Iscuss the limitations of Becken and Simmons (2008) approach to yield analysis AND discuss ways in which their model might be developed further.

Becken and Simmons (2008) in their article Using the concept of yield to assess the sustainability of different tourist types(Ecological Economics, 67, 420-429) have argued that
The yield analysis proposed in this paper could be a valuable tool for complex decision making and identifying strategies that lead to high-yield tourism(p.420)
Discuss the limitations of their approach AND discuss ways in which their model might be developed further