城镇水价收费制度研究

基于调研数据,对影响城镇水价收费制度改革的诸多因素进行了order probit模型的计量分析。研究发现,居民水费支出、收入水平和住房面积等因素,对收费制度改革具有显著的影响关系,而环保宣传、地区因素和居民个体特征因素的影响关系不显著。在此基础上,提出了城镇水价收费制度改革的对策建议。     

Cooperative membership and farmers’ choice of marketing channels – Evidence from apple farmers in Shaanxi and Shandong Provinces,China

Cooperatives are established to improve farmers' production conditions, to increase their bargaining power and to enable them to benefit from modern value chains. In China, farmers are members of a cooperative for multiple reasons. Little is known on whether and how cooperative membership affects farmers’ choice of marketing channels. This paper examines determinants of farmers’ choice of marketing channels, especially how cooperative membership impacts upon this choice. Our analysis is based on survey data collected in 2015 among 625 apple growing farm households in the provinces Shaanxi and Shandong. We employ endogenous switching probit models to deal with potential endogeneity of membership in estimating the determinants of marketing channel choices. We find that cooperative membership has a positive impact on selling to wholesalers and a negative impact on selling to small dealers, but no significant impact on selling to the cooperative itself. As products sold through cooperatives generally comply with relatively stringent food quality and safety standards, these results imply that policies promoting cooperative members to sell their products through cooperatives are likely to have a significant impact on food quality and food safety in China.     

北京流动儿童义务教育设施的空间不均衡研究——以丰台区为例

以北京以及丰台区的适龄流动儿童分布和公立小学分布数据为例,采取社会地理学空间匹配的分析方法来测度流动儿童接受义务教育的空间不均衡性。结果显示,无论在市域、城区还是街道尺度,流动儿童就学需求和教育资源供给之间的空间不均衡现象都存在。据此,建议在学区划定时不仅要考虑常住户籍家庭儿童的数量,也要考虑校区吸引流动儿童的数量,并在流动人口集中的城乡结合地带,应尽量增设新的教育设施;或在现有教育资源的情况下,借助集体通勤方式提高这些教育设施的可达性,使更多的流动儿童得到就近接受义务教育机会。     

Intra-metropolitan shifts in labor demand and the adjustment of local markets

I offer new evidence on the adjustment of local labor markets to geographic shifts in labor demand within US metropolitan areas using a unique data set in which metropolitan subregions are geographically matched across the 1970–1980 and 1980–1990 decades. The evidence uncovered paints the following picture. Workers, especially those with less education, make incomplete adjustments within metropolitan areas in response to intra-metropolitan demand shifts. Although blacks may not make especially limited adjustments, they have disproportionately suffered deleterious effects from job movements because the demand shifts have tended to be away from their places of residence.     

北京市办公业的空间格局演变及其模式研究

通过对北京城市写字楼2009年调研数据的空间统计,研究北京市办公业的空间格局演变及其模式.研究发现:北京市写字楼总体呈现集聚的空间分布模式,分布重心向北倾斜明显,主要分布方向为"西北-东南",空间离散程度逐渐加大,显有逐渐向近郊及远郊推进的趋势.同时,北京市写字楼的空间分布经历了分散-集中-再分散的过程,"西北-东南"向的空间格局标示着北京城市办公功能空间布局的主导方向;其演变模式先后经历了离散-极化-扩散-稳定四个发展阶段.未来一段时间内,在中心城区内部已形成的办公集聚区的空间承载量有限的情况下,办公活动将向外扩展,办公活动郊区化将对缓解中心城区高度集聚、平衡城区与郊区发展不平衡的矛盾和优化城市功能空间分布起到积极作用.