This section outlines Michael A. Heilperin’s central theoretical contribution: the argument that the mechanism for re-establishing equilibrium in international payments is fundamentally the same regardless of the monetary system in place. Whether a country operates under a gold standard with fixed parities or a system of free paper currencies with flexible exchanges, the underlying economic adjustments required to correct an imbalance are identical. This powerful insight reframes the entire inter-war debate, moving it away from a false choice between technical systems and toward the true choice between internationally coordinated stability and nationalist-driven chaos.

6.1 The Core Mechanism of Adjustment

A disequilibrium in a country’s balance of payments manifests through different symptoms depending on the monetary system.

• Under a system of fixed parities (like the gold standard), a persistent deficit results in an outflow of gold.
• Under a system of flexible exchanges, a persistent deficit results in the depreciation of the currency’s exchange rate.

Heilperin argued that regardless of the symptom, the corrective adjustment must operate through the same two fundamental channels to be effective and lasting:

1. Influencing International Flows of Short-Term Funds: A country with a payments deficit must attract short-term capital. The primary tool for this is raising the domestic interest rate (via bank rate policy) to make holding funds in the country more attractive.
2. Affecting the Balance of Trade: The country must increase its exports and/or decrease its imports. This is achieved by contracting the domestic money supply, which exerts downward pressure on prices, making its goods more competitive internationally.

Conversely, a surplus country must allow an expansion of its money supply and a lowering of its interest rate to restore balance. These are the universal instruments of action.

6.2 The False Opposition Between Fixed and Flexible Exchanges

This universal principle dissolves the supposed opposition between fixed and flexible exchange rates. This universal principle of adjustment reveals why Heilperin dismissed the supposed dilemma between internal and external stability (Section 2.3) as fallacious; a nation that refuses to accept the internal adjustments required for external stability will ultimately achieve neither.

If a system of “flexible exchanges” is to achieve long-run stability rather than devolving into chaos, it must allow the same fundamental adjustment mechanisms to work as they do under the gold standard. A depreciating currency is merely a symptom of disequilibrium; to correct the underlying cause, the country must still implement policies that raise interest rates and contract the money supply. If it fails to do so—for example, by pursuing an inflationary policy to offset the currency depreciation—it is choosing monetary nationalism and, ultimately, chaos.

The real issue is one of policy discipline. As Heilperin powerfully concluded, the conflict is between “international monetary stability and monetary chaos leading to the adoption of exchange controls and ultimately to milder or more developed forms of state socialism.” A country can choose to submit to the discipline required for international stability under either fixed or flexible exchanges, or it can reject that discipline and slide toward disintegration.

6.3 Responding to Major Disturbances

While the core mechanism addresses typical imbalances, major disturbances pose a more severe challenge. Heilperin identified the primary causes of such shocks as:

• Divergent price movements between countries, often caused by uncoordinated domestic policies.
• Sudden changes in the flow of long-term capital.
• Large-scale “flights of capital” driven by crises of confidence.

He concluded that these major disturbances are almost always “either caused or amplified by nationalism,” whether economic or political. When these shocks occur, short-term financial adjustments are often insufficient or even counterproductive (as in a capital flight). In these acute cases, the ultimate “burden of long-term adjustment falls on trade items,” requiring significant and often painful changes in a nation’s trade balance.

Understanding this universal mechanism is the prerequisite for analyzing how different currency systems—such as the gold standard or free paper currencies—either facilitate or obstruct this necessary process of adjustment.