, while the labor cost, the industrial added value and the exchange rate are negative to the export.

研究结果表明，美国市场需求、我国进口、国内原材料价格与我国出口贸易正相关，而国内劳动力成本、我国工业增加值增速、人民币汇率与出口贸易负相关。

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And when US firms that imagine a product, then package, market and sell it, can import cheaper inputs, that improves profit margins, adding to shareholder value.

FORBES: Stock Returns Versus GDP