David Ricardo was born in London in 1772. His father, a successful stockbroker, introduced him to the Stock Exchange at the formative age of fourteen. During his career in finance, he amassed a personal fortune which allowed him to retire at the age of forty-two. Thereafter, he pursued a political career and further developed his economic ideas and policy proposals. A man of very little formal education, Ricardo arguably became, with the exception of Adam Smith, the most influential political economist of all time.

Ricardo was the first economist to make extensive use of deductive reasoning and arithmetical models to illustrate the anticipated reactions to juxtaposed market forces and responsive human action. His modes of analysis have become identified with economics as an academic discipline.

Like Smith, Ricardo believed that minimal government intervention best served an economy. His contributions to economics are numerous and include the theory of “hard money” to hedge inflation, the law of diminishing returns, developed along with his close friend the classical economist T. R. Malthus, and the labor theory of value.

One of Ricardo’s most significant contributions to economics is the law of comparative advantage as applied to international commerce, which grew out of Adam Smith’s division of labor and has become the central argument for free trade and open markets. - [Źródło 2012.09.14]

Eiffel was not a studious child, and thought his classes at the Lycée Royal in Dijon boring and a waste of time, although in his last two years, influenced by his teachers for history and literature, he began to study seriously, so that he managed to gain his baccalauréats in humanities and science. An important part in his education was played by his uncle, Jean-Baptiste Mollerat, who had invented a process for distilling vinegar and had a large chemical works near Dijon, and one of his uncle's friends, the chemist Michel Perret. Both men spent a lot of time with the young Eiffel, teaching him about everything from chemistry and mining to theology and philosophy.

Eiffel went on to attend the Collège Sainte-Barbe in Paris, in order to prepare for the difficult entrance exams set by the most important engineering colleges in France. Eiffel had hoped to enter the École Polytechnique, but his tutors decided that his performance was not good enough, and instead he qualified for entry to the École Centrale des Arts et Manufactures in Paris, which offered a rather more vocational training

"Libraries raised me. I don’t believe in colleges and universities. I believe in libraries because most students don’t have any money. When I graduated from high school, it was during the Depression and we had no money. I couldn’t go to college, so I went to the library three days a week for 10 years." - Ray Bradbury

After dropping out of Sonora High School, he went to further his secondary education at Brea Olinda High School. After graduating, he worked several jobs such as truck driving and wrote when he had time. During this period he taught himself about special effects: "I'd go down to the USC library and pull any thesis that graduate students had written about optical printing, or front screen projection, or dye transfers, anything that related to film technology. That way I could sit down and read it, and if they'd let me photocopy it, I would. If not, I'd make notes."

When he was eighteen, his mother died and his father's health began to fail. Watt travelled to London to study instrument-making for a year, then returned to Scotland, settling in the major commercial city of Glasgow intent on setting up his own instrument-making business.

Both brothers attended high school, but did not receive diplomas.