Three conditions under which experiments and observational studies produce comparable causal estimates: New findings from within‐study comparisons

This paper analyzes 12 recent within‐study comparisons contrasting causal estimates from a randomized experiment with those from an observational study sharing the same treatment group. The aim is to test whether different causal estimates result when a counterfactual group is formed, either with or without random assignment, and when statistical adjustments for selection are made in the group from which random assignment is absent. We identify three studies comparing experiments and regression‐discontinuity (RD) studies. They produce quite comparable causal estimates at points around the RD cutoff. We identify three other studies where the quasi‐experiment involves careful intact group matching on the pretest. Despite the logical possibility of hidden bias in this instance, all three cases also reproduce their experimental estimates, especially if the match is geographically local. We then identify two studies where the treatment and nonrandomized comparison groups manifestly differ at pretest but where the selection process into treatment is completely or very plausibly known. Here too, experimental results are recreated. Two of the remaining studies result in correspondent experimental and nonexperimental results under some circumstances but not others, while two others produce different experimental and nonexperimental estimates, though in each case the observational study was poorly designed and analyzed. Such evidence is more promising than what was achieved in past within‐study comparisons, most involving job training. Reasons for this difference are discussed. © 2008 by the Association for Public Policy Analysis and Management.     

Adapting to democracy: Societal mobilization and social policy in Taiwan and South Korea

Democratic transition and institutional change do not necessarily guarantee greater political inclusion, particularly when it comes to the policy influence of civil society groups. Rather, political inclusiveness requires strategic adaptation among societal actors. Actors need to seize upon opportunities endemic to political change. This article provides a comparative analysis of health care reform in democratizing Taiwan and South Korea, focusing on two social movement coalitions, the National Health Insurance Coalition in Taiwan and Korea's Health Solidarity. Both movement coalitions were critical in shaping welfare reform trajectories in Taiwan and South Korea during the late 1990s, despite having been shut out from earlier episodes of health care reform. I argue that these groups (1) strategically adjusted their mobilization strategies to fit specific political and policy contexts, (2) benefited from broad-based coalition building, and (3) effectively framed the issue of social welfare in ways that gained these movements ideational leverage, which was particularly significant given the marginal place of leftist ideas in the postwar East Asian developmental state model. Joseph Wong is assistant professor of political science at the University of Toronto. He is the author ofHealthy Democracies: Welfare Politics in Taiwan and South Korea, published by Cornell University Press. Wong received his Ph.D. from the University of Wisconsin-Madison. The author thanks Edward Friedman, Jay Krishnan, Ito Peng, Richard Sandbrook, Linda White, along with the three anonymous reviewers for their helpful comments on earlier drafts of this paper. Thanks also to Uyen Quach and Nina Mansoori for their research assistance.     

The Korean experience in FDI and Sino-Korean relations

The possibility of regional cooperation in the Yellow Sea Rim (YSR) area has been discussed since the early 1980s. In recent years, Korean outbound foreign direct investment (FDI) has increased rapidly and it will be growing much further. In the new phase of the global economy and the post-cold war political environment, Korean firms consider the socialist countries, especially China, to be attractive new partners for trade and investment projects. Foreign investment contributed to economic growth in developing countries. In the early stage of industrialization in the 1970s, the share of foreign firms amounted to about one-tenth of the total manufacturing employment in Korea. Similarly, outbound Korean FDI could also play an important role in the industrialization of the LDCs in Southeast Asia and China. A case study of a Korean multinational corporation reveals that the direct employment effect of Korea’s FDI is extensive in terms of money invested. In spite of the complementarity in economic structure and the phase of development between Korea and China, the prospect of Korea’s outbound FDI is not all clear. However, one can safely assume that the unit scale of FDI projects will increase. Unlike in the past, the large Korean corporations are now preparing more than a few fair-sized projects in China. The positive impact of those FDI will be significant. The YSR cooperation, if successful, could create efficient economic cooperation based on complementarity between Korea and China. The Korean outbound FDI would pave a road to such regional cooperation. This article is the revised version of a paper prepared for the International Conference on Regional Development in the Yellow Sea Rimlands, held February 18–21, 1991. The conference was cosponsored by the Korea Research Institute for Human Settlements, the State Science and Technology Commission of China, and the East-West Center of Honolulu, Hawaii.     

Update on Neuroimaging and Cognitive Functioning in Maltreatment-Related Pediatric PTSD: Treatment Implications

This article reviews maltreatment-related pediatric posttraumatic stress disorder (PTSD) neuroimaging and neuropsychology research. Existent interventions that target brain networks associated with PTSD and cognitive impairment are highlighted. Furthermore, the benefits of combining neuroimaging and neuropsychology research in treatment outcomes are discussed. To conduct this review, a literature search was done utilizing the words MRI, structural, functional, neuropsychological testing, children, maltreatment, treatment, and PTSD. This was supplemented with a direct search of developmental trauma experts. Results from the neuroimaging studies found differences in the total cerebral volume, prefrontal cortex, hippocampus, cerebellum, superior temporal gyrus, corpus callosum, and other regions in maltreatment-related childhood PTSD. Neuropsychological findings demonstrate deficits in memory, attention, learning, and executive function that correspond to these brain regions. Existent and novel psychotherapeutic interventions address these deficits. These interventions may be directed at key networks associated with cognitive processing. Future directions include the implementation of treatment outcome research integrating psychotherapy with putative biological and psychological markers.     

The Rising Urban Poverty: A dilemma of market reforms in China

Twenty years of market reforms have produced a thriving private sector motivated by revenue-generating opportunities and have made China as a whole wealthier. Aimed at balancing market efficiency with the Maoist concept of equity, the reforms have brought about a widening income gap and rising unemployment. These two predominant factors have had negative effects that are responsible for the emergence of a large group of urban poor whose demand for basic needs is under threat. Urban poverty, which may be ideally seen as transitional, has caused great concern as its duration may be persistently long for any political tolerance. This paper investigates the causes of urban poverty, unemployment and rising income disparity in China. It also explores the life conditions and characteristics of the urban poor, and some measures are suggested for the purpose of alleviating urban poverty.     

Beat patrol deployment in Hong Kong

This article addresses critical policy issues raised in the SB vs. DB debate. How should such a policy debate be resolved? What are the pros and cons of both patrol deployment measures? More importantly, what immediate and effective remedial steps can be taken to secure the front line police officers’ desire for safety and security without compromising the public's legitimate expectation for order and service. This article provides the HKP community — policymakers, operational managers and front line officers — with relevant research literature and pertinent empirical data to understand the issues involved and help resolve the debate in an informed and reflective manner. In the end, the article argues that education and training are more important than patrol deployment in reducing risk of injury to police officers in the line of duty. Removal of side arms and demilitarization of the HKP is also suggested.     

Investigation of trace inorganic elements in street doses of heroin

Sixteen trace elements found in 309 street heroin samples, piped water and contaminated water were determined using inductively coupled plasma-mass spectrometry. All the street heroin samples were found to contain high levels of sodium, a reflection of the use of sodium bicarbonate during heroin synthesis. Additionally, this element was also found to be one of the potential contaminants acquired from the piped water. Calcium could be derived from lime while iron, aluminum and zinc could have come from the metallic container used in the processing/cutting stage. The levels of these elements remained low in the heroin and it could be due to the dilution effects from the addition of adulterants. Statistical validation was performed with six links of related heroin samples using principal component analysis to find the best pretreatment for sample classification. It was obtained that normalization followed by fourth root showed promising results with 8% errors in the sample clustering. The technique was then applied to the case samples. Finally, the result suggested that the case samples could have originated from at least two major groups respectively showing unique elemental profiles at the street level.     

Jacques deLisle and Avery Goldstein,Eds., China’s Global Engagement: Cooperation,Competition, and Influence in the twenty-first Century

Journal of Chinese Political Science -     

The first international proficiency test on ketamine and norketamine in hair

This paper discusses the organization of the first international proficiency test (PT) programme on ketamine (K) and norketamine (NK) in hair samples. The primary objective of the programme was to evaluate the analytical capability of participating laboratories on hair analysis for K and NK via comparison of results. Authentic samples, instead of spiked samples were used in the programme to mimic the analysis of incorporated illicit drugs in real-life situations. Eight of the ten participating medical or forensic laboratories from Australia, France, Hong Kong, Italy, Singapore and the USA returned results to the organizer. Quantification methods from these laboratories were confined to GC-MS and LC-MS/MS. Performance assessment based on z-score indicated that only three laboratories achieved satisfactory results for both the analysis of K and NK. It was concluded that the overall performance of the participating laboratories was fair and there is still room for further improvement. Additional similarly designed PT programmes are recommended to be organized in order to encourage reliable measurements of illicit drugs in hair samples. Taking into account the substantial effect on the consensus values within limited number of data points, a recommendation on the provision of reference values assigned by accurate methods will be of benefit to small size PT programmes in the forensic field.