The nature of Economic Thought

[Front Matter and Title Page]: The title page and publication details for 'The Nature of Economic Thought' by G.L.S. Shackle, including publisher information and library cataloging data. [Table of Contents]: A comprehensive table of contents listing the five parts of the book: The Meaning and Method of Economics, Decision versus Determinism, Business and Psychology, Resources and Demands, and Interest and Investment. [Critical Reflections and Preface]: The author introduces economics as the logic of choice, emphasizing that choice occurs among imagined future outcomes rather than objective realities. He critiques the traditional economic assumption of listable contingencies and perfect foresight, arguing instead for a theory rooted in imagination and radical uncertainty. The preface outlines the book's structure, covering the meaning of economics, decision versus determinism, business psychology, and the role of interest rates as a link between present facts and future conjectures. [Acknowledgements and Part I: The Unity of European Economic Thought]: Shackle explores the role of economic theory as a system of explanation that renders unprecedented events familiar. He argues that a shared economic theory is essential for international cooperation and peace. He critiques the concept of 'efficiency' when applied to different political systems and examines the shift from the Walrasian general equilibrium model to Keynesian macroeconomics. The essay addresses the limitations of economic prognosis and the impact of electronic computers on the belief in a deterministic economic cosmos. [Chapter 2: The Hedgehog and the Fox]: Using the metaphor of the hedgehog and the fox, Shackle discusses the fragmentation of economic theory since the 1920s. He argues that a unified 'Principles' is difficult to write because different models rest on incompatible assumptions about time and knowledge. He contrasts the 'timeless' equilibrium models with 'expectational' models where decision is a creative, non-deterministic act. The essay categorizes economic models along three axes: mechanical, evolutionary, and expectational time. [Chapter 3: Keynes and the Nature of Human Affairs]: Shackle analyzes the evolution of Keynes's thought from probability to money and employment. He argues that Keynes's central contribution was integrating 'insecurity' into the study of scarcity. The essay explains the mechanics of the multiplier, the role of liquidity preference in causing unemployment, and how uncertainty prevents the interest rate from automatically equilibrating saving and investment. Shackle defends Keynes against puritanical critiques of 'thrift' by highlighting the paradox of saving in a depressed economy. [Chapter 4: The Ruin of Economy]: This chapter chronicles the 'disintegration' of classical economic theory over the mid-20th century. Shackle traces the breakdown of the perfect competition model through the work of Sraffa, Robinson, and Chamberlin, and the subsequent Keynesian revolution. He discusses the rise of econometrics and mathematical tools like the Leontief matrix and Game Theory. The essay concludes with a list of ten fundamental questions every economics student should master, ranging from value theory to international trade and political finance. [Chapter 5: The 'Great Theory' in Eclipse]: Shackle reflects on the 'Periclean glory' of economic theory at the turn of the 20th century, dominated by Marshall and Pareto. He explains how the 'Great Theory' of general equilibrium was eclipsed by the realization that increasing returns are incompatible with perfect competition. He highlights the bridge Keynes built between academic theory and political action, emphasizing that the scarcity of 'means of judging consequences' is as vital as material scarcity. [Chapter 6: Time, Nature and Decision]: Shackle presents a philosophical investigation into the nature of decision-making. He argues that in a deterministic world, decision is illusory; in a world of certainty, it is empty; and in a world of chaos, it is powerless. He defines decision as choice in face of 'bounded uncertainty.' He introduces the concept of the 'solitary present' and argues that choice is made among imagined future experiences (anticipation). He concludes that while short-term 'inertial' dynamics are possible, true decision-making makes history unpredictable. [Chapter 7: The Description of Uncertainty]: Shackle develops a formal model for describing uncertainty that rejects distributive probability in favor of 'potential surprise.' He argues that because the list of future contingencies is never complete, probability is an inappropriate measure for creative decision. He introduces the 'possibility curve' and the 'ascendancy' function, which identifies 'focus outcomes' (the most interesting possible gain and loss). These focus outcomes are then used on an indifference map to analyze how individuals choose between risky investments. [Chapter 8: Decision and Uncertainty]: A concise restatement of Shackle's theory of decision-making. He emphasizes that creative decision requires a 'gap' in the future that the decision-maker fills with imagination. He contrasts objective probability (knowledge) with subjective probability (ignorance) and argues for a non-distributive uncertainty variable based on the degree of disbelief or potential surprise. The chapter concludes by defining 'focus elements' as the core of the act of decision. [Chapter 9: The Dilemma of History]: Shackle addresses the logical problem of constructing a non-determinist theory of history. He argues that if history is fully structured, decision is passive; if it is unstructured, decision is powerless. He proposes that human 'inspiration' and the imaginative creation of outcomes provide the necessary 'essential novelty.' He reiterates the failure of distributive probability to account for the 'residual hypothesis' (the 'something else' that might happen) and advocates for his potential surprise model. [Chapter 10: Models of Conjecture]: Shackle reviews Bertrand de Jouvenel's work on 'Prévision,' focusing on the concepts of the 'casuel' (unforeseeable detail) and the 'deformation of the social space' (structural change). Shackle introduces his own concept of the 'rig'—the set of tensions in a society that can be released by a spark. He argues that while we can study the 'rig' to see what *can* happen, we cannot predict *when* an explosion will occur. He concludes that the radical 'deformation' is paradoxically more foreseeable than the minor 'casuel' event. [Chapter 11: Brief Testament]: A short summary of Shackle's core philosophy regarding time and uncertainty. He defines the 'solitary moment of actuality' as the only reality for the individual and explains that the 'uncertainty gap' must be creatively filled by imagination. He restates the role of potential surprise in identifying focus outcomes for decision-making. [Chapter 12: The Economist's Model of Man]: Shackle critiques the 'Model T' economic man—a creature of perfect knowledge and static equilibrium. He contrasts this with 'Keynesian man,' who possesses imagination, hopes, and fears. He calls for a closer collaboration between economists and psychologists to understand how expectations are formed and how 'liquidity preference' acts as a 'tranquillizer' against uncertainty. He mentions the work of G.P. Meredith and Kenneth Boulding as promising steps toward a psychological analysis of economic behavior. [Chapter 13: Theory and the Business Man]: Shackle examines the gap between economic theory and business practice, particularly regarding investment. He argues that business men use a 'horizon' (often 2-5 years) to cope with uncertainty, rather than the long-term discounting suggested by textbooks. He explains the 'multiplier' effect and demonstrates mathematically why interest rate changes have little leverage on short-term investment decisions. The chapter emphasizes that uncertainty is not a hurdle to be overcome but the very condition that allows for imagination and hope. [Chapter 14: Business Men on Business Decisions]: Shackle reports on an empirical experiment conducted with business men on Merseyside. He used a questionnaire to test theoretical assumptions about profit maximization, pricing (marginal revenue vs. full cost), and investment criteria. The results suggest that business men prioritize long-term prestige and goodwill over short-term profit, and that they rely on 'pay-back' periods (e.g., 5 years) for investment rather than actuarial discounting. The chapter includes detailed tables of the survey results. [Chapter 14 Appendix and Chapter 15: Business and Uncertainty]: This segment contains the tabulated results of the Merseyside business survey and an essay on the strategic importance of investment. Shackle explains that full employment depends on the 'saving gap' being filled by investment. He discusses the 'uncertainty horizon'—the practice of only counting on profits for a few years—and how this aligns with high required rates of return. He suggests that business men privately weigh 'best-case' profits against 'worst-case' losses that could ruin the firm. [Chapter 16: Scale, Risk and Profit]: Shackle provides a technical analysis of how the scale of a plant is determined under uncertainty. He introduces the 'scale-opportunity curve' and uses indifference maps to show how an investor's temperament and fortune limit the size of a venture. He explores the effects of borrowing at fixed interest ('gearing'), noting that it can increase both profit hopes and the risk of total disaster. The chapter resolves the paradox of why firms in perfect competition do not expand indefinitely by pointing to the limiting effect of risk. [Chapter 17: Resources and Demands]: Shackle discusses the fundamental economic problem of allocating limited resources to unlimited demands. He describes the market as a 'computer' that uses price as its language to coordinate specialized production. He explains the dual nature of money as both a unit of account and a 'medium of postponement.' The essay details how bank credit creation can lead to inflation and how the mismatch between intended saving and intended investment causes economic fluctuations. He concludes that money is an 'elastic rope' that can be manipulated, often to the detriment of society. [The Nature of Inflation: Definition and Measurement]: Shackle defines inflation as a rise in the general price level or a fall in the value of money. He argues that there is no uniquely valid way to measure inflation because different 'baskets of goods' yield different ratios, making precise percentages logically incapable of universal agreement. [The Quantity Theory of Money and Velocity of Circulation]: This section explores the origins of the word 'inflation' and the Quantity Theory of Money. Shackle defines the quantity of money (M) and the velocity of circulation (V), explaining the Quantity Equation (MV = PT) as a traditional explanation for price level movements. [Critique of the Quantity Theory and Historical Evidence]: Shackle critiques the crude Quantity Theory, noting that historical data from Great Britain shows the velocity of circulation is far from constant. He argues that rigid limitation of the money stock could trigger violent trade cycles and suggests moving toward a Keynesian or Wicksellian alternative. [Keynes's Theory of the General Price Level and Output]: Shackle explains Keynes's view of the price level through the lens of production costs. Using a basin analogy, he describes how increasing output with a fixed frame of equipment leads to diminishing returns and rising money costs per unit, especially in the 'short period'. [Effective Demand and the Components of Output]: Shackle details how total demand is broken down into consumption, export, investment, and government demand. He explains the concept of 'depression equilibrium' where falling incomes eventually arrest the decline of effective demand, and introduces 'unintended investment' as a balancing item. [Consumption, Saving, and the Welfare State]: Shackle discusses the relationship between disposable income, consumption, and saving. He explains how the Welfare State increases aggregate consumption by redistributing income from high-savers (the rich) to high-spenders (the poor), thereby altering the post-war employment landscape. [The Determinants of Investment and Interest Rates]: Shackle examines why business investment is often insensitive to interest rate changes compared to housing. He argues that for complex machinery, the uncertainty of the distant future makes business men focus on short-term yields (2-5 years), where interest rate fluctuations have minimal impact on 'present value'. [Post-War Inflationary Pressures and Structural Changes]: Shackle contrasts the 1930s 'gap' with the post-war reality where demand from exports, investment, and government spending exceeds full-employment output. He notes significant increases in the standard of living and government's share of national output (rising from 1/7 to 1/5) as primary drivers of inflation. [The Social and Economic Consequences of Inflation]: Shackle analyzes the 'walking' inflation of the mid-20th century, highlighting the injustice it inflicts on holders of fixed-interest securities and the professional classes. He discusses the 'money illusion' and how inflation leads to industrial unrest and export difficulties. [Halting Inflation: Monetary, Fiscal, and Regimentary Policy]: Shackle evaluates methods to halt inflation, rejecting 'regimentary' controls (rationing) in favor of monetary and fiscal policies. He supports using higher interest rates to focus resources on immediate consumer needs and praises efforts to reduce government spending and tax penalties on productive effort. [Interest and Investment: Recent Theories]: This section introduces a survey of post-1945 theories regarding interest rates. It outlines three main lines of debate: the defense/criticism of Keynes, the stock vs. flow analysis, and the effectiveness of interest as a regulator of national wealth growth. [Types of Economic Theory: Equilibrium, Choice, and Money]: Shackle classifies economic theories into three primary dichotomies: equilibrium versus development, pure versus impure choice, and states versus events. He argues that equilibrium serves as a powerful selective test for economists, while the distinction between pure and impure choice determines whether money is treated merely as a unit of account or as a store of value. Finally, he distinguishes between long-period equilibrium (states) and short-period equilibrium (events), noting that Keynes's method was essentially an equilibrium theory despite its revolutionary conclusions. [Keynes and the Classics: Patinkin's Critique and the Neutrality of Money]: This section examines the conflict between Don Patinkin's long-period equilibrium analysis and Keynes's short-period analysis of uncertainty. Shackle explains Patinkin's 'real balance effect,' which argues that in the long run, changes in the money stock are neutral and do not affect the interest rate, provided there is no money illusion. He contrasts this with Keynes's focus on the speculative motive and the role of 'Bears' and 'Bulls' in determining interest rates through liquidity preference in a world of uncertainty. [Hicks's Rehabilitation of Classical Economics and the Wage Flexibility Debate]: Shackle reviews J.R. Hicks's analysis of Patinkin and the 'classical' system. Hicks identifies downward wage flexibility as the core difference between classical and Keynesian models. The section also explores F.H. Hahn's critique of Modigliani, focusing on the tension between Say's Law and Walras's Law in a monetary economy. Shackle argues that the 'real' and 'money' systems are only independent if one assumes perfect flexibility and the absence of speculative liquidity motives. [Stock versus Flow Analysis in Interest Theory]: Shackle delves into the methodological debate over whether interest rates are determined by stocks (existing assets) or flows (new issues and savings). He discusses Karl Brunner's assertion that the bond market is dominated by stock relations due to the volume of existing securities relative to new issues. The section also covers Llewellyn Wright's 'sequence analysis' and Cliff Lloyd's argument that stock-flow goods require two excess demand equations, suggesting that the equivalence of liquidity preference and loanable funds theories remains a complex, potentially unsolved problem. [Dynamic and Dramatic Models: Keynes, Robinson, and the Inducement to Invest]: The final section of this chunk explores the 'dramatic' nature of Keynesian economics as interpreted by Joan Robinson and others. Shackle defends Keynes's use of comparative statics to describe 'earthquake economics,' arguing that his method simplifies complex psychological factors into autonomous concepts like the inducement to invest. He also reviews Kenneth Boulding's subjective view of interest and various special contributions regarding the banking system's power to lend, the velocity of real balances, and the distinction between interest and profit. [The Investment Horizon and the Role of Interest]: Shackle examines the formal role of interest rates in profitability calculations, specifically how they function as a denominator in discounting deferred profit instalments. He explores the equilibrium between the marginal efficiency of capital and loan interest rates, noting that investment demand for durable goods is theoretically sensitive to interest rate changes, though this depends on the subjective demand prices of individual investors. [Depreciation, Amortization, and the Pay-off Period Debate]: This section critiques the inclusion of book-keeping conventions like depreciation and amortization in fundamental investment theory. It reviews the debate between Brockie, Grey, and White regarding the 'pay-off period' method used by firms, arguing that while short planning horizons (2-3 years) make investment insensitive to interest rates, such caution is a rational response to uncertainty rather than 'unscientific' planning. [Uncertainty and the Powerlessness of Interest Rates]: Shackle demonstrates through arithmetic examples that interest rate changes have negligible effects on short-term investment projects (near-horizon equipment) due to the dominance of uncertainty and the high required rates of return. Conversely, he explains that interest rates exert powerful leverage over long-term assets like housing, where the greatest absolute change in present value occurs at a deferment equal to the reciprocal of the interest rate. [Harrodian Dynamics and the Nature of Interest]: Shackle examines Sir Roy Harrod's dynamic models, contrasting Keynes's short-period focus with Harrod's concern for long-period growth and the 'real' forces of thrift and productivity. He critiques the meaningfulness of intertemporal utility comparisons, arguing that individuals cannot stand outside their immediate present to make objective comparisons across time. The section concludes by highlighting the paradoxical nature of interest as a central theoretical pillar that often fails to demonstrate clear empirical influence on saving or investment. [Critical Reflections: Review of Nicholas Kaldor's Essays]: A review of Nicholas Kaldor's collected essays on value, distribution, stability, and growth. Shackle reflects on the intellectual atmosphere of the London School of Economics in the 1930s and discusses the evolution of economic debates, including imperfect competition, the New Welfare Economics, and the Austrian theory of capital. He emphasizes the role of Keynes as a charismatic force who unified various streams of economic thought and praises Kaldor's virtuosity in developing trade-cycle models and comparing Marxian and Keynesian systems. [The Stages of Economic Growth: A Review of W. W. Rostow]: Shackle reviews W. W. Rostow's 'The Stages of Economic Growth', analyzing Rostow's attempt to generalize modern history into a set of stages. While acknowledging the brilliance of the 'take-off' concept, Shackle critiques the lack of precise mechanism in Rostow's theory, particularly regarding the origins of the first industrial revolution in Britain and the essential role of agricultural productivity in supporting industrialization. [Values and Intentions: A Review of J. N. Findlay]: Shackle reviews J. N. Findlay's philosophical work on values and intentions, finding deep parallels between Findlay's 'looser logic' of thought-transitions and his own theories of economic expectation. The discussion covers the nature of belief, the distinction between the sage's tranquil theory-choice and the actor's urgent decision, and the fundamental philosophical dilemma between universal causation and human freedom. Shackle argues that for decision to be meaningful, it must be an ultimate source of novelty in history. [Index]: A comprehensive alphabetical index of terms, concepts, and authors mentioned throughout the work, ranging from 'accelerator' to 'Zottmann'.