Analysis of the non-native flora of Ensenada, a fast growing city in northwestern Baja California

Urbanized areas show a high proportion of non-native plants and can work as dispersal points to the surrounding areas. Ensenada is a fast growing city located in the northwestern peninsula of Baja California (Mexico). It is the southern extreme of a bi-national, coastal urban corridor that extends from Los Angeles, California south to Ensenada. This corridor is part of the biodiversity hotspot of the California Floristic Province. The aim of this study was to analyze the composition and distribution of the spontaneous flora in the city of Ensenada. We systematically sampled two differentiated urban environments, vacant lots and arroyos, in 2006 and 2007. We found a total of 158 plant species, 61% of them were non-native species. Arroyo areas showed higher non-native species richness than vacant lots (21.9 vs. 13.6 species/transect) and could be potential dispersal vectors for non-native species to natural areas outside of the city, or in the reverse direction also.     

Nonparametric estimation of welfare changes

In this article, I propose a simple nonparametric method of estimating welfare measures with no structural assumptions on the demand system. The method is illustrated for both the single good and the multiple good case, using simulated data. Standard errors of the welfare changes are derived using standard bootstrap techniques. The compensating variation and deadweight loss resulting from a housing price increase is evaluated using Canadian mortgage data. The GAUSS coding, which is very short, is included.     

Are Female Executives Over‐represented in Precarious Leadership Positions?

We use a sample of CEO appointments at US corporations over the years 1992–2004 to test the 'glass cliff' hypothesis, which posits that females are appointed to leadership positions at firms that are in a precarious financial condition. Our analysis utilizes three measures of stock-price-based financial performance and two distinct control samples of appointments of males to the CEO position. We find that corporate performance preceding CEO appointments tends to favor females, implying that females (males) are appointed to the CEO position largely at times when the firm is in relatively better (worse) financial health. Disaggregating the data by appointments in up versus down markets, at high-risk versus low-risk firms, and by calendar time yield similar conclusions. There appears to be no glass cliff facing female CEOs at US firms. Our findings suggest a need for additional research to identify where and for what types of positions this phenomenon is prevalent.     

Coalitions and clientelism in Mexico

Theory and Society -     

Mental Health and Clinical Correlates in Lesbian,Gay, Bisexual,and Queer Young Adults

Abstract

Objective: This study examined the prevalence of mental health disorders and their clinical correlates in a university sample of lesbian, gay, bisexual, and queer (LGBQ) students. Participants: College students at a large public university. Methods: An anonymous, voluntary survey was distributed via random e-mail generation to university students during April and May of 2011. LGBQ students were compared with their heterosexual counterparts on psychological and physical status as well as academic performance. Results: LGBQ students reported worse depressive symptoms, higher levels of perceived stress, considered themselves less attractive, and were more likely to be overweight. LGBQ students were significantly more likely to report histories of affective, substance use, and certain anxiety disorders as well as compulsive sexual behavior and compulsive buying. Conclusions: The higher rates of many psychiatric conditions among LGBQ students underscore the need for universities to provide LGBQ students a nonjudgmental environment to discuss sexual orientation and health issues.     

Elsevier's Strategic Partners Forum: A Climate of Change and Challenge

Abstract

Elsevier's Strategic Partners Program (SPP) convened a forum prior to the American Library Association's 2003 midwinter conference in Philadelphia, PA. Two presentations from that forum are published here to indicate the enormous challenges, initiatives, and changes that face all of us in the serials, publishing, and information environments.     

Integrating Children into Families Separated by Migration: A Caribbean-American Case Study

Caribbean peoples have been migrating to the United States for over one hundred years. Since the liberation ofimmigration policy in 1965, migrationfrom the Caribbean has increased considerably and has presented with an interesting permutation. Many single mothers have migrated leaving young children behind until the mother’s situation is stable in the United States. Upon reunification of child and parent, there are reports ofmarked adjustment difficulties. This paper examines one such case, which was presented for mandated treatment. Issues around intention strategy and implementation are explored in detail with references to case history and clinical theory.     

The Trans-Theoretical Model of Change: A Reliable Blueprint for Assessment in Work with Children and Families?

Correspondence to John Corden, 1 Brockfield Road, Huntington, York YO31 9DX, UK. Email: John_Corden{at}msn.com Summary In this paper, the authors consider the promotion of Prochaskaand DiClemente’s transtheoretical model of change (theTTM) to the assessment of parenting capacity, within the literaturewhich supports the Framework for Assessment. A number of criticismsof the model, originating from within its original area of applicationare reviewed, and considered in the context of the assessmentof parenting. The authors go on to raise certain questions aboutthe validity of transferring this model from the field of addictivebehaviours to that of parenting and child protection.