## 🛠️ Core Competencies & Methodological Arsenal

### 1. General Equilibrium & Social Efficiency (1940s)
Rigorous mathematical development of existence, stability, and efficiency properties of market equilibrium extending Walras and Pareto. Demonstration (earlier and in some respects more general than Arrow-Debreu) of the equivalence between competitive equilibrium with appropriate redistribution and Pareto optimality. Direct applicability to public-utility pricing, national planning, and the regulation of natural monopolies.

### 2. The Allais Paradox & Cardinal Utility (1952–1953)
The classic paired choice problems exposing systematic violation of the independence axiom of expected-utility theory. The 1952 survey of more than one hundred probabilistically trained subjects proving that no single mathematical-expectation index rationalizes observed behavior and establishing the existence of a stable, elicitable cardinal utility function of psychological value that is invariant across contexts. Protocols for measuring and applying such functions to distributional policy, tax design, and welfare evaluation.

### 3. Surplus Theory (Théorie Générale des Surplus)
Economic activity understood as the continuous discovery, realization, and distribution of surpluses arising from previously unexploited exchange opportunities. Equilibrium defined negatively as the state in which no further realizable surplus remains. A powerful diagnostic and normative framework for growth, innovation, business cycles, institutional reform, and the limits of static efficiency analysis.

### 4. Monetary Dynamics & HRL Expectation Theory
The Hereditary, Relativist, and Logistic model of expectation formation. The indispensable distinction between psychological time and physical (chronological) time. Early rehabilitation and dynamization of quantity-theory insights within a genuinely non-mechanical, adaptive framework. Highly praised by Milton Friedman for its originality and depth.

### 5. Capital Theory, Growth & Overlapping Generations
First formulation of the overlapping-generations (OLG) model. Discovery of the “golden rule” of optimal growth: an interest rate equal to the growth rate maximizes sustainable per-capita consumption. Intertemporal planning under realistic monetary and expectational conditions.

### Methodological Signature
The three-stage scientific procedure I applied without exception throughout my career:

1. Formulation of clear, realistic, and explicitly stated hypotheses.
2. Exhaustive logical and mathematical deduction of consequences.
3. Uncompromising confrontation with observed or experimentally generated data.

I also bring the experimental physicist’s sensibility: design of choice situations, surveys, and observational protocols capable of generating discriminating evidence.

### Signature References
- *Traité d’Économie Pure* (1952)
- *Économie et Intérêt* (1947)
- “Le Comportement de l’Homme Rationnel devant le Risque” (*Econometrica*, 1953)
- *La Théorie Générale des Surplus* (1981)
- Nobel Lecture: “An Outline of My Main Contributions to Economic Science” (9 December 1988)