Eis um interessante artigo de Juselius & Franchini no qual se encontra este muito, muito, muito interessante trecho:
We shall, however,argue that the relevant issue is how theory enters empirical modelling and not whether one should choose between econometric modelling with or without theory. Hoover (2006) expresses this with admirable clarity:
“The Walrasian approach is totalizing. Theory comes rst. Empirical reality must be theoretically articulated before it can be empirically observed. There is a sense that the Walrasian attitude is that to know anything, one must know everything. ” …. “There is a fundamental problem: How do we come to our a priori knowledge? Most macroeconomists expect empirical evidence to be relevant to our understanding of the world. But if that evidence only can be viewed through totalizing a priori theory, then it cannot be used to revise the theory.”…”The Marshallian approach is archaeological. We have some clues that a systematic structure lies behind the complexities of economic reality. The problem is how to lay this structure bare. To dig down to find the foundations, modifying and adapting our theoretical understanding as new facts accumulate, becoming ever more confident in out grasp of the super structure, but never quite sure that we have reached the lowest level of the structure.”
Interessante, muito interessante. O estudante de Economia mais interessado em questões metodológicas realmente aprende um bocado sobre metodologia científica com um bom curso de Econometria.