Title: Some advances in designing multi-stratum experiments
Authors: Luzia Trinca - Unesp (Brazil) [presenting]
Steven Gilmour - KCL (United Kingdom)
Abstract: Multi-stratum experiments are frequently performed in many areas as, for example, laboratory biology, agriculture and engineering. Often experimental cost does not allow the use of orthogonal layouts and it is important to have general methods to construct efficent designs for the practical problems. The stratum-by-stratum approach is quite flexible and can be used with any design criteria including compound criteria in order to construct flexible and efficient designs. Here we explore the flexibility of such approach, including properties that allow pure error degrees of freedom in the several strata, a common defficiency presented by designs constructed by usual approaches. A few illustrations are given.