In the case of cogeneration, allocation operation costs has a particularity specific to joint production heat and electricity from same primary energy source. The cost is also influenced by demand conditions faced products, prices must be sufficient for both products remain profitable competitive with other power generation alternatives in respective markets. Therefore, choice methodology marke...

This forum discussion focuses on seven themes drawn from Sonya’’s fascinating paper: the terminology of ‘‘cogenerative dialogues,’’ the roles of participants and their power relations within such dialogues, the use of metaphor and analogy in the paper, science and science education for all students, the ways in which students’’ expectations about learning change in innovative classrooms, teache...