sentence: according to ben gurion university 's negev center for regional development , the towns were built without an urban policy framework , business districts or industrial zones ; as harvey lithwick of the negev center for regional development explains : '' ... the major failure was a lack of an economic rationale for the towns ... '' according to lithwick , and ismael and kathleen abu saad of ben gurion university , the towns quickly became among the most deprived towns in israel , severely lacking in services such as public transport and bank .