The book ""Letters of David Ricardo to John Ramsay McCulloch, 1816-1823"" is a collection of personal correspondence between two prominent economists of the 19th century - David Ricardo and John Ramsay McCulloch. The letters were originally written between 1816 and 1823 and were compiled and published in 1896.David Ricardo was a British economist who is known for his work on the theory of comparative advantage and the labor theory of value. John Ramsay...