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Environmental Abatement and the Macroeconomy in the Presence of Ecological Thresholds

机译：存在生态阈值时的环境减缓与宏观经济

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摘要

We study the environmental and economic effects of public abatement in the presence of multiple stable steady-state ecological equilibria featuring reversible hysteresis. The isocline for the stock of pollution possesses two stable branches. Assuming that the ecology is initially located on the upper (high pollution) branch of the isocline, a simple time-invariant temporary abatement policy can be used to steer the environment from the high- to the low-pollution equilibrium. In all models considered in this paper, a "cold turkey" abatement policy is optimal within the class of stepwise policies, i.e. the largest feasible shock should be administered for the shortest possible amount of time. The cold-turkey result is robust to alternative models for the economic system, although there is a capital feedback effect that either helps or hinders the speed of transition to the low-pollution equilibrium.
机译：我们研究了具有可逆磁滞的多重稳定稳态生态平衡存在下的公共减排对环境和经济的影响。污染物存量的等斜线具有两个稳定的分支。假设生态系统最初位于等高线的上层（高污染）分支，则可以使用简单的时不变临时减排策略来将环境从高污染平衡转向低污染平衡。在本文考虑的所有模型中，在逐步策略类别中，“冷火鸡”减排策略是最佳的，即应在尽可能短的时间内执行最大的可行冲击。尽管存在资本反馈效应，这有助于或阻碍向低污染均衡过渡的速度，但冷火的结果对经济体系的替代模型具有鲁棒性。

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