Complex sentence: Indian economist Amartya Sen (1933 -) is a leading development and welfare economist who expressed considerable skepticism about the validity of neoclassical assumptions, and was highly critical of rational expectations theory, devoting his work to Development Economics and human rights.
Split into simpler sentences: Indian economist Amartya Sen (born 1933) is a leading development and welfare economist who has expressed considerable skepticism on the validity of neoclassical assumptions. He was highly critical of rational expectations theory, and devoted his work to development and human rights.