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Environmental policy and growth when inputs are differentiated in pollution intensity

机译：当投入的污染强度有所不同时的环境政策和增长

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摘要

Environmental policy affects the distribution of market shares if intermediate goods are differentiated in their pollution intensity. When innovations are environment-friendly, a tax on emissions skews demand towards new goods which are the most productive. In this case, the tax has to increase along a balanced growth path to keep the market shares of goods of different vintages constant. Comparing balanced growth paths, we find that tightening the policy stance spurs innovation, because it increases the market share of recent vintages, and promotes environment-friendly technological progress. As a result the cost of environmental policy in terms of slower growth is weaker.
机译：如果中间产品的污染强度不同，则环境政策会影响市场份额的分配。当创新对环境友好时，对排放征税会使对生产效率最高的新产品的需求倾斜。在这种情况下，税收必须沿着均衡的增长路径增加，以保持不同年份商品的市场份额不变。比较均衡的增长路径，我们发现收紧政策立场会刺激创新，因为它增加了最近年份的市场份额，并促进了环境友好型技术的进步。结果，就增长放缓而言，环境政策的成本较弱。

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