A consensus in the growth literature is that scale effects of R&D are non-existent across mature industrialized economies. However, the scrutiny across emerging economies is lacklustre at best. The empirical studies of scale effects also leave the issues of unbalanced regression (non-standard...

We build a semi-endogenous growth model for developing countries with non-rivalrous public factors, imported capital goods, and an export demand function. The model exhibits the three-way interaction between public and private investment and trade shown recently in the empirical literature. A...