Relationship breakdown and a mother or father losing their job are key triggers for transitions into child poverty, according to new research from the ESRI.
The study by the Economic and Social Research Institute is part of the research programme, 'Growing up in Ireland’.
The economic circumstances of children from infancy to 9 years (the 2008 cohort) and from 9 years to 17 years (the 1998 cohort) are examined as part of the research.
The latest study shows that in the 1998 cohort families where a partner had left the household were 2.5 times more likely to become poor than families where there was no partnership change.
In the 2008 cohort, the risk was 3.5 times greater.
The ESRI used a multi-dimensional measure of poverty that incorporates low income, deprivation and having difficulty making ends meet.
The Institute said this provided an opportunity to study longer term exposure to poverty in a way that had not been possible before.
It said the impact of "the Great Recession" is visible for both cohorts, with rates peaking in 2011- 2012.
The study shows maternal job loss is as important as paternal job loss for becoming poor in mid to later childhood and is almost as important in early childhood.
It said entering full-time work "triggers poverty exits", however taking up part-time work does not.
Even children who have a once-off experience of poverty have worse outcomes than those who are never exposed.
The relationship between the duration of poverty exposure and outcomes was equally strong for both cohorts, according to the study.
It suggests that effective policy interventions can be made throughout children's and young people’s lives and not only in early childhood.
Speaking to RTÉ's Morning Ireland, ESRI research professor Dr Helen Russell said around half of children who experience poverty will experience transitory poverty, while half will experience more persistent poverty.
Dr Russell said this has an impact on a range of outcomes for the child, with those who experience persistent poverty suffering the most.
She said that 10% of children who were never poor suffer a chronic illness or disability, this rises to 13% in the transient group and 21%t among children who experience persistent poverty.
There were similar outcomes in education, she said, with poorer results experienced by those who live in persistent poverty.
Dr Russell said that intervention across the whole of children’s lives would disrupt this cycle and have a positive result on outcomes.
The report will be launched by the Minister for Children, Equality, Disability, Integration and Youth Roderic O’Gorman this morning.