New Classical Economics

New Classical Economics is defined as a macroeconomic approach that assumes individuals make decisions based on rational expectations and that markets are characterized by perfect competition and continuous clearing. This theory, built on microeconomic foundations, argues that economic fluctuations arise in response to supply and demand shocks. In the late 2000s, New Classical economists seeking to challenge these claims aimed to bring significant changes to the history of economic thought. New Classical Economics is an important school in macroeconomic analysis that emerged in the late 1970s and early 1980s. It was developed primarily by economists such as John Muth, Robert Lucas Jr., Thomas Sargent, and Robert Barro, who proposed a macroeconomic modeling approach grounded in microeconomic principles.

The Emergence of New Classical Economics

By the 1960s, the problems of capitalism had evolved into a very different context compared to the 1930s when Keynes developed his theory. The post-World War II years are known as the golden age of capitalism. These were years of low unemployment and steady growth. However, in the 1960s, advanced capitalist economies began to show a new phenomenon: stagflation.

By the 1970s, growth had slowed, unemployment had risen, and inflation had accelerated. Economists struggling to explain rising unemployment and inflation sought new methods. In this context, a counter-movement gained strength in the 1970s against the Keynesian view that a capitalist economy could not automatically reach full employment and required active policy intervention. This development, known as New Classical Economics and essentially a revival of the Classical model within a new framework, centered around the rational expectations literature.

New Classical Economics is an important school in macroeconomic analysis that emerged in the late 1970s and early 1980s. It was developed primarily by economists such as John Muth, Robert Lucas Jr., Thomas Sargent, and Robert Barro, who proposed a macroeconomic modeling approach grounded in microeconomic principles.

New Classical Economics assumes that markets are generally efficient and that economic agents (individuals, firms, etc.) are rational. These economic agents strive to optimize their expectations and decisions about the future. Consequently, in this model, the power of external factors such as unexpected shocks and policy changes to affect the economy is limited.

New Classical Economics, particularly through its theoretical and methodological framework, offers a more microeconomic focus than Keynesian economics. This school emphasizes the importance of price flexibility and market adjustment mechanisms. Furthermore, when analyzing the effects of economic policies in the short run, it argues that responses in the long run are predictable.

New Classical economists who believe in market economies argue that macroeconomic problems will not occur as long as prices are flexible and there is no government intervention in the economy. The most important contribution of New Classical Economics to economic literature, as mentioned above, is the Rational Expectations Hypothesis. According to this hypothesis, decision-making units in the economy (firms, households, individuals, workers, etc.) consider all available information—past, current, and future—when making decisions and forecasts, and they act rationally. Therefore, they exhibit behavior that neutralizes the impact of applied economic policies. For example, economic units anticipating an inflationary policy immediately shift toward financial instruments such as foreign currency to protect their purchasing power, demand immediate wage increases, and may render the policy ineffective. In this situation, the only way governments can achieve success in economic policy is by implementing policies that surprise economic agents.

Monetarism and New Classical Economics gained general acceptance from the 1980s until the Global Financial Crisis of 2007. These market-centered views began to face criticism due to certain developments within the liberal framework. Foremost among these were rising global poverty and the deterioration of global income distribution. Liberalism, coupled with increasing competitive pressures, left non-competitive firms and weaker actors in difficult positions, pushing them toward the lower income strata of society. On the other hand, implementing economic policy became increasingly difficult with liberalism, government policy tools diminished, and governments struggled to address economic problems with limited measures. The greatest consequence was a global increase in inequality. Many liberal economies seeking to recover from the Global Financial Crisis, which began in 2007 and is known as the most global crisis in history, implemented public interventions with Keynesian-style economic policies. After the Global Financial Crisis, the validity of New Classical Economics views declined, and people and policymakers began to shift toward New Keynesian Economics as a new alternative.

Characteristics of New Classical Economics

Rational Expectations: The assumption that economic agents (individuals, firms, etc.) strive to make the best possible forecasts about future events and use current information and past experience in forming these forecasts.

Efficient Market Hypothesis

The hypothesis that markets fully and rapidly reflect all available information, and therefore prices are correctly determined. According to this hypothesis, it is impossible to consistently achieve above-average returns in markets without possessing superior information.

Equilibrium and Adjustment

New Classical Economics argues that market economies are naturally in equilibrium and possess a natural adjustment process to economic shocks. Therefore, it asserts that the effects of economic policies are generally limited.

Rational Pricing

New Classical Economics asserts that prices are determined rationally and that price changes in markets occur as a result of supply and demand equilibria. This implies that firms and individuals incorporate their future expectations into prices.

Natural Rate of Unemployment

New Classical Economics argues that unemployment has a natural level and that full employment is not continuously attainable. This natural rate of unemployment is determined by structural and institutional factors.

Effectiveness of Macroeconomic Policies

New Classical Economics argues that macroeconomic policies have limited impact on economic outcomes. Therefore, it contends that economic policies are generally ineffective and can sometimes be counterproductive.

Conceptual Framework

Phillips Curve

The relationship between New Classical Economics and the Phillips Curve emerges in analyses concerning the effectiveness of economic policies and the trade-off between unemployment and inflation. The Phillips Curve is a graph showing the relationship between the unemployment rate and inflation. It was first discovered in 1958 by A.W. Phillips using data from the United Kingdom. The curve typically exhibits an inverse relationship in the short run: as unemployment falls, inflation rises, and as unemployment rises, inflation falls.

Within the Keynesian economic tradition, this inverse relationship supports the idea that economic policies can be used to achieve a trade-off between unemployment and inflation. Specifically, demand-oriented economic policies—such as increasing government spending or expanding money supply—can reduce unemployment but increase inflation, while the reverse can increase unemployment and reduce inflation. New Classical Economics questions this short-run relationship of the Phillips Curve. New Classical economists argue that individuals act with rational expectations and that market equilibria cannot be disrupted in the short run in this manner. According to them, this temporary relationship between unemployment and inflation is unsustainable in the long run.

New Classical Economics maintains that the Phillips Curve holds only in the short run and that there is no relationship between inflation and the natural rate of unemployment in the long run. In this context, while New Classical Economics acknowledges that economic policies may have short-run effects, it exhibits greater skepticism regarding their sustainability and effectiveness in the long run. In this framework, it limits the impact of economic policies on the Phillips Curve and addresses the unemployment-inflation relationship in a more complex manner.

Lucas’s Supply Curve

The relationship between New Classical Economics and the Lucas Critique represents an important debate concerning the predictability and effectiveness of economic policies. The Lucas Critique is a concept introduced by Nobel laureate economist Robert Lucas Jr. In the early 1970s, Lucas questioned the effectiveness of macroeconomic policies and offered a critique in this context.

The Lucas Critique argues that macroeconomic policies cannot influence economic outcomes by altering people’s expectations. Specifically, it claims that economic policies, by changing expectations about future government policies and events, can alter individual behavior and thus lead to unintended consequences. This is consistent with the assumption that individuals act with rational expectations and base their behavior on those expectations.

New Classical Economics is similarly based on this premise. It argues that individuals act with rational expectations and make economic decisions accordingly. Therefore, the idea that economic policies can produce unintended consequences is consistent with the fundamental assumptions of New Classical Economics.

In this context, the relationship between the Lucas Critique and New Classical Economics contributes to debates on the effectiveness and predictability of economic policies. Both emphasize the limited impact of economic policies and warn policymakers to develop more careful and predictable policies. This encourages more thoughtful consideration of the implementation and consequences of economic policies.

Unpleasant Monetarist Arithmetic

New Classical Economics argues that economic policies can produce unintended consequences and that individuals, acting with rational expectations, can adapt to these policies. Within this framework, it questions the idea that governments can steer economic outcomes through economic instruments such as monetary or fiscal policy.

Unpleasant Monetarist Arithmetic represents the idea that economic policies can lead to specific outcomes, and that these outcomes may be undesirable. Specifically, this concept arises in situations such as central banks excessively printing money or governments uncontrolledly expanding budget deficits.

Monetarists argue that increasing the money supply will, in the long run, lead to higher inflation and can cause economic instability. Therefore, encountering “unpleasant” outcomes is possible, particularly when monetary policy tools are rapidly expanded.

New Classical Economics shares a similar foundation with the concept of Unpleasant Monetarist Arithmetic. Both argue that economic policies can lead to unintended and undesirable consequences. In this context, both approaches emphasize the need for careful implementation of economic policies and the prior consideration of their potential outcomes.

Criticisms of New Classical Economics

New Classical Economics has faced criticism on many fronts. These criticisms of its foundational assumptions have highlighted the need for New Classical economists to develop a more universal, solution-oriented, and rational framework. One of the core assumptions of New Classical Economics is that economic agents are rational and strive to make the best possible forecasts about future events. However, this assumption may not always hold in the real world. People sometimes think in the short term, make decisions emotionally, or operate with incomplete information. New Classical Economics argues that markets are generally efficient. Yet events such as financial crises and speculative bubbles demonstrate that markets are not always efficient. Asymmetric information, imperfect competition, and other factors can limit market efficiency.

New Classical Economics argues that macroeconomic policies are generally ineffective and can sometimes be harmful. However, in some cases, economic policies have been observed to be effective and capable of correcting economic imbalances. Therefore, criticisms exist regarding the appropriateness of policymakers adopting a completely passive role. New Classical Economics models often operate under idealized and simplified conditions and may not adequately reflect the complexity and uncertainty of the real world. Consequently, the applicability and validity of New Classical Economics’ theoretical framework in the real world can be questioned.