Fig 4. Change in log GDP per capita (G).

The three top figures (Fig 4 a,b,c) are visualizations of the changes in G per capita for best models with one (Fig 4 a), two (Fig 4 b) and five (Fig 4 c) terms. The three figures in the vertical middle (Fig 4 d,e,f) represents 1% (Fig 4 d), 10% (Fig 4 e) and 50% model averaging models. The three figures at the bottom is representations of feedforward neural networks with 1 (Fig 4 g), 6 (Fig 4 h) and 10 (Fig 4 i) neurons in the hidden layer.