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Debreu, Gerard

(Encyclopedia)Debreu, Gerard dəbro͞oˈ [key], 1921–2005, French-American economist, b. Calais, France. He studied mathematics in France before coming to the United States in 1950, where he worked with the Chica...

Galiani, Ferdinando

(Encyclopedia)Galiani, Ferdinando fārdēnänˈdō gälyäˈnē [key], 1728–87, Italian economist, educated for the church. As a very young man he wrote Della moneta [on money] (1750), which attacked the mercanti...

Heaviside, Oliver

(Encyclopedia)Heaviside, Oliver hĕvˈēsīdˌ [key], 1850–1925, English physicist. He did valuable work in telephony and in the theory of electrical conduction in cables and other areas of electric theory. He su...

Bridges, Calvin Blackman

(Encyclopedia)Bridges, Calvin Blackman, 1889–1938, American geneticist, b. Schuyler Falls, N.Y., grad. Columbia (B.S., 1912; Ph.D., 1916). In his research he collaborated with T. H. Morgan, A. H. Sturtevant, and ...

value, in economics

(Encyclopedia)value, in economics, worth of a commodity in terms of other commodities, or in terms of money (see price). Value depends on both desirability and scarcity. The marginal theory of value, pioneered in t...

complementarity principle

(Encyclopedia)complementarity principle, physical principle enunciated by Niels Bohr in 1928 stating that certain physical concepts are complementary. If two concepts are complementary, an experiment that clearly i...

Yukawa, Hideki

(Encyclopedia)Yukawa, Hideki hēˈdĕkē yo͞okäˈwä [key], 1907–81, Japanese physicist, grad. Kyoto Univ., 1929, Ph.D. Osaka Univ., 1938. He was professor of physics at Kyoto Univ. from 1939 to 1970. He receiv...

Cauchy, Augustin Louis, Baron

(Encyclopedia)Cauchy, Augustin Louis, Baron ōgüstăNˈ lwē bärôNˈ kōshēˈ [key], 1789–1857, French mathematician. He was professor simultaneously (1816–30) at the École polytechnique, the Sorbonne, and...

business cycles

(Encyclopedia)business cycles, fluctuations in economic activity characterized by periods of rising and falling fiscal health. During a business cycle, an economy grows, reaches a peak, and then begins a downturn f...

Mills, Charles Wade

(Encyclopedia)Mills, Charles W., 1951–2021, philosopher and political theorist, b. London, Ph.D. University of Toronto, 1985. Born in the U.K. and raised in Jamaica...