Kiong-kip kap su-kiû
Kiong-kip chham su-kiû sī chóng-thé keng-chè-ha̍k ê 1 ê hêng-bô͘. I beh piáu-sī ê sī kè-siàu sī án-choáⁿ chò-chiâⁿ--ê. In-ūi seng-sán-chiá kap siau-hùi-chiá hō͘-siong chih-chiap, bó͘-chi̍t-khoán ê huè-mi̍h ê kè-siàu chū-án-ne koat-tēng. Tī ka-nn̂g ê kèng-cheng (Perfect competition) ē-kha, su-kiû ê sò͘-gia̍h kap kiong-kip ê sò͘-gia̍h ē sio-kâng, sūn-soà koat-tēng kè-siàu, che tō sī keng-chè-ha̍k só͘ kóng--ê keng-chè pêⁿ-pāng (economic equilibrium).
Chit ê hêng-bô͘ siōng-chá sī Alfred Marshall thê-chhut--ê.