关键词：urban growth shadow, core–periphery patterns, agriculture,transport costs,migration, 虹吸效应,中心-外围模式,交通成本,农业,人口迁徙

关键词：Rural credit,Rural areas in the Republic of China,Production decisions, 民国乡村,民间借贷,生产决策

关键词：carbon emission of foreign-invested enterprises,new development pattern,domestic cycle,international cycle,hierarchical structural decomposition analysis, 外资企业碳排放,新发展格局,国内循环,国际循环,层次式结构分解分析

关键词：fathers' parenting involvement,gender division of labor,household consumption level,high-level consumption level, 父亲育儿参与,性别分工,家庭消费水平,高层次消费水平

关键词：Carbon Inclusive Policy,Carbon Emission Reduction,SMEs,Staggered DID,Causal Forests, 碳普惠制,碳减排,中小企业 ,交错双重差分,因果森林

关键词：digital economy,human capital,innovative human capital,green product innovation,green process innovation, 数字经济,人力资本,创新型人力资本,绿色产品创新,绿色工艺创新

关键词：City-county Merger,Environmental Pollution Control,Fiscal Centralization,Haze Pollution,Differences-in-Differences, 撤县设区,污染治理,财政集权,雾霾污染,双重差分法

关键词： Smart city construction (SCC),carbon total factor productivity (CTFP),difference-in-difference (DID),machine learning PSM-DID,heterogeneity, 智慧城市,碳全要素生产率,多期DID,机器学习PSM-DID,异质性

关键词： Low-Carbon Supply Chain,Entry of Foreign Capital,Knowledge Spillover,; Capital Chain,Innovation Chain, 供应链低碳化,外资进入 ,知识溢出,资金链,创新链

关键词：national key ecological function areas,ecological transfer payment,common prosperity; difference-in-difference,difference-in-difference, 国家重点生态功能区,生态转移支付,共同富裕,双重差分