分析增值税对购销定价决策的影响应该符合双方交易原则，要考虑到自己的决策对供应方和购买方的影响以及他们可能的反应。
Abstract : The analysis of effect of VAT on decision-making of purchase-sale pricing should be based on the mutual transaction principle , which means decision-making should take the response of purchasers and sellers into consideration .
双方交易原则