Noun
marginalism (countable and uncountable, plural marginalisms)
(economics) The use of marginal analysis to solve large classes of microeconomic problems.
The Adam Smith Theatre in Kirkcaldy The body of theory later termed "neoclassical economics" or " marginalism " formed from about 1870 to 1910. Source: Internet
Marginalism and psychophysics Unlike other historicists, Weber also accepted the marginal theory of value (also called "marginalism") and taught it to his students. Source: Internet