Unfavorable news are often delivered under the disguise of vagueness. Our theory-driven laboratory experiment investigates this strategic use vagueness in voluntary disclosure and asks whether there is scope for policy to improve information transmission. We find that profitably deployed by senders fool those receivers lack sophistication. Imposing precise leads more easily interpretable messag...

models for spatial data propose a list of types and fundamental operators that are needed in spatial data systems. The ROSE algebra (Güting 1994, Güting and Schneider 1995) and OpenGIS abstract specification (Open GIS Consortium 1999) both provide a similar list of spatial operators. (A comparison between the two models can be found in Dilo (2006).) To present the list of operators, we follow h...