Today's Google doodle honors the lifetime achievements of the saint Lucian economist Professor and Author Sir W.Arthur lewis. Sir Lewis was the first and only black economist to receive a noble memorial prize on December 10, 1979. 

He jointly received this award for his pioneering work on modeling economic forces that impact developing countries. W. Arthur Lewis was a pioneer in the field of modern development economics. 

He was also the first black faculty member at the London School of economics the first black person to hold a chair in a British university and the first black instructor to receive full professorship at Princeton University from his undergraduate days. 

William Arthur lewis had sought a solution to the question of what determines the relative prices of steel and coffee another problem that troubled him a lot was historical apparent during the first 50 years of the industrial revolution actual wages in Britain remained more or less consistent while profits and savings raised. 

This could not be obliged with a neoclassical framework in which a rise in investment should In August 1952. While walking on the streets in Bangkok, increase wages and one day return to the capital. 

William Arthur lewis suddenly noticed that both problems have an identical/same solution throw away the neoclassical assumption that the quantity of labor is fixed an unlimited supply of labor will remain wages down producing cheap coffee in the first case and high profits in the second case. 

The result is a dual economy where one part is a reservoir of cheap labor for the other. The unlimited supply of labor derives ultimately from population pressure. 
So, it is nothing but a phase in the demographic cycle the publication of Sir William Arthur lewis's article on this subject in 1954 was greeted equally with applause and cries of outrage. William Arthur Lewis was born on January 23, 1915. 

In Castries on the Caribbean island of Saint Lucia despite facing challenges with ethnic discrimination in 1932, he prevailed/won a government scholarship and set out to study at the London School of economics where he ultimately earned a doctorate in industrial economics.
 
Lewis quickly ascended the ranks of academia and by 33 was a full Professor Lewis shifted his focus to world economic history and economic development. 

And in 1954 published his foundational article on economic development with unlimited supplies of labor he undertook important work for the united nations and served as an advisor to governments in Africa, Asia, and the Caribbean. 

He also helped establish and served as the first president of the Caribbean development bank in honor of his lifelong achievements the British government united lewis in 1963.