Comparing community garden typologies of Baltimore,Chicago, and New York City (USA) to understand potential implications for socio-ecological services

Urban community gardens offer unique social and ecological benefits in cities. However, given the dynamic nature of cities and the profound effects of variable land uses on green space provisioning for people and wildlife, investigating community gardens from a landscape perspective offers valuable insight into the functions of these spaces in terms of ecosystem services and sustainable development. In this study, we use garden locations provided by stakeholder groups and fine-scale spatial data to compare community gardens across three cities: New York City, NY, Chicago, IL, and Baltimore, MD (USA). In each city, we assess the spatial distribution of gardens and compare the natural vegetation and impervious surface cover within these gardens to the surrounding neighborhood and landscape. We then compared these cities to clarify the role of community gardens in metropolitan development. Our findings demonstrate that gardens cluster in neighborhoods in New York City and Chicago, but they are more spatially distributed across the landscape in Baltimore. The distribution of Baltimore’s community gardens is more likely to be contributing to a greater network of ecosystem services across a broader urban landscape. Moreover, at the garden scale, gardens in NYC and Chicago have more canopy cover and built infrastructure than the more herbaceous gardens in Baltimore. This suggests that our case study cities exhibit different garden typologies, histories, and potential for ecosystem services. This work provides critical insight into the typology in and around community gardens in different cities, which is useful in understanding the potential ecosystem services and planning trajectories of these cities.

     

A general equilibrium analysis of the Laffer argument

This paper examines the Laffer argument (i.e., the possibility that an increase in a tax rate may reduce tax revenues, and vice versa) in a general equilibrium model and using tax reform techniques. Our methodology allows us to examine the Laffer argument in a very general setting. Despite the high level of generality, we are able to reach some clear conclusions that happen to provide some support for the intuition that the Laffer effect requires: (1) a “ high” labour-income tax rate, and (2) a “ large” labour supply response to wage changes. However, the notions of “high” and “large” in our framework are quite different to the interpretations given them in conventional wisdom about the Laffer argument. The analysis also provides indirect support for the intuition that it is not optimal for a government to operate on the downward-sloping segment of the Laffer curve.     

Children's altruism in public good and dictator experiments

We examine the development of altruistic and free-riding behavior in 6-12 year-old children. We find that the level of altruistic behavior in children is similar to that of adults but that repetition has a different effect. Younger children's contributions of older children, like those of adults, tend to decline. Group attachment is associated with higher contributions. Contributions in a subsequent dictator experiment are correlated with first-round contributions in the public good experiment, but are not strongly correlated with last-round contributions.     

基于混合研究法的中国重要休闲议题的识别研究

为了探索未来中国休闲研究的关键问题,28位从事休闲研究的中国学者参加了由北京第二外国语学院主办、美国伊利诺伊大学与加拿大阿尔伯塔大学联合承办的2013年中国休闲与社会进步学术年会及期间的研究项目,这些学者还成为该项目的受访者。运用序列解释混合法对28位专家进行意见征询和反馈,最终,中国学者确定了如下9个休闲议题：时间利用、休闲与幸福（生活满意度）、公共政策和规划、家庭休闲、需要和动机、技术变革、休闲空间和资源、休闲教育、休闲与传统文化。这些领域反映了中国文化与社会焦点的影响力,对21世纪第二个十年的中国社会具有特殊的重要性,对如何改善休闲服务供给问题具有重要启示,同时也对建设和谐社会有重要的参考作用。     

An equivalence test for comparing DNA sequences

The practice of sequence alignment is constantly oscillating between the risk of overlooking important structure and that of discovering any arbitrarily defined kind of structure anywhere. On the other hand, the use of a condensed consensus sequence may lead to a substantial loss in valuable information. While adopting a Mahalanobis‐type index we allow for a certain degree of uncertainty in the measurements. This uncertainty may be caused by inaccurate measurements or ambiguity. In this paper, we test the similarity between DNA sequences within the framework of equivalence testing, accounting for both variances and covariances between frequencies of nucleotides. Statistical methods for testing equivalence were first developed in the context of pharmacokinetics and later extended to the field of clinical trials. Nowadays, (bio)equivalence tests seem to be less frequently used outside the drug testing field, including statistical genetics. Copyright © 2005 John Wiley & Sons, Ltd.     

Countertransference reactions in therapeutic work with incestuous sexual abusers

The study was a qualitative investigation aimed at therapists' responses to working with a population of incestuous sexual abusers. Semi-structured interviews were conducted with nine therapists who were recruited from psychotherapy, psychology, and forensic psychology services in the National Health Service (NHS) in the UK. The predominant therapeutic model was psychodynamic; however, cognitive-behavioural and integrative approaches were practiced by some therapists. The data were analyzed using interpretative phenomenological analysis (Smith, 1996). Results suggested that the therapists experienced a considerable amount of negative and difficult feelings and that they tended to experience feeling controlled and deceived, which seemed to influence their ability to create and maintain the therapeutic relationship. It was suggested that the dynamics of incestuous sexual abuse played a part in these difficulties. The results are discussed with reference to the clinical therapeutic literature.     

Flexible arrangements with the highly qualified workforce: antecedents and effects of different contract policies in knowledge-intensive firms

It is the aim of this paper to emphasize the antecedents leading to flexible contract arrangements in comparison to standard employment, and the effects of different contract policies especially for flexible contracting with the highly qualified workforce in knowledge-intensive firms. So far, there are contradictory findings as to what contract arrangement can be considered as advantageous in this field. Our analysis is based on qualitative fieldwork in Germany, including ten company cases. We reveal three organizational types of contract policy: One type relies on permanent employment, another on independent contracting with freelancers and a third pursues a combination of both. We identified the way of generating and protecting knowledge as an antecedent of different contract policies of organizations in knowledge-intensive fields. Another finding is that the question of gaining positive or negative effects—for both standard and flexible contracting—especially depends on the embeddedness of the contract policy in a broader set of HR practices. Our analysis adds to former studies, as it specifies that flexible contracting with an independent workforce in knowledge-intensive work environments can be pursued if there is an efficient substitution for internal control mechanisms in terms of controlling knowledge channels.     

‘Scarred’ young entrepreneurs. Exploring young adults’ transition from former unemployment to self-employment

The recent increase in youth unemployment has major implications for the current and future development of European labour markets. Previous studies reveal the long lasting ‘scarring effects’ of early unemployment experience on later career prospects, including a higher probability of future unemployment or social exclusion. Self-employment is often advocated as a potential remedy for unemployment in general and youth unemployment in particular. In this study, we investigate the individual-level factors that lead young people with the ‘scar’ of previous unemployment to engage in self-employment. Based on a recent survey among young adults in eleven European countries, we show that previous unemployment has a significant moderating effect on other individual-level characteristics usually associated with a higher likelihood of being self-employed. While the overall propensity of self-employment is not affected by unemployment experience, the reasons for becoming one’s own boss differ considerably between those young adults who have and those who have not experienced unemployment in the past.