中国的户籍（hukou）制度如何在改革开放后影响城乡人口流动与公共服务获取？
How has China's hukou household registration system shaped rural-urban migration and access to public services since reform?
户籍将居民绑定于出生地，并据此分配教育、医疗与社保等福利，使进城务工人员虽贡献城市经济却难享同城待遇。改革逐步放宽落户，但附着在户籍上的福利差异仍造成「半城市化」与代际不平等。
Hukou ties residents to their birthplace and allocates education, health, and social benefits accordingly, so migrant workers contribute to cities yet enjoy fewer local benefits. Reforms have eased settlement, but welfare differentials still produce half-urbanization and intergenerational inequality.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
世界银行(World Bank)《Urban China》研究报告
World Bank, Urban China reports
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780821323953 (1993)
#户籍制度 #城乡迁移 #公共服务
超大城市的「集聚经济」与「集聚不经济」如何权衡？规模收益何时逆转？
How are agglomeration economies and diseconomies balanced in megacities, and when do scale returns reverse?
集聚经济来自共享中间品、劳动力池与知识溢出，使生产率随城市规模上升；集聚不经济来自拥堵、地价与污染等成本。当边际不经济超过边际集聚收益时，城市规模收益递减甚至转为负值，出现「集聚阴影」。
Agglomeration economies from shared inputs, labor pooling, and knowledge spillovers raise productivity with city size, while diseconomies arise from congestion, land prices, and pollution. When marginal diseconomies exceed marginal agglomeration benefits, scale returns diminish or turn negative, producing an agglomeration shadow.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
Fujita, Krugman & Venables,《The Spatial Economy: Cities, Regions, and International Trade》(MIT Press, 1999)
Fujita, Krugman & Venables, The Spatial Economy: Cities, Regions, and International Trade (MIT Press, 1999)
独立核验依据 · Independent verification: 核验依据 1 ISBN 9780262303606 (1999)
#集聚经济 #城市化 #规模收益
人口红利窗口期关闭后，经济体通常会面临哪些结构性挑战？
What structural challenges typically follow the closing of a demographic dividend window?
当抚养比因老龄化回升，劳动年龄人口占比下降，储蓄率与投资率往往走低，潜在增长率承压。若未提前建立普惠养老金与提高女性及老年劳动参与率，养老负担将转嫁财政并抑制消费。
As the dependency ratio rises with aging and the working-age share falls, savings and investment rates tend to drop, pressuring potential growth. Without prepaid universal pensions and higher female and elderly participation, the old-age burden shifts to public finances and dampens consumption.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
联合国人口司(UN Population Division)《World Population Ageing》
UN Population Division, World Population Ageing
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789210510929 (2002)
#人口红利 #老龄化 #抚养比
解释人口迁移的「推-拉」理论是什么？请举例说明。
What is the push-pull theory of migration, and can you give an example?
推-拉理论由李（E.S. Lee）系统阐述，认为迁出地的「推力」（如贫困、冲突）与迁入地的「拉力」（如就业、教育）共同驱动迁移，中间障碍与个体因素调节流向。例如农村收入低（推）与城市工厂缺工（拉）共同促成农民工进城。
Systematized by E.S. Lee, push-pull theory holds that push factors at origin and pull factors at destination jointly drive migration, modulated by intervening obstacles and personal factors. For example, low rural income plus urban labor demand drives rural-to-city movement.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
联合国《World Migration Report》
UN, World Migration Report
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.18356/9789292680763：World Migration Repor
#人口迁移 #推拉理论 #城镇化
什么是「精明增长」（smart growth）？它如何缓解城市蔓延？
What is smart growth, and how does it curb urban sprawl?
精明增长是一套紧凑、混合用途、公交导向且保护开敞空间的城市规划策略。它通过提高密度与可步行性降低对小汽车的依赖和基础设施延伸成本，从而抑制无序扩张。
Smart growth is a planning approach favoring compact, mixed-use, transit-oriented development that protects open space. By raising density and walkability, it reduces car dependence and the cost of extending infrastructure, curbing disorderly expansion.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#精明增长 #紧凑城市 #城市规划
什么是人口转变（demographic transition）？通常分为哪几个阶段？
What is demographic transition, and what stages does it usually comprise?
人口转变描述从「高出生高死亡」向「低出生低死亡」的长期演进，经典四阶段为：高稳态、死亡率下降、出生率下降、低稳态。部分国家进入「第五阶段」——低生育叠加老龄化导致人口负增长。
Demographic transition describes the long shift from high birth and death rates to low ones, classically in four stages: high equilibrium, falling mortality, falling fertility, and low equilibrium. Some countries enter a fifth stage of population decline as low fertility meets aging.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
联合国《World Population Prospects》方法论
UN, World Population Prospects methodology
#人口转变 #生育率 #死亡率
什么是城市蔓延（urban sprawl）？它通常带来哪些经济与社会问题？
What is urban sprawl, and what economic and social problems does it typically bring?
城市蔓延指低密度、依赖小汽车、跳跃式向外扩张的城市形态。它推高基础设施与通勤成本、加剧碳排放与耕地占用，并常伴随中心区衰败与社会空间隔离。
Urban sprawl is low-density, car-dependent, leapfrog outward expansion of cities. It raises infrastructure and commuting costs, increases emissions and farmland loss, and often accompanies inner-city decline and socio-spatial segregation.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
经济合作与发展组织(OECD)《Compact City Policies: A Comparative Assessment》(2012)
OECD, Compact City Policies: A Comparative Assessment (2012)
#城市蔓延 #土地利用 #通勤
国际上通常用什么标准界定「老龄化社会」？
What standard do international agencies use to define an aging society?
联合国通常把 65 岁及以上人口占总人口 7% 以上称为老龄化社会，14% 为老龄社会，20% 为超老龄社会。该指标用于监测人口结构转变对养老与医疗体系的压力。
The UN generally labels a society aging when those aged 65 and over exceed 7% of the population, aged at 14%, and super-aged at 20%. The thresholds track how demographic shift strains pension and health systems.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-10-04
来源 · Source
联合国《World Population Ageing》报告
UN, World Population Ageing report
独立核验依据 · Independent verification: 核验依据 1 ISBN 9789210510929 (2002)
#老龄化 #人口结构 #联合国标准