type="main" xml:id="sjpe12037-abs-0001" <title type="main">Abstract</title> <p>This study discusses informal hiring in terms of a standard principal–agent model. We have developed an adverse selection model of the labour market where effort is not contractible and employers have the opportunity to use informal search...</p>

In a "Hayekian world," the market is a competitive exchange network that continuously solves a coordination problem. In this competitive context, expectations are endogenous, so planned actions are assumed to be mostly realizable. Nevertheless, economic crises are possible: not even...

This paper discusses the following two hypotheses. The first one is based on the epistemological proposal which we have named the principle of discontinuity. It asserts that certain developments in the history of economic thought involve theoretical breaks which can only be fully explained by...