OBJECTIVE The Strengths and Weaknesses of ADHS-Symptoms and Normal Behavior (SWAN) Scale has been developed to support the dimensional assessment of ADHD symptoms by capturing variance on both poles of the ADHD continuum. The present study provides the first validation of the German version of SWAN (SWAN-DE). METHOD Based on a sample of N1 = 343 children from the general population and N2 = 6...

â  â â â â â  â  â  abstract: â  there is a significant relationship between economic growth and the degree of urban concentration, as measured by primacy or the share of the largest city in an urban system. in accordance to urban economic theories, there is an inverse-u shape relationship between urban concentration –urban primacy- and economic growth. that is, as economy grows, urban concen...

This paper presents small world architecture for P2P networks (SWAN) for content discovery in multi-group P2P systems. A semi-structured P2P algorithm of SWAN is utilized to create and find long-range shortcuts toward remote peer groups. In SWAN, not every peer node needs to be connected to remote groups, but every peer node can easily find which peer nodes have external connections to a specif...

This paper presents a comparison of total factor productivity (TFP) levels between the US and Japan for the period 1960–2004 and allocates the gap to individual industries. We carefully distinguish the various concepts of purchasing power parity (PPP) and measure them within the framework of a US–Japan bilateral input–output table. We also measure industry-level PPPs for capital, labor, energy,...

Population decentralization has been a salient feature of the landscape of most U.S. urban areas since 1950. Nathaniel Baum-Snow (2007) documents that the aggregate population of central cities of the 139 largest metropolitan areas (henceforth, MSAs) declined by 17 percent between 1950 and 1990 while aggregate MSA population growth was 72 percent during this period. Expansion of the highway net...