There are many other more powerful designs to be discussed at the end of this chapter, and later in this part, in which interventions are removed and added back, or are introduced in a step-wise...

There are many other more powerful designs to be discussed at the end of this chapter, and later in this part, in which interventions are removed and added back, or are introduced in a step-wise fashion, and the like. All build on the logic that is present in the basic A-B design.