Douglas Massey , a professor of sociology at Princeton University who heads the Mexican Migration Project , says that tougher border controls are changing the nature of illegal immigration .
Douglas Massey /business/person/company Princeton University
NNP NNP , DT NN IN NN IN NNP NNP WP VBZ DT JJ NNP NNP , VBZ IN JJR NN NNS VBP VBG DT NN IN JJ NN .
Douglas Massey
PERSON
Princeton University
ORGANIZATION
/business/person/company