Vol. XLIX (April 2012), 175 –191 *Maria Ana Vitorino is an Assistant Professor, The Wharton School, University of Pennsylvania (e-mail: [email protected]). This article is based on the author’s doctoral dissertation at the University of Chicago. The author is indebted to dissertation advisors Jean-Pierre Dubé, Pradeep Chintagunta, Kenneth Judd, Peter Rossi, and Matthew Gentzkow for the...

This paper outlines and analyses the behaviours of small and medium enterprises with respect to the evaluation of electronic commerce investments, and the subsequent realisation of the anticipated benefits from those investments. The responses of executives who participated in the study suggested that on-going involvement in electronic commerce did not come cheaply. Nonetheless, our study sugge...

In recent times, games-based learning has been attracting the attention of educators around the world. One of the challenges in deploying games-based learning to cover a larger proportion of the curriculum is the high costs associated with development of the games. Games development often requires specialized skills sets. Inputs from academic specialists for the learning content and pedagogy is...

Peter Reddien attended graduate school at MIT in the lab of Bob Horvitz, studying programmed cell death in Caenorhabditis elegans. He carried out postdoctoral work with Alejandro Sánchez Alvarado at the University of Utah, where he performed the fi rst planarian RNA interference screen. He started his lab at the Whitehead Institute and the Department of Biology at MIT in 2005 and is an HHMI Inv...

In this paper a novel distributed video coding scheme was proposed based on Heegard-Berger coding theorem, rather than Wyner-Ziv theorem. The main advantage of HB coding is that the decoder can still decode and output a coarse reconstruction, even if side information degrade or absent. And if side information present or upgrade at decoder, a better reconstruction can be achieved. This robust fe...

Four new species of Trigonalyidae are described and illustrated from Qinling Mts (Shaanxi, NW China): Bareogonalos xibeidai Tan & van Achterberg, sp. n., Jezonogonalos mandibularissp. n., J. shaanxiensissp. n., and Taeniogonalos paraclypeatasp. n.Orthogonalys hirasana Teranishi, 1929, is re-instated and reported from China. The female of Taeniogonalos alticola (Tsuneki, 1991) is described for t...

Th& article departs &ghtZy from previous ones in the annual series on national heaZth expenditures. Data were fomerly presented for calendar years beginning with 1950. This year the article presents historical data back to 1929, on both a fiscal-year and calendar-year basis. Detailed fiscal-year data by source of funds and type of program are reported regularly in the annual report on sociaZ we...

Christian Basarke, Institut für Software Systems Engineering, Technische Universität Braunschweig, [email protected] Christian Berger, Institut für Software Systems Engineering, Technische Universität Braunschweig, [email protected] Kai Homeier, Institut für Betriebssysteme und Rechnerverbund, Technische Universität Braunschweig, [email protected] Prof. Dr. Bernhard Rumpe, Institut für...