Robustness is the buzzword

This last weekend I have spended all my time and energy to perform one more robustness check..the ultimate one that is. It just consists of re-doing all the spillover variables using a different weighting scheme. Initially, I have used the original Coe and Helpman (1995) ones. This time around the Lichtenberg and Van Pottelsberghe (1998) weights were applied to the international R&D stocks in order to tease out the spillovers arising via trade and FDI. With relief and pleasure one finds out that the results hold and are very similar. Triple stars around your estimates are always welcomed.