Great paper. This is issue of lack of complementary factors is actually critical for innovation, especially in LDCs. A mirror paradox occurs with innovation rates, which are very large, especially in Sub-Saharan Africa, compared to OECD countries, and do not translate into productivity gains. Again reflecting small innovations far from the technological frontier that lack the complementary factors needed to become substantial changes to the production process or firm organization. We defenetely need further understanding of the nature of innovation in developing countries, so this paper is a great contribution.