How Cowles Discussion Papers Shaped Modern Economics

Prior to working papers, circulating research drafts in academia was limited to informal individual exchanges or annual reports.

The academic journal review process, then as now, involved significant time lags. When Cowles director Jacob Marshack oversaw the initiation of a discussion paper series in 1947, it was explicitly designed to bypass these delays and to "solicit comments and attention" while the work was still in progress. 

The timing was right, many professors who had taken leave to help with the war effort were returning to their research. The discussion papers facilitated peer scrutiny and allow the community of scholars to rapidly build on new advances. The discussion papers did not merely preview research; they functioned as an incubator for seminal contributions. 

One of the clearest demonstrations of the series’ influence is found in the early work of Kenneth Arrow. Today, Arrow’s “Impossibility Theorem” is recognized as a cornerstone of economic theory and political science. Long before the theorem appeared in his 1951 monograph Social Choice and Individual Values, its core arguments were developed, refined, and publicly circulated through Cowles Discussion Papers.

Similarly, the Cowles environment nurtured breakthroughs in simultaneous-equations econometrics developed by Tjalling Koopmans, Lawrence Klein, and their collaborators. Because these papers were circulated widely while the ideas were still forming, there was rapid methodological standardization within the profession.

From 1947 to 1955, the discussion papers were split into three categories: Math, Economics and Statistics and they were called “Cowles Commission Discussion Papers.” After the move to Yale, the series consolidated and called “Cowles Foundation Discussion Papers.” Most Cowles Foundation Discussion Papers (CFDPs) are eventually accepted as journal articles. The Cowles Foundation Papers (CFP) series reprints journal articles written by Cowles affiliated researchers.

In 1954, economist Kenneth Boulding said that “no economist anywhere in the world can afford to remain completely ignorant of the ferment of ideas, the new research techniques and new points of view which are constantly proceeding from the activities” of the Cowles Commission.

“At Cowles, ideas were disseminated through discussion papers, which were mimeographed, circulated within and outside the commission, and discussed in seminars and special staff meetings.” - Measuring Utility: From the Marginal Revolution to Behavioral Economics, Ivan Moscati

Indeed, 28 Nobel Laureates have contributed papers to the Cowles Foundation Discussion Paper Series. 

Famous Papers

Many of the 20th century’s most influential economics papers were first shared as Cowles Discussion Papers. CFDPs are the rough drafts of the ideas that define modern life. Below is a look at the specific, concrete legacies born within these archives.

Tjalling C. Koopmans (1948): "Optimum Utilization of the Transportation System" The basis for Koopmans’s 1975 Nobel Prize; it transformed the "Transportation Problem" into the foundational science of linear programming.

Kenneth J. Arrow (1949): "Social Choice and Individual Values" This draft grew into the 1951 book of the same name, cited by the Nobel Committee in Arrow’s 1972 Nobel Prize for proving the "Impossibility Theorem."

Harry Markowitz (1950): "Towards a Theory of Financial Behavior" The musings in this paper led to the 1990 Nobel Prize for creating Modern Portfolio Theory; the reason why index funds and diversified portfolios are standard vehicles for investing.

Herbert Simon (1950): "A Formal Theory of the Employment Relationship" Simon’s exploration of organizational authority was central to his 1978 Nobel Prize for bounded rationality and the reality described in his classic book, Administrative Behavior.

Arrow & Debreu (1954): "Existence of an Equilibrium for a Competitive Economy" Arguably the most technically significant paper in economic history, this work secured the Nobel Prizes for both Arrow (1972) and Debreu (1983) by providing the first rigorous proof that Adam Smith’s "invisible hand" could actually function in a complex mathematical reality.

James Tobin (1956): "Liquidity Preference as Behavior Towards Risk" This paper provided the primary justification for Tobin’s 1981 Nobel Prize, introducing the "Tobin Model" of money demand that central banks use to this day to manage interest rates and control inflation.

William D. Nordhaus (1976): "Economic Growth and Climate: The Carbon Dioxide Problem" Nordhaus was awarded the 2018 Nobel Prize for the work started here; this document established the 2°C warming limit as a global benchmark and invented the "Social Cost of Carbon," the actual dollar value used by the EPA to calculate the impact of environmental policy.

John Y. Campbell and Robert J. Shiller (1988): "Stock Prices, Earnings, and Expected Dividends" This research was a pillar of Shiller’s 2013 Nobel Prize, establishing the CAPE (Cyclically Adjusted Price-to-Earnings) ratio which investors and firms use to predict long-term market crashes and valuation cycles.

Karl E. Case & Robert J. Shiller (1987): "Prices of Single Family Homes Since 1970: New Indexes for Four Cities" The methodology incubated here created the S&P CoreLogic Case-Shiller Index, the world’s most cited measure of housing markets, which fundamentally changed how the Federal Reserve and mortgage lenders assess real estate risk.

Peter C. B. Phillips (1985): "Time Series Regression with a Unit Root" This paper established the Phillips-Perron test, the ubiquitous tool that every professional econometrician uses to ensure their data isn't producing "spurious" results.

Donald W. K. Andrews (1990): "Tests for Parameter Instability and Structural Change with Unknown Change Point" Andrews developed the global standard for detecting "structural breaks" in data; it is the primary tool used to identify exactly when a stable economic relationship has permanently shifted.

From 1947 to 1955, the discussion papers were split into three categories: Math, Economics and Statistics and they were called “Cowles Commission Discussion Papers.” After the move to Yale, the series consolidated and called “Cowles Foundation Discussion Papers.”