The Sculpture Market: An Adjacent Year Regression Index

This paper analyses the performance of an investment in sculpture during theperiod 1987–1995 by applying the hedonic price technique with time dummyvariables to a sample of over 27,000 sales at auctions. The main finding isthat the adjacent year price index differs substantially between theinexpensive/middle portfolio and the expensive portfolio. The first showsthe existence of a boom period until 1990, followed by a non boom period. Bycontrast, the return of an investment in the expensive portfolio performedsomewhat better during the period analysed, with the only fall in the priceindex in 1990 and 1991.     

Moral development in a violent society: Colombian children's judgments in the context of survival and revenge

Ninety-six Colombian children (mean age = 7.7 years) and adolescents (mean age = 14.6 years) made judgments about stealing and physical harm in the abstract and in the context of survival and revenge. All participants judged it wrong to steal or hurt others because of considerations with justice and welfare, and most also judged it wrong to engage in such actions even when they can aid in survival. Their judgments in the context of revenge were more mixed, with a sizable proportion endorsing stealing and hurting in that condition. Furthermore, the majority expected that people would steal and hurt others in most situations. Significant age differences were also found. The consequences of political violence for moral development are discussed.     

Formative research on an early stage of the systemic change process in a small school district

This study utilised a qualitative research methodology known as formative research to improve the process guidelines that are described in the Guidance System for Transforming Education (GSTE). This study took place in a small (5447 students), partly urban and partly rural school district in Indiana. The researchers, also serving as change facilitators, investigated an early stage of the systemic change process as outlined in the GSTE. Specifically, the research focused on field‐testing and improving the process for assessing the district's readiness for change. It was found that this process could have been improved if the facilitators had had more guidance to help them develop the interview protocols.     

Multilateral agencies and higher education reform in Latin America

During the last decade, the debate over higher education took up a significant space on the agendas of various international agencies, including multilateral development banks and other intergovernmental agencies. This fact points to the importance of the subject within a broader discussion that refers to national development projects and their articulation within the new international economic and political order. In this context, the purpose of this article is to discern the principal lines of argument at work and their implications for the transformation of higher education in Latin America. To this end, we have chosen four cases that we consider relevant for the region: The United Nations Education, Science and Cultural Organization (UNESCO), the World Bank, the Economic Commission for Latin America and the Caribbean (ECLA) and the Interamerican Development Bank (IADB). In the first part of the text we characterize the particularities of each of these organizations, highlighting their relation with the processes of educational change. In the second, we approach the subject of the recommendations made by the multilateral agencies on change in the higher education systems in the world and, particularly, in the Latin American region.     

Using the coefficient of determination R2 to test the significance of multiple linear regression

This article proposes the use of the coefficient of determination as a statistic for hypothesis testing in multiple linear regression based on distributions acquired by beta sampling.     

The building stones of the ancient centre of Naples (Italy): Piperno from Campi Flegrei. A contribution to the knowledge of a long-time-used stone

Piperno, a Late Quaternary magmatic rock cropping out on the eastern side of the Campi Flegrei (Italy), is probably the most important building stone of Naples, used over a time-span from at least the Roman age until the beginning of the 20th century. Despite its wide diffusion in the monumental architecture of Naples, very little is known about this rock, as regards its technical features, as well as the geological aspects. This paper aims at providing a first overall contribution towards a rediscovery of this long-time-used material, in view of careful restoration works, which nowadays at Naples only take into account the proper geological features of the stone in a few peculiar cases. Thus, it seems of extreme importance to understand the basic parameters of Piperno and, above all, its response to weathering agents. Main mineralogical, petrographical and engineering–geological properties are presented here for the first time, with specific reference to two sampling areas, located at Pianura and Soccavo, in the western sector of the Neapolitan urban area. As far as many of its physico–mechanical features are concerned, Piperno extends over a wide range of values, which allow different varieties of the rock to be identified. This preliminary result is seemingly in accordance with data from old historical literature, which stated the existence of six horizons in the Piperno formation.     

Is season of birth related to developmental dyslexia?

Different moderators/mediators of risk are involved in developmental dyslexia (DD), but data are inconsistent. We explored the prevalence of season of birth and its association with gender and age of school entry in an Italian sample of dyslexic children compared to an Italian normal control group. The clinical sample included 498 children (345 boys, mean age 10.3 ± 2.1 years) with DD, the control sample 1,276 children (658 boys, mean age 10.8 ± 2.2 years) from four elementary schools from the same urban area, and with the same socio-economic status level. A prevalence of birth in autumn was found among children with DD compared to controls (34% versus 24%, p < 0.0001). Children with DD were more frequently males (p < 0.0001) and had a lower mean age of school entry (p < 0.0001). Regarding the distribution of ages, 11.4% of children with DD, but none of the subjects in the control group, started school before 5.7 years. Therefore, greater risk of DD was related to age of school entry (OR = 2.72), gender (OR = 2.16), and season of birth (OR = 1.21). Significant interactions between boys with DD born in autumn, and correct school of entry (OR = 2.56) were joint predictors of higher risk of DD. The association between birth in autumn and DD may be explained by the earlier age of school entry, which may be a critical element in the youngest children with DD or at risk to DD. Whether Italian school policy is oriented to anticipate the school entry, a closer detection of early learning disorders and associated risk factors (familial load, specific language disorders, and attention deficit hyperactivity disorder) should be warranted.