One of the authors, social work lecturer Dr Irene de Haan, said: "The problem is the cumulative stress that arises from people being chronically short of money. I am concerned that the children live in families with chronic financial stress, lack of food, lack of money, constant moving around."
The researchers developed a "risk assessment tool" to predict whether a child was at risk of maltreatment based on 132 indicators in the CYFS and Work and Income data such as the children's past maltreatment, their parents' own maltreatment in their childhoods, single versus two-parent families, birth intervals between children and the parents' ages and educational qualifications.
Another author, economist Dr Claire Dale, said: "The theory is that we can take action before any harm comes to the child."
But the research came under political fire last night when Green MP Metiria Turei challenged Social Development Minister Paula Bennett to say whether the tool would be applied only to families on welfare.
"It justifies a very punitive approach to a very narrow number of people that she has already decided she wants to target," Ms Turei said.
A spokeswoman for Ms Bennett said: "Eventually they will be able to use the predictive model to look at risk factors for every child - not necessarily delving into the lives of every child, but they could potentially look at the risk factors around them."