Comparative statics with adjustment costs and the Le Chatelier principle

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Tác giả: Eddie Dekel, John K. -H Quah, Ludvig Sinander

Ngôn ngữ: eng

Ký hiệu phân loại: 526.5 Mathematical geography

Thông tin xuất bản: 2022

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Bộ sưu tập: Metadata

ID: 195314

We develop a theory of monotone comparative statics for models with adjustment costs. We show that comparative-statics conclusions may be drawn under the usual ordinal complementarity assumptions on the objective function, assuming very little about costs: only a mild monotonicity condition is required. We use this insight to prove a general Le Chatelier principle: under the ordinal complementarity assumptions, if short-run adjustment is subject to a monotone cost, then the long-run response to a shock is greater than the short-run response. We extend these results to a fully dynamic model of adjustment over time: the Le Chatelier principle remains valid, and under slightly stronger assumptions, optimal adjustment follows a monotone path. We apply our results to models of saving, production, pricing, labor supply and investment.
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