Addition of runs to an s-level supersaturated design

The purpose of the present work is to extend the work of Gupta et al. (2010) to s  -level column balanced supersaturated designs. Addition of runs to an existing E(χ²)-optimal$E({\chi }^2)\mathrm{-}\mathrm{optimal}$ supersaturated design and to study the optimality of the resulting design is an important issue. This paper considers the study of the optimality of the resulting design. A lower bound to E(χ²)$E({\chi }^2)$ has been obtained for the extended supersaturated designs. Some examples and a small catalogue of E(χ²)-optimal$E({\chi }^2)\mathrm{-}\mathrm{optimal}$ supersaturated designs are also presented.     

Addition of runs to a two-level supersaturated design

The purpose of this article is to introduce a new class of extended E(s²)-optimal two level supersaturated designs obtained by adding runs to an existing E(s²)-optimal two level supersaturated design. The extended design is a union of two optimal SSDs belonging to different classes. New lower bound to E(s²) has been obtained for the extended supersaturated designs. Some examples and a small catalogue of E(s²)-optimal SSDs are also included.     

Appropriate Theorizing about African Women and the Internet

The WomenAction 2000 case data illustrate that the Internet situation among women's organizations in Africa is highly problematic. The women have specific computer network needs - and even among this 'group' the needs vary. They further represent grassroots women who have no access to computer networks. The survey data illustrate that appropriate theorizing on Internet working by women in Africa must address both technological and social issues. It must also integrate gender, North-South, context and other aspects. For this purpose, available approaches are neither complete nor entirely adequate. Together however, they offer enough building blocks to study African women and Internet introduction appropriately. Constructivist technology studies (including gender and technology approaches) offer good starting points for an appropriate model. Nevertheless, constructivism needs additions to support gender empowerment in the South. Critical development studies and the integrative view on global communications offer useful additions to this end.     

THE EFFECTS OF ASSET FORFEITURE ON POLICING: A PANEL APPROACH

Asset forfeiture has proven highly controversial in the United States since its expansion in 1984. Most contentious is the widespread policy that allows police agencies to keep the assets seized, which both proponents and critics assert changes police behavior. From newly developed panel data sets, we find some statistical support for the proposition that police agencies change the intensity and pattern of policing in response to forfeiture. However, in economic terms these effects are very weak and do not support the proposition that forfeiture provides vital funds and incentives for crime policing. (JEL H39, H71, K42)