Abstract
Modern mainstream economics teach us that Marshallian consumer surplus concept can be correctly applied only in the special case of quasilinear preferences (when price of numeraire is normalized to unity), which is never observed in reality. Our paper shows the opposite: we can every time correctly apply individual and aggregate Marshallian surplus approach for the general class of differentiable preferences along subset of monotonous and piecewise monotonous parameterizations. Aggregate generalized consumer surplus - change in the sum of all consumers' incomes and net surpluses - is identically equal to the change in efficient social welfare function, if level of efficient social welfare is changing (piecewise) monotonously along adjustment path. Fundamental welfare theorems are proposed to generalization for potential application of aggregate Marshallian surplus measures and the relation between aggregated revealed preference approach, Coase' theorem, fundamental welfare theorems and representative consumer' approach is discussed.
Published Version
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