关于“家电下乡”政策在实施中的问题研究

＂家电下乡＂作为我国扩大内需的一个重要措施,在实施以来产生了很大成效,但在具体操作过程中也出现了一些问题。对此,应创新工作方法,尽可能简化程序,充分体现该政策的便利性、有效性,同时加强监管与控制,防范各种因便利性而产生的副作用;加强对中标企业的管理与控制;加强宣传,避免信息不通畅引起的各种问题。     

HEDONIC PRICE INDEXES FOR RESIDENTIAL HOUSING: A SURVEY,EVALUATION AND TAXONOMY

Every house is different. It is important that house price indexes take account of these quality differences. Hedonic methods which express house prices as a function of a vector of characteristics (such as number of bedrooms and bathrooms, land area and location) are particularly useful for this purpose. I consider here some developments in the hedonic methodology, as it is applied in a housing context, that have occurred in the last three decades. A number of hedonic house price indexes are now available. However, it is often difficult to see how these indexes relate to each other. For this reason I attempt to impose some structure on the literature by developing a taxonomy of hedonic indexes, and then show how existing indexes fit into this taxonomy. Also discussed are some promising areas for future research in the hedonic field. In particular, greater use needs to be made of spatial econometric and nonparametric methods to exploit the increased availability of geospatial data. The main criticisms of the hedonic approach are evaluated and compared with those of the repeat‐sales and stratified median methods. The overall conclusion is that the advantages of the hedonic approach outweigh its disadvantages.     

Broadband speed and unemployment rates: Data and measurement issues

We examine the effects of broadband speed on county unemployment rates in the U.S. state of Tennessee. We merge the older National Broadband Map dataset and the newer FCC dataset in lengthening our broadband access data over the period 2011–2015. Extending the dataset improves the precision of the estimates. Our panel regressions control for potential selection bias and reverse causality and show that broadband speed matters: unemployment rates are about 0.26 percentage points lower in counties with high speeds compared to counties with low speeds. Ultra-high speed broadband also appears to reduce unemployment rates; however, we are unable to distinguish between the effects of high and ultra-high speed broadband. We document beneficial effects of the early adoption of high speed broadband on unemployment rates. Better quality broadband appears to have a disproportionately greater effect in rural areas.     

HANDLING NONRESPONSE IN LOGISTICS RESEARCH

Assessing and controlling for nonresponse bias is critical for the validity and reliability of survey‐based logistics research. In order to gain a better understanding of how researchers assess and report nonresponse bias in their studies, we analyzed articles published from 1998 through 2007 in three top logistics journals (International Journal of Physical Distribution and Logistics Management, Journal of Business Logistics, Transportation Journal). We describe and explore how nonresponse has been handled in these articles. Our findings show that first, survey response rates have declined over time; this influences the generalizability of survey results in case of nonresponse. Second, an average of 44% of published mail survey articles does not mention tests for detecting nonresponse bias.     

基于ARM的智能家居机器人算法设计与开发

智能家居是一个融合了通信原理、控制技术的控制系统。随着人工智能的发展,智能机器人逐渐渗透到高端智能家居生活中。主要研究嵌入式系统在智能家居控制系统中的应用,通过IAR EWARM嵌入式集成开发环境,实现基于ARM架构设计的机器人在智能家居控制系统中的基本功能,介绍软件的开发环境和具体的算法。     

Social Desirability Bias in Survey Research on Sustainable Development in Small Firms: an Exploratory Analysis of Survey Mode Effect

Survey methodology has become an increasingly popular weapon of choice in conducting research on the topic of environmental sustainability in the small firm context. However, conventional application of survey research in many empirical studies tends to ignore the inherent issues associated with the mode of administration of survey questionnaires. One of these issues is social desirability bias (SDB) arising from survey modes such as face to face, the assisted type of survey questionnaire administration and mailed or purely self‐administered survey. This study is an analysis of survey data generated by two modes: purely self‐administered and survey enumerator assisted. The paper argues that the presence of an enumerator in the workplace or actual site of the business to administer the survey will motivate the respondents to provide more accurate information about the firms' environmental sustainability knowledge and practices. The article offers suggestions to address SDB in carrying out surveys about environmental sustainability in small firms. Copyright © 2011 John Wiley & Sons, Ltd and ERP Environment.     

What you are is what you like—similarity biases in venture capitalists' evaluations of start-up teams

This paper extends recent research studying biases in venture capitalist's decision making. We contribute to this literature by analyzing biases arising from similarities between a venture capitalist and members of a venture team. We summarize the psychological foundations of such similarity effects and derive a set of hypotheses regarding the impact of similarity on the assessment of team quality. Using data from a conjoint experiment with 51 respondents, we find that venture capitalists tend to favor teams that are similar to themselves in type of training and professional experience. Our results have important implications for academics and practitioners alike.     

从贸易条件改善看技术进步的产业政策导向

技术进步与贸易条件之间存在着密切的关联,传统理论和实践往往从出口商品结构调整和提高出口品技术含量方面去研究改善贸易条件途径,却忽略了技术进步的类型与偏向性选择对贸易条件的影响。本文从开放经济条件下技术进步偏向性出发,分析不同类型技术进步对一国贸易条件产生的影响。其基本结论是,我国长期采取出口偏向型技术进步已成为我国贸易条件恶化的根本原因,并提出我国鼓励技术进步的政策应该倾向于进口偏向型的中高级技术。