All the progress made by the economists who established the theory of welfare, are based on the needs for the progress in engineering that marked out the era of the industrial revolution. All the models that go along with these theories are based on the science of engineering and contributed at...

Impact Evaluation of the Brazilian Social Programs on Family Welfare Key-words: impact evaluation; cash transfer; public policy; labor supply; child labor; school attendance. This study uses an impact evaluation methodology to analyze the non-contributory pension program BPC on family welfare....