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本文构建了企业最优出口参与和供给模型,基于浙江省2001~2003年的企业面板数据,采用Heckman两步法对出口参与方程和出口供给方程进行联合估计。研究结果表明,只有生产率较高的企业才能克服出口市场的沉没成本,通过自我选择进入出口市场,而生产率较低的企业会退出;一旦企业选择进入出口市场,将从出口市场中积累出口学习经验,从而降低企业生产成本,提高企业最优出口供应量。
This paper constructs the optimal export participation and supply model of the enterprise. Based on the enterprise panel data of Zhejiang province from 2001 to 2003, the Heckman two-step method is used to estimate the export participation equation and the export supply equation jointly. The results show that only firms with higher productivity can overcome the sunk cost of the export market and enter the export market through self-selection, while those with lower productivity will exit. Once the enterprises choose to enter the export market, they will accumulate export learning experience from the export market , Thereby reducing production costs, improve the optimal export supply.