Question: The Marshallian demand function was named after an economist known as one of the founders of what?
Context: In microeconomics, a consumer's Marshallian demand function (named after Alfred Marshall) specifies what the consumer would buy in each price and income or wealth situation, assuming it perfectly solves the utility maximization problem.  Marshallian demand is sometimes called Walrasian demand (named after Léon Walras) or uncompensated demand function instead, because the original Marshallian analysis refused wealth effects. In economics, a conditional factor demand is the cost-minimizing level of an input (factor of production) such as labor or capital, required to produce a given level of output, for given unit input costs (wage rate and rental rate) of the input factors.  A conditional factor demand function expresses the conditional factor demand as a function of the output level and the input costs.  The conditional portion of this phrase refers to the fact that this function is conditional on a given level of output, so output is one argument of the function.  Typically this concept arises in a long run context in which both labor and capital usage are choosable by the firm, so a single optimization gives rise to conditional factor demands for each of labor and capital. A regular economy is an economy characterized by an excess demand function which has the property that its slope at any equilibrium price vector is non-zero.  In other words, if we graph the excess demand function against prices, then the excess demand function "cuts" the x-axis assuring that each equilibrium is locally unique.  Local uniqueness in turn permits the use of comparative statics - an analysis of how the economy responds to external shocks - as long as these shocks are not too large. In microeconomics, an excess demand function is a function expressing excess demand for a product—the excess of quantity demanded over quantity supplied—in terms of the product's price and possibly other determinants.  It is the product's demand function minus its supply function.  In a pure exchange economy, the excess demand is the sum of all agents' demands minus the sum of all agents' initial endowments. In economics, an 'inverse demand function', P = f(Q), is a function that maps the quantity of output demanded to the market price (dependent variable) for that output.  Quantity demanded, Q, is a function of price; the inverse demand function treats price as a function of quantity demanded, and is also called the price function.  Note that the inverse demand function is not the reciprocal of the demand function—the word "inverse" refers to the mathematical concept of an inverse function. In microeconomics, a consumer's Hicksian demand correspondence is the demand of a consumer over a bundle of goods that minimizes their expenditure while delivering a fixed level of utility.  If the correspondence is actually a function, it is referred to as the Hicksian demand function, or compensated demand function.  The function is named after John Hicks. Roy's identity (named for French economist René Roy) is a major result in microeconomics having applications in consumer choice and the theory of the firm.  The lemma relates the ordinary (Marshallian) demand function to the derivatives of the indirect utility function.  Specifically, where formula_1 is the indirect utility function, then the Marshallian demand function for good formula_2 can be calculated as: Sir John Richard Hicks (8 April 1904 – 20 May 1989) was a British economist.  He was considered one of the most important and influential economists of the twentieth century.  The most familiar of his many contributions in the field of economics were his statement of consumer demand theory in microeconomics, and the IS/LM model (1937), which summarised a Keynesian view of macroeconomics.  His book "Value and Capital" (1939) significantly extended general-equilibrium and value theory.  The compensated demand function is named the Hicksian demand function in memory of him. In Keynesian Economics, the principle of effective demand is the principle that the aggregate demand function and the aggregate supply function intersect each other at the point of effective demand generally entailing under-employment and under-capacity utilization.  That is to say, "demand creates its own supply" in contrast to the Say's law which insists "supply creates its own demand".  According to the principle of effective demand, the aggregate demand determines the level of output and employment in a country.  "Principle of effective demand" is the title of chapter 3 of Keynes's "General theory". Alfred Marshall (26 July 1842 – 13 July 1924) was one of the most influential economists of his time.  His book, "Principles of Economics" (1890), was the dominant economic textbook in England for many years.  It brings the ideas of supply and demand, marginal utility, and costs of production into a coherent whole.  He is known as one of the founders of neoclassical economics.  Although Marshall took economics to a more mathematically rigorous level, he did not want mathematics to overshadow economics and thus make economics irrelevant to the layman.
Answer: neoclassical economics