Nonparametric panel stationarity testing with an application to crude oil production

A nonparametric panel stationarity test is proposed which offers the advantage of not requiring prior specification of the trend function for each of the series in the panel. A bootstrap implementation of the test is outlined and its finite sample performance is analyzed via Monte Carlo simulations. An application is also included where the proposed test is used to analyze the stochastic properties of monthly crude oil production for a panel of 20 -both OPEC and non-OPEC- countries from 1973 to 2015. Our analysis detects strong evidence of non-stationarity, both globally and group-wise. Results have implications for the effectiveness of government intervention and stabilization policies.KEYWORDS: Stationarity testing, panel, nonparametric, bootstrap, oil production     

Certified organic agriculture in Mexico: Market connections and certification practices in large and small producers

Certification within organic agriculture exhibits flexibility with respect to practices used to demonstrate that a product meets published quality standards. This case study of Mexican certified-organic agriculture finds two forms. Indigenous smallholders of southern Mexico undertake a low-input, process-oriented organic farming in which certification is based upon extensive document review, group inspections, and assessment of on-farm capacity to produce organic inputs. More recently, northern Mexican large agribusiness producers have implemented certifications based upon laboratory testing and assessment of purchased inputs. To specify these differences, this article examines large and small producers in Mexico's organic agriculture sector based on a diagnostic census of Mexican organic agriculture in 668 production zones and field surveys in 256 production zones in which 28 indicators were analyzed. After comparing the organic cultivation and certification practices of large, agro-industrial, input-oriented private firms versus small, cooperatively organized, indigenous and peasant groups, we analyze the implications of this duality for certification frameworks. We argue (with Raynolds, L., 2004. The globalization of organic agro-food networks. World Development 32(5), 725–743; Gonzalez A.A., and Nigh, R., 2005. Smallholder participation and certification of organic farm products in Mexico. Journal of Rural Studies; DeLind, L., 2000. Transforming organic agriculture into industrial organic products: reconsidering national organic standards. Human Organization 59(2), 198–208) that the increasing bureaucratic requirements of international organic certification privilege large farmers and agribusiness-style organic cultivation and present the possibility of a new entrenchment of socio-spatial inequality in Mexico. While organic and fair trade agriculture has been touted as an income-generating production strategy for small producers of the Global South, our study suggests that Mexican organic agriculture reproduces existing social inequalities between large and small producers in conventional Mexican agriculture.     

Sustainable Tourism as a Driving force of the Tourism Industry in a Post-Covid-19 Scenario

Social Indicators Research - The tourism industry is probably one of the most affected by the crisis caused by Covid-19. It is the responsibility of politicians, tourism professionals and...     

Implementing a Point‐Based Rewards System as an Educational Tool in Children's Home: From Standardisation to Coconstruction and Negotiation

From a wider educational ethnography, we analysed the implementation of a point‐based reward system as an educational tool in a Spanish children's home. This is examined within a policy and ideological framework strongly influenced by Evidence‐Based Practice, Standardization and New Public Management. The findings show, first, how this system relied on a balance between greater use of standard tools and the experience of the managers; second, how, in practice, basic procedures regarding the system's rigour and objectivity were altered; and third, how the ratings given to evaluate children were very often coconstructed and influenced by broader individual, social and institutional processes.     

Observing Erotic Videos With Heterosexual Content Induces Different Cerebral Responses in Homosexual and Heterosexual Men

ABSTRACT

To determine the cerebral functionality associated with the perception and processing of erotic stimuli in men with different sexual orientation, this work evaluated the electroencephalographic activity (EEG) from several cortical areas, as well as subjective arousal in homosexual and heterosexual men during observation of an erotic film with heterosexual content. The heterosexual men rated the erotic video with higher general and sexual arousal than the homosexual participants. During observation of the neutral and erotic videos, both groups showed a decreased amplitude of the alpha band in prefrontal and parietal cortices, indicating increased attention. When watching the erotic video, the homosexual men showed an increased amplitude of the theta and fast bands only in the prefrontal cortex, which could be related to the cognitive processing of the erotic stimulus. These EEG results should broaden our knowledge of the cortical mechanisms related to the different perception and processing of erotic stimuli in men with different sexual orientations.     

GROUP LENDING WITH HETEROGENEOUS TYPES

This paper proposes and implements a mixture structure to model repayment behavior in group lending with unobserved group heterogeneity. We discuss the model properties and identification and estimate the model using a rich dataset from a group lending program in India. The estimation results support the existence of two different group types: “responsible” and “irresponsible” groups. We find that the effects of the factors driving repayment behavior differ across types. The model also shows a higher predictive performance than standard probabilistic models, particularly in the identification of potential defaulters. We provide evidence supporting the robustness of our estimations. (JEL O16, C35)     

An integrated relapse prevention and relationship safety intervention for women on methadone: testing short-term effects on intimate partner violence and substance use

This study tests the feasibility, safety, and short-term preliminary effects of a relapse prevention and relationship safety (RPRS) intervention in reducing drug use and the experience of intimate partner violence (IPV) among women on methadone. For this randomized controlled trial, 34 women who met IPV and drug use criteria were randomly assigned to either the RPRS condition (n = 16) or a one-session informational control (IC) condition (n = 18). RPRS participants were more likely than IC participants to report a decrease in minor physical or sexual IPV (OR = 7.1, p = .05), minor psychological IPV (OR = 5.3, p = .03) and severe psychological IPV (OR = 6.07, p = .03) at the 3-month follow-up. Data suggest that RPRS participants were also more likely than IC participants to report a decrease in any drug use at 3 months (OR = 3.3, p = .08). This study provides preliminary evidence that the RPRS intervention is effective in reducing IPV and drug use among women on methadone.     

Do performance and environmental conditions act as barriers for cross-border banking in Europe?

This paper attempts to analyse whether banking technology and environmental conditions act as barriers for the entry of foreign banks in each European banking industry. We evaluate how the efficiency score of a representative commercial bank of a given European country changes if it decides to move abroad. To carry out this analysis, we use a sample of 700 banks belonging to 11 European countries. Countries are paired and each couple is studied by using four DEA production frontiers. These frontiers allow us to measure the technological and environmental gaps between the two countries considered and, based on them, to predict the new efficiency score of the representative bank of a country that decides to operate in a different country. The results indicate, as expected, that being technologically advanced appears to be a significant deterrent to foreign competition, and that adverse environmental conditions constitute a real barrier for cross-border banking activity. Additionally, the results suggest that host-nation banking performance is a good safeguard against cross-border competition.     

Staying Close to the Core: Lessons from Studying the Costs of Unrelated Alliances in Spanish Banking

This article analyses whether alliances create shareholders value, and if this value differs depending on the similarity of the partners' businesses, or on the similarity of the partners' businesses with that of the alliance. Using data from 467 equity and non-equity based strategic alliances from 1996-1999 involving at least one listed Spanish bank, we find that, overall, alliances create shareholder value, but that the returns to shareholders are significantly higher when alliance activity is closer to the core business of the banks, than when alliances involve unrelated activities. Although there is no evidence that unrelated strategic alliances destroy value on average, the results obtained show that banks need to assess the benefits and costs of diversification strategies carefully, as their likelihood of success is initially smaller.