Aggregative games are used to model strategic interaction in many …elds of economics, including industrial organization, political economy, international trade, and public …nance. In such games, each player’s payo¤ depends on his/her own actions and an aggregate of all player’s actions. Examples in industrial organization are the Cournot oligopoly model, logit and CES di¤erentiated products Ber...

in this paper, the possibility of using recycled aggregate (ra) and ground granulated blast furnace slag (ggbfs) to produce a structural concrete was studied by compromising strength to a lesser extent. hence an attempt has been made to study the strength and durability characteristics of the ggbfs-based recycled aggregate concrete. four different groups of mixes were designed by replacing natu...

In the present study, lightweight expanded clay aggregate (LECA) coated with iron oxide was investigated as a low cost sorbent to remove  from wastewater. Iron oxide coated LECA (IOCL) as a new sorbent was tested for its efficiency as  sorbent using operational parameters such as contact time, the initial pH of the solutions, and sorbent dosage concentration in batch systems. The adsorption cha...

This article assesses the unilateral effects on prices of a merger in the Portuguese mobile telephony market. We use aggregate quarterly data from 1999 to 2005 and a nested logit model to estimate the price elasticities of demand and the marginal costs of subscription of mobile telephony. Given these estimates, we simulate the effects of the merger. We find that the available mobile telephony s...

We propose a parallel optimizer for queries containing a large number of joins, as well as set operators and aggregate functions. The platform of execution is a shared-disk multiprocessor machine supporting bushy parallelism and pipeline. Our model partitions the query into almost independent subtrees that can be optimized simultaneously and applies an enhanced variation of the iterative improv...