Heterogeneous firms and homogenising standards in agri-food trade: the Polish meat case
构建了一个异质性企业的局部均衡贸易模型，分析波兰肉类生产遵守欧盟食品标准的影响，发现标准趋同会提高生产与出口集中度，并通过模拟展示了支持计划对贸易和市场结构的作用。
A partial equilibrium trade model with heterogeneous firms is developed and applied to the issue of compliance with the EU food standards in Polish meat production. The model parameters are estimated using a nonlinear least squares method to match the observed patterns of trade. With asymmetrically distributed productivities homogenising standards tend to increase the concentration of production and exports among the more productive and larger firms. Simulation analysis shows the trade and market structure impacts of support programmes in the context of EU accession. The simulations also highlight the importance of the substitution elasticity between varieties and effects of productivity upgrades.