Productivity growth is defined as the capacity of individuals to generate added value, or in other words, the ability to earn. Aside from being somewhat lucky, the ability to earn cannot be acquired without actual efforts to achieve it, and this applies to both individuals and firms. Active efforts to respond to a changing business environment are thus required.
While agriculture has been steadily shrinking in terms of its share of GDP, its share in employment remains both dominant and relatively static. In effect, a constant proportion of the labour force is generating a declining share of output.