Comparative statics

Japanese: 比較静学 - ひかくせいがく（英語表記）comparative statics

When consumer tastes, asset amounts, production technology, etc. are constant, the demand function (curve) and supply function (curve) for each good are derived from the rational maximizing behavior of individuals. The basic idea of equilibrium theory is that the price and trading volume (production volume = consumption volume) are determined so that the values of the demand function and supply function in the market are equal, and that this state is maintained as long as there are no changes in the external conditions (given conditions) that are considered constant. However, changes in the given conditions generally affect the equilibrium values (production volume, consumption volume, price).

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

消費者の嗜好や資産の量，生産技術等を一定とするとき，個人の合理的な最大化行動から各財に対する需要関数(曲線)と供給関数(曲線)が導かれる。そして市場における需要関数と供給関数の値が一致するように価格と取引量(生産量＝消費量)が定まり，その状態は一定とされた外的条件(与件)に変化がないかぎり維持されるというのが均衡理論の基礎となる考えである。　しかし与件の変化は一般に均衡値(生産量，消費量，価格)に影響を及ぼす。

出典　株式会社平凡社世界大百科事典第２版について　情報

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