I believe in the saying that "marry when you are ready". That means regardless of age as long as you know the consequences and have a solid plan in the future of his or her family regardless of how hard the path would be. The only problem in the society today is that many couples regardless of age make decision base on emotions or self gain which in return will only destroy their family and make an impact in the economy.
Regardless of age in terms of marriage it does not affect poverty as long you are both matured enough in mind and heart. Perseverance, hardwork, determination and being optimistic plays a vital role for you to achieve your goals in life and to support our economy.
in my opinion getting married at a young age cannot cause poverty, but for me that can trigger poverty is ignorance and difficulty finding work.