Predictive crime mapping

Geographic Information Systems (GIS) have emerged as a key tool in intelligence-led policing and spatial predictions of crime are being used by many police services to reduce crime. Break and entries (BNEs) are one of the most patterned and predictable crime types, and may be particularly amendable to predictive crime mapping. A pilot project was conducted to spatially predict BNEs and property crime in Vancouver, Canada. Using detailed data collected by the Vancouver Police Department on where and when observed crimes occur, the statistical model was able to predict future BNEs for residential and commercial locations. Ideally implemented within a mobile GIS, the automated model provides continually updated predictive maps and may assist patrol units in self-deployment decisions. Future research is required to overcome computational and statistical limitations, and to preform model validation.     

政府信息公开中“内部管理信息”的判定

内部管理信息不予公开在国务院办公厅《关于做好政府信息依申请公开工作的意见》中进行规定后,法院通过个案对如何判定内部管理信息进行了回应。通过判决梳理,可见法官在审查时关注到内部管理信息的主体、内容、程序和效力四个方面;其中"不具备外部效力"作为效力标准是法院判定内部管理信息的主要考察因素。然而针对现行规范的梳理却显示出不同的结论,信息所涉内容的"内部性"方是内部管理信息的核心,即在行政机关"履行职责"之外,属于"日常工作"中的内部管理事务;同时部门、地方性信息公开规范通过列举式规定,将人事信息、设备管理信息、内部规章制度列为内部管理信息的典型类别。以"内部性事务"作为内容标准判定内部管理信息相较于"不具备外部效力"作为效力标准而言,更符合立法原意且契合已有的规范体系。     

IDENTIFYING MECHANISMS BEHIND POLICY INTERVENTIONS VIA CAUSAL MEDIATION ANALYSIS

Causal analysis in program evaluation has primarily focused on the question about whether or not a program, or package of policies, has an impact on the targeted outcome of interest. However, it is often of scientific and practical importance to also explain why such impacts occur. In this paper, we introduce causal mediation analysis, a statistical framework for analyzing causal mechanisms that has become increasingly popular in social and medical sciences in recent years. The framework enables us to show exactly what assumptions are sufficient for identifying causal mediation effects for the mechanisms of interest, derive a general algorithm for estimating such mechanism‐specific effects, and formulate a sensitivity analysis for the violation of those identification assumptions. We also discuss an extension of the framework to analyze causal mechanisms in the presence of treatment noncompliance, a common problem in randomized evaluation studies. The methods are illustrated via applications to two intervention studies on pre‐school classes and job‐training workshops.     

Candidate ballot information and election outcomes: the Czech case

This study measures the importance of candidate characteristics listed on ballots for a candidate's position on a slate, for preferential votes received by a candidate, and, ultimately, for getting elected. We focus on the effects of gender, various types of academic titles, and also several novel properties of candidates' names. Using data on over 200,000 candidates competing in recent Czech municipal board and regional legislature elections, and conditioning on slate fixed effects, we find that ballot cues play a stronger role in small municipalities than in large cities and regions, despite the general agreement on higher candidate salience in small municipalities. We also quantify the electoral advantage of a slate being randomly listed first on a ballot.     

A Deeper Look at the Relationship between Political Knowledge and Political Participation: Evidence from Presidential and Legislative Elections in Taiwan

This study examines the effects of political knowledge on various types of political participation by focusing on five recent presidential and legislative elections in Taiwan. The empirical findings indicate that political knowledge has positive effects on some types of political participation but the effects of political knowledge on different types of political participation vary by the types of electoral systems and elections. Besides, although the interviewer's assessment of the respondent's level of information has been widely used as an effective indicator of political knowledge, this study shows that the interviewers tend to rate men and partisans as politically knowledgeable, which might lead to a biased estimate of political knowledge. Overall, this study provides insight into the relationship between political knowledge and political participation in Taiwan.     

Why bother campaigning? Campaign effectiveness in the 2009 European Parliament elections

This paper explores the effectiveness of European Parliament candidates' campaigns. We analyze the relationship between candidates' spending and their likelihood of success, controlling for a range of relevant co-varying factors. We then investigate whether the effects of electoral spending are conditioned by two variables: ballot design and incumbency. We find that, ceteris paribus, spending was positively related to a candidate's likelihood of electoral success in the 2009 campaign, though this effect is small in scale. We also reveal that the electorally positive effects of spending are observable across both 'party-centered' and ‘candidate-centered’ ballot structures, and that there is some evidence that incumbent spending is less effective than challenger spending.     

Individual level dynamics of PTV change across the electoral cycle

Propensity-to-vote (PTV) scores are ever more commonly used in electoral research as a measure of electoral utilities. Yet a growing literature employs them as dependent variable in the voting equation in place of the lower information granted by vote recall questions. However, this choice can be seen as problematic because of the very structure of election survey research. To the extent that voters' PTVs are measured in post-election surveys (as it is often the case) these are likely to result endogenously produced by actual voting behavior in the past election – thus partly undermining the validity of the PTV question which, ideally, should not be related to any specific election. In this paper, we try to disentangle the relationship between short-term political attitudes (leader evaluations, issue proximity, economic assessments) and voters' changing patterns of propensities to vote in both an electoral and a non-electoral context. The latter scenario serves as a means to rule out the potentially contaminating effect of voting choices on voters' PTVs. The data comes from two panel surveys of Italian voters conducted by ITANES in occasion of the 2006 general election, and in 2011 (that is, in a non-electoral year) respectively.     

Elite Messages and Source Cues: Moving Beyond Partisanship

According to previous studies, women in the U.S. Congress are often cast by the media and by voters as quite distinct from men, with a unique focus on women's issues and an outsider approach to governing. Contrary to the media's depiction and voters' expectations, however, an analysis of Congressional web sites reveals that women members, just as men in Congress do, portray themselves as having diverse interests and participating zealously in the Washington power struggle. Thus, women's self-presentations on the web do not support the notion that the images proffered by members contribute to media and voter stereotypes of women representatives.     

Image formation,the low involvement viewer,and televised political advertising

Political observers have extensively documented the national media's focus on committee and party leaders. Legislators' local coverage, in contrast, remains largely unexplored and unexplained. This article examines 40 local newspapers to explore how these factors may influence legislators' local newspaper coverage. We find that local newspapers do not provide more coverage to congressional leaders and that independent papers write more frequently than chain-owned competitors about the local House delegation. Additionally, the extent to which a legislator's district geographically overlaps with the newspaper's market has a strong effect on legislators' mentions.     

The Benefits of Experimental Methods for the Study of Campaign Effects

Researchers rely heavily on observational designs to study the effects of political campaigns. In doing so, scholars often overlook serious threats to causal inference that bedevil their research designs. The strategic nature of campaigns leads to serious selection biases in voter exposure to campaign stimuli and, ultimately, generates biased estimates of campaign effects. Standard approaches to establishing causal effects in observational research, such as the collection of panel data and the inclusion of covariates, are often inadequate. In contrast, experimental approaches offer researchers a more promising way to estimate accurately the causal effects of campaigns. In this essay, I discuss the recent renaissance of experimental research in the study of campaigns and illustrate how scholars can use lab, field, and survey experiments to good effect. When experimental methods are not feasible, studies of campaign effects would benefit from paying better attention to the causal identification strategy. In closing, I discuss how the logic of experimentation can be applied to some observational settings.