城市犯罪中的非公共空间盲区及其综合治理

城市犯罪中的空间盲区是形成犯罪载体的重要因素。本文在阐明城市犯罪空间盲区的产生机制及其综合治理的任务的基础上,重点分析了非公共空间盲区的防控脆弱性及其外在、内在的防控盲点,提出了治理此类盲区的工作思路,讨论了治理非公共空间盲区的外部环境和内部环境以及提高非公共空间警戒能力的工作途径。成功的综合治理可以对有效地预防犯罪、中止犯罪、制伏罪犯、消减犯罪危害性等起到积极作用,可以为城市犯罪的空间防控作出积极贡献。     

DEVELOPMENT POLICIES,URBAN UNEMPLOYMENT AND DEFORESTATION: THE ROLE OF INFRASTRUCTURE AND TAX POLICY IN A TWO-SECTOR MODEL*

ABSTRACT. We model an economy of a developing country that produces an exportable manufactured good in an urban sector and a nontradable rural good. Manufacturing faces a fixed wage, which encourages urban unemployment. Changes in cultivated area in the rural sector involve deforestation or reforestation at frontiers. Government taxes to pay for urban infrastructure that assists the manufacturing sector. Increases in urban infrastructure may relieve or exacerbate frontier deforestation but expands manufacturing employment and reduces urban unemployment. Rural transportation improvements exacerbate frontier deforestation but expand employment in the urban manufacturing sector. A larger population, ceteris paribus, widens the rural-urban wage gap and exacerbates deforestation, but may cause manufacturing employment to expand or contract.     

THE POLICY PROCESS AND ORGANIZATIONAL FORM

In this paper the transactions cost approach (TCA) is used to define organizations and to predict their forms under certain conditions. Next, Aaron Wildavsky's approach is used to define the policy process and to predict its form in particular organizations. Two assertions follow: namely, that the most efficient organizational form may be predicted from knowledge of underlying transactions costs, and that the form of the policy process in an organization can be predicted from knowledge of the organization's form (regardless of whether it is the most efficient form). Recent natural gas policy in the U.S.A. is used to illustrate these propositions, and several conclusions are offered about 1) the potential applicability of the TCA to the public sector and to the policy process and 2) about the potential applicability of Wildavsky's version of the policy process to differing organizational forms.     

SPECIAL INTERESTS AND THE POLICY PROCESS

Books reviewed in this article:
Jeffrey M. Berry, Feeding Hungry People: Rulemaking in the Food Stamp Program
Peter Navarro, The Policy Game: How Special Interests and Ideologues are Stealing America
Richard K. Scotch, From Good Will to Civil Rights: Transforming Federal Disability Policy
Paul Y. Watanabe, Ethnic Groups, Congress, and American Foreign Policy: The Politics of the Turkish Arms Embargo     

PROBLEMS IN POLICY ANALYSIS AND URBAN GOVERNMENT

Malcolm C. Getz, The Economics of the Urban Fire Department
Robert K. Yin, Changing Urban Bureaucracies
Pietro S. Nivola, The Urban Service Problem     

RURAL–URBAN MIGRATION AND UNEMPLOYMENT: THEORY AND POLICY IMPLICATIONS*

ABSTRACT We develop a regional model where, in the city, unemployment prevails because of too high (efficiency) wages, while, in the rural area, workers are paid at their marginal productivity. We characterize the steady‐state equilibrium and show that it is unique. We then consider two policies: decreasing urban unemployment benefits and subsidizing urban employment. We find that decreasing the unemployment benefit in the city creates urban jobs and reduces rural–urban migration since new migrants have to spend some time unemployed before they can find a job in the city. On the other hand, raising employment subsidies increases urban employment but may also increase urban unemployment because it triggers more rural–urban migration. In this respect, the employment subsidy policy can backfire by raising rather than reducing urban unemployment.     

城市空间环境对城市犯罪的影响

城市空间环境的基本属性是影响城市犯罪的重要的空间因子。本文全面分析了城市空间环境的分异格局、布局形态、相互作用等基本属性的空间显现形式,系统论述了这些属性对城市犯罪种类、犯罪率、犯罪要素的直接与间接影响。     

城市犯罪风险区位因子与风险地形分析——以武汉市主城区为例

从犯罪背景空间、场所空间、联接空间和聚集空间四个层次,构建城市犯罪风险区位因子体系。以武汉市主城区为研究区域,以立案判决的“两抢一盗”犯罪为数据源,综合运用空间句法、犯罪近重复分析和地理加权回归模型方法进行犯罪风险地形建模实证研究。结果表明,犯罪风险区位因子对犯罪空间分布的影响具有显著的空间异质性;依据多层次的犯罪风险区位因子体系及其对犯罪行为的影响机制,城市犯罪高风险区域可分为城市商业中心、火车站交通枢纽、城中村和城乡结合部等几大类型。基于犯罪地理学理论构建的犯罪风险区位因子体系模拟的犯罪风险地形对实际犯罪空间分布有良好的解释度,可为城市犯罪分布环境形成机制的研究提供相关借鉴。     

IMMIGRANT ENCLAVES AND CRIME*

ABSTRACT We study the link between neighborhood immigrant concentration and crime in England. Over previous decades there has been a significant increase in the number of immigrant enclaves, where immigrants account for a substantial fraction of the local population. Using both recorded crime and self‐reported crime victimization data, we find that crime is significantly lower in those neighborhoods with sizeable immigrant population shares. The effect is nonlinear and only becomes significant in enclaves. The crime reducing effect is substantially enhanced if the enclave is composed of immigrants from the same ethnic background. We discuss some possible mechanisms for the results we observe.