Baseline Models for Two‐Mode Social Network Data

Baseline models have been used in the analysis of social networks as a way to understand how empirical networks differ from “random” ones. For the purposes of social network analysis, a “random” network is one chosen—at random—from a population of possible graphs derived from a given generating function. Although these principled hypothesis tests have a long history, many of their properties and extensions to multiple data structures—here, specifically two‐mode data—have been overlooked. This article focused on applications of different baseline models to two data sets: donations and voting of the 111th U.S. Congress, and organizations involved in forums on watershed policy in San Francisco, USA. Tests using each data set, but with different baseline reference distributions, will illustrate the range of possible questions baseline models can address and the differences between them. The ability to apply different models and generate a constellation of results provides a deeper understanding of the structure of the system.     

The importance of a reliable grouping - Neutron activation analysis (NAA) data of Mycenaean pottery sherds re-evaluated with the Bonn filter method

Using the Bonn statistical procedure to form groups of samples of similar composition and hence origin, published NAA concentration data of Mycenaean pottery sherds from Mycenae and Tiryns measured in Vienna have been newly grouped and, after minor interlaboratory adjustments of a few elemental concentration values, proven to agree with well known Mycenaean patterns measured in Bonn and other laboratories. This demonstrates the importance of a good grouping procedure and also, that data from different laboratories can be used in provenance studies providing a larger reference data base.     

山东临淄山王村俑坑出土陶质彩绘颜料初步分析

2008年5月山东临淄山王村俑坑出土了数量较多的彩绘陶质文物,为了了解彩绘颜料结构和成分,采用粉末偏光显微法、剖面观察结合拉曼光谱分析对彩绘文物表面颜料样品进行分析。结果表明,这批陶质文物表面彩绘是以白灰做地仗层,由碳酸钙、白土、铁黑（Fe₃O₄）、铁红（Fe₂O₃）、朱砂等颜料调和而成,且厚度不均。在个别样品中发现了少量的中国蓝颗粒(BaCuSi₄O₁₀),这是这次分析中较为重要的发现,此分析结果也可为考古研究提供科学信息。     

Electoral rule and public sector efficiency: Some evidence from Italian municipalities

We study the effect of Law 81/1993, which introduced a different rule for the election of mayors, on the technical efficiency of Italian cities over the period 1998–2006. Since 1993, municipalities below 15,000 inhabitants vote with a single-ballot system, whereas cities above 15,000 inhabitants are subject to a double ballot. We first estimate the output-oriented technical efficiency of municipalities through data envelopment analysis, and then we perform a regression discontinuity design analysis by exploiting the exogenous change in the electoral scheme at the 15,000 inhabitants cut-off. We find evidence that municipalities voting under a double-ballot rule show lower levels of efficiency—in terms of provision of public goods—compared with cities voting under a single-ballot scheme, by about 6.5%. This effect is driven by inefficiencies registered in specific sectors, that is, police, education, and maintenance of roads. Furthermore, the overall lower efficiency of municipalities voting under runoff is related to the different level of educational attainment of elected mayors, whereas it is not driven by the features of Law 81/1993 relating to the number of lists forming a coalition in support of mayoral candidates and to disjoint votes.     

人民币升值对中国入境旅游的影响评估——基于扩展旅游引力模型的实证分析

汇率变动通过价格效应对入境旅游需求产生影响。在人民币面临较大升值压力的背景下,探讨人民币升值对中国入境旅游的影响具有重要的现实意义。本文基于标准贸易引力模型和传统旅游引力模型,构建一个扩展的旅游引力模型,采用面板数据计量方法实证分析了人民币升值对中国入境旅游发展的影响,结果表明:人民币升值给中国入境旅游发展带来了强烈的冲击,客源国的经济发展水平及其人口规模以及中国的经济发展水平与中国入境旅游发展呈正相关关系,客源国与中国的距离则是中国入境旅游发展的一个阻碍因素。     

网络话题作为定性数据来源的研究方法探讨——以旅游动机研究为例

本文对利用网络话题获取定性数据的方法、对网络话题的分类、网络话题搜集方法的使用方式和适用范围等进行了探讨。网络话题方法根据研究者参与程度的不同,可分为完全不参与型、一般参与型与强势参与型三种类型,适用于取得多样的、深刻的观点内容。本文的实证研究部分,以网络话题为样本,分析了我国旅游者的旅游动机表达。研究发现：旅游者多数从心理和情感需求角度来叙述旅游动机以及旅游对旅游者个人的影响;我国旅游者的旅游动机主要源于学习、探索、消除心理压力的需要。从网友的话题中还发现：旅游和旅行促进了某些旅游者对家与家乡的热爱,即通过外出旅游,认知了“家”的价值与意义。     

中国旅游创新与旅游经济增长关系研究——基于空间面板数据模型

本文运用空间面板数据模型,选用1998～2009年数据研究了中国省域旅游创新与旅游经济增长的关系,发现：中国省域旅游创新与旅游经济增长呈现显著空间集聚性;旅游创新不仅推动当地旅游经济的增长,还通过空间传导机制对邻近区域的旅游经济产生正向的溢出效应。说明应充分重视创新在旅游经济增长中的积极作用,通过旅游创新成果的溢出效应扩大旅游创新对旅游经济增长的作用程度和范围。     

新疆和田达玛沟佛寺遗址出土壁画颜料分析

达玛沟佛寺是新疆和田地区重要的佛教遗址,具有极高的佛教及艺术价值,对我国乃至东亚的佛教艺术都有着重要的影响。为研究新疆达玛沟佛寺遗址出土壁画颜料成分及工艺,以壁画文物残块为研究对象,利用体视显微镜、X荧光光谱仪、X射线衍射仪、拉曼光谱仪、偏光显微镜等多种仪器对其进行了分析鉴定。结果表明,达玛沟佛寺所使用的颜料全部为矿物颜料,其中蓝色颜料为青金石,绿色颜料为氯铜矿,白色颜料为石膏,红色颜料为朱砂,褐色颜料为铁红,赭黄色颜料为铁黄。该研究为探索中国西域佛教史、美术工艺史及后期修复保护材料、工艺选择提供科学依据。