城市更新的机会成本和边际成本  

OPPORTUNITY COST AND MARGINAL COST OF URBAN REGENERATION

作　　者：刘迪[1] LIU Di

机构地区：[1]中国城市规划设计研究院上海分院

出　　处：《城市规划》2024年第5期21-29,共9页City Planning Review

摘　　要：城市更新上升为国家意志,但更新理论对“更新起点决策”和“更新终点决策”两个更新基本问题研究处于空白,对更新实践的支撑力和解释力不足。从现有更新研究中的两个误区入手,指出现有研究对更新起点和更新终点的论断与现实情况存在落差,借助微观经济学和超边际理论的分析工具,从机会成本和边际成本角度构建了“更新起点决策”和“更新终点决策”两个理论模型,通过对两个模型的拟合,形成了“起点-终点全过程决策”框架,依据该框架提出了“城市更新精明决策”思路,指出改进起点决策的“更新专业化分工”和“更新起点信贷”策略,改进终点决策的“设施触媒”和“更新底线管控”策略。为更新决策的底层逻辑分析和决策改进提供了新研究视角。While urban regeneration has risen to be the will of the nation,the research on the two basic issues of regeneration,namely,“decision-making at the starting point of regeneration”and“decision-making at the end point of regeneration”,is in a blank,with insufficient support and explanatory power for the practice of regeneration.Starting from the two misunderstandings in the existing regeneration research,this paper points out that there is a gap between the assertion of the starting point and the end point of regeneration in the existing research and the reality,and develops two theoretical models,namely,“decision-making at the starting point of regeneration”and“decision-making at the end point of regeneration”,with the help of analytical tools of microeconomics and super-marginal theory,and in the light of the opportunity cost and the marginal cost.The paper then presents a framework of“whole process decision-making from the starting point to the end point”through the fitting of these two models,based on which the thought of“smart decision-making of urban regeneration”is proposed.It further points out that the strategies of“specialized division of labor for regeneration”and“credit at the starting point of regeneration”can be improved at the starting point,and the strategies of“facility catalyst”and“bottom line control of regeneration”can be improved at the end point.The paper provides new research perspectives for the analysis of the underlying logic of regeneration decision-making and the improvement of decisionmaking.

关 键 词：城市更新 更新决策 机会成本 边际成本 更新起点 更新终点 精明更新 

分 类 号：TU984.114[建筑科学—城市规划与设计]