我国城市的生产率增长、效率改进与技术进步

基于Malmquist指数分析方法,本文测度了我国城市的生产率增长、效率改进与技术进步。研究发现,自20世纪90年代末期以来,我国城市生产率的增长率持续下降,并连续多年出现负值,导致生产率水平下降,而这主要是由技术水平下降所致,但城市效率水平同期却有了较为明显的改进。地级市的平均Malmquist指数及效率改进指数,要高于省会及副省级以上城市,在一定程度上出现了向后者的趋同;西部城市的生产率增长率与东部城市存在较大差异,生产率水平的差距有扩大的趋势。     

Shrinking Cities,Shrinking Households,or Both?

Household size decline accounts for a substantial portion of population loss in shrinking cities, yet little research has focused on it. Much of the literature presents a simple growth/decline binary that is largely determined via population figures. In this paper, we highlight the importance and assess the impact of household size changes on population decline, and determine what types of household size declines are more acute in shrinking cities than other locales. We find that elderly households and households with school-aged children are under-represented in shrinking cities, while households with pre-school-aged children are over-represented. More tellingly, we find the biggest source of household-related loss in shrinking cities to be the growth of single-person households now living in houses that were once home to entire families. These findings puncture the binary on which much of the shrinking cities discourse is based. The population dynamics of most cities are subtler than either practitioners or critical scholars assert. We argue that plans and development strategies for shrinking cities should reflect a range of demographic changes, including outmigration and internal household restructuring.     

The size distribution of Chinese cities

This paper uses urban data to investigate two important issues regarding city sizes in China, the relative growth of cities and the nature of the city size distribution. The manner in which cities of different sizes grow relative to each other is examined and, contrary to the common empirical finding that the relative size and rank of cities remains stable over time, it is found that the Economic Reforms and the One Child Policy since 1979 have delivered significant structural change in the Chinese urban system. The city size distribution remains stable before the reforms but exhibits a convergent growth pattern in the post-reform period. The theoretical literature on city sizes highlights a link between log normal and Pareto distributions for city sizes prompting the employment of Pearson goodness-of-fit tests to examine directly which theoretical distribution provides the best approximation to the empirical city size distribution. Contrary to the evidence for other countries, a log normal rather than Pareto specification turns out to be the preferred distribution.     

绿色城市:城市发展与环境的动态关系

不久的将来,世界上大多数的人都将在商业化的城市中生活和工作。数十亿人的生活质量将取决于自由市场经济的发展与绿色城市的关系。有的城市在增长时环境会恶化,而有的城市却可以保护甚至提高环境的质量,这个问题得到了众多研究者来自不同角度的关注。论文在大量文献与数据的基础上探讨了城市发展与环境之间的动态关系,介绍了经典的环境库兹涅茨曲线假说,并从人口增长、城市空间蔓延以及外部性等方面对环境库兹涅茨曲线假说进行了补充与完善。     

A Dynamic Approach to Population Change in Central Cities and Their Suburbs, 1980–1990

A bstract .   With the growing concern over the causal relationship between crime and population change, this study readdresses the importance of economic organization in studying population change in a metropolitan area. This study investigates the dynamic influences of internal and external factors on population change in either central cities or their suburbs. The units of analysis in this study are the 142 U.S. central cities and their suburban rings of Metropolitan Statistical Areas (MSAs) in 1980 and 1990. Two change models (semi-difference and mixed-difference models) are used to predict population change. The results demonstrate that population change in one territory of a metropolitan area is affected by crime and employment opportunity in both locations of a metropolitan area.     

二代优先:当前城市户籍政策调整的一种思路

城市户籍政策调整对于统筹城乡发展、促进社会和谐有着至关重要的战略意义.本文在充分剖析当前户籍制度改革困境的基础上,提出了“二代优先”的户籍政策调整新思路,即允许流动人口子女先于父母双方获得城市常住户口,其基本前提是其父母已经在该城市就业、居住达到一定的年限.这一政策可以较好地与现有落户政策衔接,具有较高的可行性,并且有...     

The distribution of real estate value changes: Metropolitan Boston, 1870–1970

This paper presents estimates of land value change and other measures of real estate value change for the Boston area's 78 towns and cities over the past 100 years. A flattening of the real estate value gradient over time is demonstrated. Given the pattern of land ownership in the Boston area, a higher rate of value increases at greater distances from the center is shown to imply a regressive distribution of capital gains with respect to wealth among the homeowner population. Returns to homeowning are compared with returns to alternative business assets indicating some possible factors in the persistence of wealth inequality.     

A theoretical relationship between the rank-size rule and Clark's law of urban population distribution: Duality in the rank-size rule

This paper theoretically shows the necessary and sufficient conditions for the robust rank-size rule: the rank-size rule that robustly holds for any choice of threshold urban population density by which populations of cities are determined. First, it is shown that when urban population distribution follows Clark's law, the robust rank-size rule holds if and only if the gradient parameter of the negative exponential distribution of the ith ranked city as √i times as large as that of the first ranked city and the population density at the center is the same for all cities. Second, when urban population distribution follows a certain general class of urban population distribution functions, the robust rank-size rule (of population) holds if and only if the boundary condition is satisfied and the rank-size rule holds with respect to urban areas. These two rank-size rules, the rank-size rule of population and the rank-size rule of urban areas, form the primal-dual relation. Third, if the robust rank-size rule holds, then the constant density rule holds, that is, the average population density of a city over its urban area is the same for all cities.     

湖北省人口收缩城市的空间格局与类型识别

通过对湖北省82个县(市、区)的常住人口变化率和人口净流量进行交互分析,引入城乡建设用地脱钩模型和人口—土地城镇化协调指数,分析了人口收缩区域建设用地结构和城镇化协调类型。结果显示,湖北省存在37个人口持续流出、规模减少的区域,这些区域不仅在总量上表现为人口收缩与建设用地扩张的悖论关系,而且在城镇化方面也多表现为人口城镇化与土地城镇化不协调的状态,而从城乡建设用地结构的角度表现为不同的脱钩类型,其中仅有少数收缩区域是强脱钩的合理利用状态。从不同表现特征可将收缩城市类型分为空间无序扩张型、工业衰退型、资源枯竭型以及中心袭夺型四个类别,并概括为人口资源与土地资源、经济发展等在时空上的不匹配。最后,结合资源禀赋、经济结构变化等特征对人口收缩区域类别进行了归纳,并提出了针对性的城市规划和发展建议。     

Decentralization is Dead,Long Live Decentralization! Capital City Reform and Political Rights in Kampala,Uganda

African cities are currently experiencing some of the highest population growth rates in the world. Accompanying this growth is constant and continuing pressure on national and local governments to develop political and institutional structures that respond to the multiple demands this demographic change provokes in relation to service delivery, economic development and social wellbeing. In response to these challenges, national governments are reviewing the political and administrative structures of their capital cities, sometimes recentralizing authority. This article examines the reforms to Kampala, capital city of Uganda. The article explains how the national government gradually created the legal conditions necessary to take over the capital city directly, and the political rhetoric and conflict that ensued. We argue that while Kampala had deep internal problems and fared poorly in service delivery, matters were exacerbated by the national government's historical indifference to the city. Moreover, past service delivery failures offered an easy rationale for recentralizing authority. We demonstrate that this recentralization was a well‐planned effort by the central government to regain political control of the capital city. This article illustrates how the national government's recentralization of authority in Kampala is a significant departure from its longstanding policy of democratic decentralization.     

The shrinking mining city: urban dynamics and contested territory

Shrinking mining cities — once prosperous settlements servicing a mining site or a system of mining sites — are characterized by long-term population and/or economic decline. Many of these towns experience periods of growth and shrinkage, mirroring the ebbs and flows of international mineral markets which determine the fortunes of the dominant mining corporation upon which each of these towns heavily depends. This dependence on one main industry produces a parallel development in the fluctuations of both workforce and population. Thus, the strategies of the main company in these towns can, to a great extent, determine future developments and have a great impact on urban management plans. Climate conditions, knowledge, education and health services, as well as transportation links, are important factors that have impacted on lifestyles in mining cities, but it is the parallel development with the private sector operators (often a single corporation) that constitutes the distinctive feature of these cities and that ultimately defines their shrinkage. This article discusses shrinking mining cities in capitalist economies, the factors underpinning their development, and some of the planning and community challenges faced by these cities in Australia, Canada, Japan and Mexico.     

低碳城市建设的项目管理路径研究

随着我国城镇化率的提高和城市人口的增加,低碳城市建设的任务变得越来越紧迫和重要.由于传统的城市建设管理体制和模式的局限,低碳城市建设战略目标受到多方面的影响和制约,效果并不理想.项目管理作为战略执行的方法体系,能够实现资源集约化开发与利用,提供低碳城市建设的驱动力.低碳城市建设可视作一个复杂项目,本文应用项目管理方法构...     

Do We Still Need Cities? Evidence on Rates of Innovation from Count Data Models of Metropolitan Statistical Area Patents

Evidence of the importance of urban agglomeration and the offsetting effects of congestion are provided in a number of studies of productivity and wages. Little attention has been paid to this evidence in the economic growth literature, where the recent focus is on technological change. We extend the idea of agglomeration and congestion effects to the area of innovation by empirically looking for a nonlinear link between population density and patent activity. A panel data set consisting of observations on 302 USA metropolitan statistical areas (MSAs) over a 10-year period from 1990 to 1999 is utilized. Following the patent and R&D literature, models that account for the discreet nature of the dependent variable are employed. Strong evidence is found that agglomeration and congestion are important in explaining the vast differences in patent rates across US cities. The most important reason cities continue to exist, given the dramatic drop in transportation costs for physical goods over the last century, is probably related to the forces of agglomeration as they apply to knowledge spillovers. Therefore, the empirical investigation proposed here is an important part of understanding the viability of urban areas in the future.     

APPLYING NORTH'S LAWS OF MOTION TO THE EDGE OF THE WEST

This paper uses Douglass North's theories of institutional economics to explain progress in Muslim Spain. It argues that it was efficient economic institutions in the guise of a free-market economy where the property rights of different strata of society were well protected, which ensured lasting prosperity. This paper postulates that while a population explosion could have been responsible for the initial growth in Spain, it was an efficient formal–informal institutional matrix that ensured a high level of long-term growth.     

Evaluating the transformation of China's resource-based cities: An integrated sequential weight and TOPSIS approach

The transformation and development is an inevitable problem for resource-based cities (RBCs). In the process of transformation, cities in various cities, regions, resource types and development stages are having shown commonality and uniqueness. However, little work has been done on the horizontal comparison between RBCs. This paper evaluates the transformation level of 81 RBCs in China from 2006 to 2017 and investigates the transformation effect of cities in different regions, different dominant resources and different development stages. The comprehensive index system incorporating economy, society and environment is established by using the improved TOPSIS method. The results indicate that the transformation effects of most RBCs are between 0.400 and 0.800. Generally speaking, the transformation effects of four economic regions are on the rise, especially in the western region, with an increase of 17.626% from 2006 to 2015. The transformation effect of RBCs in the eastern region is the highest, while that in the northeast is the worst. Regeneration cities’ transformation effect is the best, reaching more than 0.70 in 2017. The transformation effect of growth cities is the worst, but the growth rate is the highest from 2006 to 2015. There is a rising trend of the transformation effects for oil-based cities and coal-based cities, while the transformation effects of iron-oriented cities and rare earth-oriented cities are not obvious.     

Aspects of growth in a system of cities

This paper explores and develops the modeling of growth in a system of cities in two alternative settings. First, we examine a large growing economy with a fully developed system of cities with perfectly malleable private and public capital. Local scale economies in production and diseconomies in consumption in equilibrium offset each other at the margin so that from a national point of view we have a constant returns to scale economy. We show that at the steady state the number of cities grows exponentially at the rate of growth of the population. We then examine the impact of technological change, considering a case where public capital is not perfectly malleable. In the second setting, we consider the problem of growth for a small economy and discuss problems associated with the transition to the steady state. We modify the previous model to describe a system of cities that is just starting to develop. Investment in public infrastructure capital is subject to sharp indivisibilities and as a result new cities are built at discrete points in time.     

The Effects of local Fair Housing Ordinances on Housing Segregation: Their Impact Is Small, But It's an Important Positive Change Toward Integration

Abstract . State and local fair housing ordinances, patterned after federal legislation, are promoted by federal policy. This study investigates whether these local laws have had any effect on levels of residential segregation between Whites and Blacks, 1970-1980, by comparing changes in segregation for 111 cities characterized by different types of fair housing coverage. Results show average declines of 9 points in the index of dissimilarity, with cities covered by both state and local laws declining slightly more than cities with no fair housing coverage. Declines are not greater in cities with laws that are “substantially equivalent” to Title VIII vs. cities with non-equivalent laws. When changes in segregation were examined by a variety of population, economic and housing variables that may affect segregation change, it was found that local ordinances continue to have a small, but statistically significant effect. This effect varies according to the pattern of segregation change under study; deconcentration of ghetto areas and integration of White areas are not affected by type of local fair housing coverage.     

Regional growth and interstate migration

The current study examines a simultaneous equation model of interstate migration using income growth, employment growth, unemployment growth, population growth, gross migration, and employment in manufacturing as endogenous variables. The results show that neither the growth of employment nor the growth of income in the destination location has been directly important determinants of migration flow. However, an indirect effect through the population variable can be discerned for these variables, and this has important policy implications. A key feature of this migration model is that it incorporates most of the determinant factors as rates of change over time. The study sheds light on the joint and indirect effects of migration and other endogenous variables and draws some important policy implications pertaining to growth.     

An Empirical Model of Land Use Change in China

The aim of this paper is to develop an empirical model of land use change that integrates the growth of regional economy and land use change in a developing country such as China. The concept of ecological growth in terms of regional resources and population is introduced to make an empirical model of land use changes. It is shown that the model might be an efficient tool to analyze and predict regional land use change, and that the policies based on it can play an important role in land use change in China.     

How efficiently do U.S. cities manage roadway congestion?

We estimate efficiency and TFP growth for two measures of congestion and two measures of the monetary value of congestion for the largest 88 contiguous cities in the U.S. over the period 1982–2007. Using stochastic frontier analysis we find that the efficiency scores for congestion and the associated ranking of cities is sensitive to the measure of congestion. In contrast, the efficiency scores and rankings are robust for the two measures of the monetary value of congestion. Most importantly, for the most valid measure of congestion and both measures of the monetary value of congestion, we find that average TFP growth over the study period is characterized by an upward trend. This is an encouraging sign even though in all three cases growth is only zero or slightly less than zero at the end of the study period. We therefore conclude that policies which have been used towards the end of the study period such as providing incentives to carpool and encouraging employers to offer flexi-time and telecommuting arrangements appear to have been effective and should be implemented more widely.