I formulate and estimate a model of externalities within countries and technological interdependence across countries. I find that external returns to scale to physical capital within countries are 8 percent; that a 10 percent increase of total factor productivity of a country's neighbors raises...

The rise and decline of nations throughout history continuously puzzles economists. Experience shows that successful economic performance is a very complex process, the scope of which goes well beyond the simplified neoclassical approach to growth. Business environment is a key determinant of...