Cross-Country Growth Empirics and Model Uncertainty: An Overview (Ülkelerarasi Büyüme Farkliliklarina Iliskin Ampirik Çalismalar ve Model Belirsizligi: Genel Bir Bakis)
The aim of this paper is to provide an overview of empirical cross-country growth literature. The paper begins by describing the basic framework used in recent empirical cross-country growth research. Even though this literature was mainly inspired by endogenous growth theories, the neoclassical growth model, especially its augmented version by Mankiw, Romer and Weil (1992) is still the workhorse for cross-country growth empirics. The second part of the paper, emphasises model uncertainty, which is indeed immense but generally neglected in the empirical cross-country growth literature. The most outstanding feature of the literature is that a large number of factors have been suggested as fundamental growth determinants. Together with the small sample property, this leads to an important problem, model uncertainty : Which factors are more fundamental in explaining growth dynamics and hence growth differences are still the subject of academic research. Recent attempts based on general-to-speciffic modeling or model averaging are promising but have their own limits. Finally, the paper highlights the implications of model uncertainty for policy evaluation.
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