Key Concepts and Figures - Quant Green Book

Key Figures

Thomas Hobbes: English philosopher who compared money to the "blood" of the commonwealth, emphasizing the state's absolute authority over currency.
John Locke: Philosopher and early proponent of the Quantity Theory of Money, arguing that expanding the money supply without expanding goods causes inflation, functioning as a hidden tax.
Alexander Hamilton: First U.S. Secretary of the Treasury; advocated for a national bank, assumption of state debts, and tariffs to protect domestic manufacturing.
Thomas Paine: Author of Agrarian Justice; proposed taxing landowners (a land value tax) to fund a universal citizen's dividend and old-age pension.
Adam Smith: Father of modern economics; argued that the "invisible hand" of self-interest in a free market efficiently coordinates society's resources.
David Ricardo: Formalized classical economics; proved that comparative advantage makes free trade beneficial even if one country is more efficient at producing everything.
Thomas Malthus: Warned that human populations grow geometrically while food grows arithmetically, inevitably leading to famine; debated Ricardo on the danger of "general gluts."
Pierre-Joseph Proudhon: French philosopher who founded Mutualism and famously declared "Property is theft!", advocating for free-market anti-capitalism and worker cooperatives.
Karl Marx: Heterodox economist who argued that only labor creates value (Labour Theory of Value) and that capitalism's inherent contradictions would lead to its collapse.
John Maynard Keynes: Revolutionized macroeconomics; argued that aggregate demand drives the economy, markets do not automatically self-correct, and government stimulus is necessary during deep recessions.
Milton Friedman: Leader of the Chicago School and Monetarism; argued that inflation is always a monetary phenomenon and that the Federal Reserve, not capitalism, caused the Great Depression.
Friedrich Hayek: Austrian-British economist who argued that prices act as an information signaling network that central planners cannot replicate; warned against government intervention.
Hyman Minsky: Developed the Financial Instability Hypothesis, arguing that long periods of stability breed complacency and dangerous leverage, leading to inevitable crashes ("Minsky moments").
Irving Fisher: Developed the Debt-Deflation Theory, explaining how forced selling during a panic lowers asset prices, paradoxically increasing the real burden of remaining debt.
John Kenneth Galbraith: Documented the psychology of the 1929 crash; coined "the bezzle" to describe the hidden buildup of fraud during economic booms.
Joseph de la Vega: Wrote the first book on stock market trading in 1688, accurately describing options, short selling, and market manipulation centuries before modern finance.
Charles Mackay: Journalist who documented mass irrationality in his 1841 book, detailing the Tulip Mania and South Sea Bubble to warn future generations.
Charles Kindleberger: Synthesized historical market crashes into a universal five-stage bubble model: Displacement, Boom, Euphoria, Distress, and Revulsion.
Ronald Coase: Nobel laureate who established the Theory of the Firm (transaction costs) and the Coase Theorem regarding the efficient negotiation of negative externalities.

Key Terms

Mercantilism: The dominant pre-classical economic theory that viewed global wealth as a zero-sum game, prioritizing the hoarding of gold and the aggressive pursuit of trade surpluses.
Invisible Hand: The unobservable market force that helps the demand and supply of goods in a free market reach equilibrium automatically.
Comparative Advantage: The principle that entities should specialize in producing goods for which they have the lowest opportunity cost, making trade mutually beneficial.
Say's Law: The classical economic theory that "supply creates its own demand," implying general overproduction is impossible.
Aggregate Demand: The total demand for all goods and services in an economy at a given time and price level.
Paradox of Thrift: The Keynesian concept that if everyone tries to save more money during a recession, aggregate demand falls, causing total savings and economic growth to actually decline.
Animal Spirits: The human emotion, gut instinct, and herd psychology that drive consumer and investor behavior, independent of rational calculation.
Liquidity Trap: A situation where interest rates are zero but people are too fearful to borrow, rendering central bank monetary policy ineffective.
Multiplier Effect: The idea that a single dollar of government spending stimulates more than one dollar of total economic output as it circulates through the economy.
Quantity Theory of Money (MV = PQ): The theory that the general price level of goods is directly proportional to the amount of money in circulation.
Natural Rate of Unemployment (NAIRU): The theoretical minimum level of unemployment an economy can sustain without causing inflation to continually accelerate.
Financial Instability Hypothesis: Minsky's theory that stability leads to increasing leverage (hedge (\to) speculative (\to) Ponzi finance), eventually resulting in a crisis.
Minsky Moment: The sudden, major collapse of asset values occurring when a highly leveraged market exhausts its Ponzi finance phase and everyone tries to sell at once.
Debt-Deflation Spiral: A self-reinforcing downward cycle where distressed selling lowers prices, increasing the real value of debts, leading to more defaults and more selling.
The Bezzle: The undisclosed inventory of embezzlement and corporate fraud that accumulates during a boom and makes the subsequent crash more severe.
Beauty Contest Model: Keynes's analogy that investing is about guessing what the crowd thinks is valuable, rather than judging the underlying asset's true value.
Mutualism: A free-market socialist theory based on the labor theory of value, advocating for free credit, labor notes, and worker cooperatives instead of capitalist wage labor.
Transaction Costs: The costs of participating in a market (finding suppliers, negotiating contracts), which Coase argued is the reason firms exist to organize production internally.
Coase Theorem: The theory that if property rights are perfectly defined and transaction costs are zero, private parties can negotiate an efficient solution to negative externalities without government intervention.
Modern Monetary Theory (MMT): A heterodox macroeconomic framework arguing that sovereign currency issuers cannot go bankrupt, so the only real limit to government spending is inflation, not tax revenue.
Land Value Tax: A tax on the unimproved value of land, proposed early on by Thomas Paine to fund a universal citizen's dividend because the earth is the "common property of the human race."