中国蔬菜产地价格的非对称反应:理论与实证分析

Price Asymmetric Reaction Mechanism of Vegetables Production Areas:Theoretical and Empirical Analysis

蔬菜产地价格对销地价格下跌的反应大于对其上涨的反应时会致使农户利益受损。利用非对称价格传递误差修正模型(APT-ECM)的检验结果显示:在每年的1月至6月以及10月至12月,包菜、芹菜、大白菜等耐寒易种植蔬菜产地集中度低,其产地价格对销地价格下降的反应要大于对其上涨的反应,产地价格呈现非对称反应;每年12月份至翌年4月份,黄瓜、番茄、青椒和豇豆等喜温果菜类生产集中度较高,产地价格对销地价格上涨和下跌反应呈对称性。

Price asymmetric reaction of vegetable production areas damages the interests of farmers.This article theoretically and empirically analyzes the relationship between the production concentration of vegetable and price asymmetric reaction of vegetable production areas.In annual January to June and October to December,some cold-resistant and easy to cultivate vegetables＇ production concentration is low,and the empirical results found that production areas prices reacts more fully or rapidly to an decrease in consumption areas prices than to a increase.In annual December to April of the following year,some thermophilic vegetables＇ production concentration is high,and the empirical results find that production areas prices reacts symmetrically to an decrease and increase in consumption areas prices.