This contribution provides a long-term assessment of intergenerational social mobility trends in the United States across the 20th and early 21st century and assesses the determinants of those trends. In particular, we study how educational expansion has contributed to the observed changes in mobility opportunities for men across cohorts. Drawing on recently developed decomposition methods, we ...

A powerful means to understand young children's normative development in context is to examine their everyday activities. The daily activities of 79 children (3 years old) were observed, for 20 hr each, in their usual settings. Children were selected from 4 cultural groups: European American and African American (Greensboro, United States), Luo (Kisumu, Kenya), and European descent (Porto Alegr...

 In this study the quality of Omani and United Arab Emirates bottled water brands which are sold in Oman were assessed by comparing the chemical composition indicated on manufacturer’s label with local and international bottled water standards. Results indicated that all the bottled water brands are complying with local and international standards. According to piper diagram, t...

The prevalence of dental caries in 1,155 white and black preschool children was studied in the United States in 1969 and 1970. The results demonstrated that white children of the lower socioeconomic level had a significantly greater prevalence of dental caries than middle class white children, but a significantly lower prevalence than black children, most of whom represented the lower social cl...

The collective impact or result of this messaging, coinciding with other trends, is signifi cant. The United States Postal Service reports that its First-Class Mail volume – the class of mail that comprises personal fi nancial information and supports payments – has declined by nearly 11.5 percent since 2001, in large part because of people, businesses and households switching to electronic ban...

Microlight aircraft are increasingly becoming the most popular segment of private aviation. In the United Kingdom the majority (about 2500 of a total fleet of 3500) of these aircraft are of the weightshift class, also known as flexwings or trikes. This paper introduces the main issues involved in the design and operation of this class of aeroplane.

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U.S. Environmental Protection Agency’s (EPA’s) National Coastal Assessment was envisioned as a research effort led by EPA’s Office of Research and Development to evaluate assessment methods for ecosystem condition monitoring. The program was conducted through strategic partnerships with the coastal states. These states conducted the survey in their waters with a common set of indicators. The re...

The concept of socio-ecological transitions is used to analyse the quantitative importance of physical imports and exports for the Habsburg Empire and the United Kingdom in the 19th and early 20th centuries. For the Habsburg Empire, a new dataset of foreign trade and social metabolism is presented. For the United Kingdom, the analysis relies on previously published data. Foreign trade volumes i...