Testing for lack of dependence in the functional linear model

The authors consider the linear model Y_n = ψX_n + ?_n relating a functional response with explanatory variables. They propose a simple test of the nullity of ψ based on the principal component decomposition. The limiting distribution of their test statistic is chi‐squared, but this distribution is also an excellent approximation in finite samples. The authors illustrate their method using data from terrestrial magnetic observatories.     

Health care reform and older adults: notes from the Polish experience

Poland enacted in 1997 legislation that founded a health care system in which health insurance societies contract with providers to deliver health services to the insured population. Through a review of the new statutes, interviews with key informants, analysis of public opinion polls and surveys of insurance administrators and health care workers, we examined the impact of reform on Poland's older citizens. The findings indicate that older adults are likely to be adversely affected by the inadequacies of insurance premiums as a source of finance, the lack of emergent private medical enterprise, and the failure to eradicate private health in its earlier, black market incarnation.     

Equal-bin-width histogram versus equal-bin-count histogram

The histogram has all its bin widths equal to some non-random number arbitrary set by an analyst (EBWH). In the result, particular bin counts are random variables. This paper presents also a histogram that is constructed in a converse manner. Bin counts are all equal to some non-random number arbitrary set by an analyst (EBCH). In the result, particular bin widths are random variables. The first goal of the paper is a choose of constant bin width (of bin numbers k) in the EBWH, which maximize the similarity measure in the Monte Carlo simulation. The second goal is a choose of constant bin count in the EBCH, which maximize the similarity measure in the Monte Carlo simulation. The third goal is to present similarity measures between empirical and theoretical data. The fourth goal is the comparative analysis of two histogram methods by means of the frequency formula. The first additional goal is a tip how to proceed in EBCH when modulo(n,k)≠0. The second additional goal is the software in the form of a Mathcad file with the implementation of EBWH and EBCH.Subject classification codes: 62G30, 62G07KEYWORDS: Empirical density function, histogram, random number generator, Monte Carlo simulation, similarity measure     

Minimum wage violation in central and eastern Europe

This article analyses minimum wage violations over the period 2003–12 in ten central and eastern European countries which all have national statutory minimum wages. Using European Union Statistics on Income and Living Conditions (EU‐SILC) data and the methodology proposed by Bhorat, Kanbur and Mayet (2013), the authors measure the incidence and depth of violation. In addition, they conduct regression analyses on individual, workplace and macro‐level determinants of non‐compliance. While the incidence of violation remains relatively low, the workers that minimum wage policies seek to protect appear to be the most likely to be affected by non‐compliance. Over time, higher minimum to average wage ratios are related to a higher incidence of violation.     

Polish complementary schools in Iceland and England

Since 2004, the opening of labour markets has spurred a considerable number of Poles to emigrate e.g. to Iceland and England. Families with school age children have had the challenge of adapting to foreign environments and school systems. Polish complementary schools have played an important, albeit ambivalent, role in this process. Through focus group interviews with students in Polish complementary schools in one city in Iceland and one city in England, we gathered information showing common threads between both schools as well as differences in their structure, role, origin and the student motivation to participate. Saturday schools abroad are considered to be less demanding by students than regular schools back in Poland, but more so than regular Icelandic/English schools, which many rate as unsatisfactory in terms of their academic development. The tension between the need for freedom and high expectations for the academic outcome of education influences student opinions, not only about schooling, but also about the host society.     

Governance, Organization, and Democracy on the Internet: The Iron Law and the Evolution of Wikipedia

This study examines whether the Iron Law of Oligarchy exists in Wikipedia by analyzing how a key policy of the website regarding verifiability evolved into its current form. The study describes the decision-making processes of Wikipedia and shows that there are many factors preventing or slowing the development of oligarchy on Wikipedia. The study provides data advancing theoretical concepts related to the Iron Law of Oligarchy and the evolution of virtual communities and organizations; results and knowledge gained can also improve Wikipedia policies related to verifiability. Michels wrote: who says organization, says oligarchy. I argue that we should follow this with a caveat: who says wiki-organization, says no to oligarchy.     

Changing the risky beliefs of post-partum women about therapeutic sun-exposure

BackgroundMany post-partum women hold risky beliefs about perceived therapeutic benefits of sun-exposure in the post-partum period and infancy.QuestionCan a maternity hospital based educational intervention reduce the prevalence of such beliefs among post-partum women?MethodsIn this outcome evaluation of an interventional study, two groups of healthy post-partum women (hospital inpatients) were interviewed, 1–4 days following delivery. The first cross-section (106 women) was recruited prior to in-services for maternity staff; the second (203 women) was recruited after completion of the in-services. Data were compared between the groups.FindingsMore pre-intervention than post-intervention women reported they would expose their baby to sunlight to treat suspected jaundice (28.8% vs 13.3%; p < 0.001) or help his/her skin adapt to the sun (10.5% vs 2.5%; p = 0.003); or use sunlight to manage breastfeeding-associated sore/cracked nipples (7.6% vs 2%; p = 0.026).ConclusionThis simple, effective educational intervention could be implemented in programmes for parents, health professionals and students.