What is likely to happen if every morning a person low in self esteem repeats self affirmations such as "every day , in every way, i am getting better and better"?

Slowly but surely their self esteem will improve because it takes that self assuring voice for someone to start believing in themselves so there is a high probability of the person to start believing in themselves or to start being confident .

There is a saying which says if you think you can , you can but if you think you can't ,you can't.

So as the person keeps saying he is getting better the mind may start to believe this and it will become their reality with time.

no , per capita income is not a true measure of the development because: -it only tells us about average income not how income is distributed among the people.it only give us an idea of the economic aspect.it is only at the qualitative basis.moreover, income is not only the way of development other factors are also as much as important as income.