specter of a selection bias. Using novel datasets of the whole population of patents by Belgian firms and German universities …, we show that the single-office count results in a selection bias that affects econometric estimates of invention … a selection bias …

considered and re-estimated using a bivariate selectivity model. Our analysis suggests that sample selection bias could … sample selectivity. But the results obtained by Barro and Mauro are robust to sample selection bias …

specter of a selection bias. Using novel datasets of the whole population of patents by Belgian firms and German universities …, we show that the single-office count results in a selection bias that affects econometric estimates of invention … a selection bias …

selection bias. Using a novel dataset of the whole population of patents by Belgian firms, we show that the single office count … results in a selection bias that affects econometric estimates of innovation production functions. We propose a methodology to … evaluate whether estimates that rely on the single office count are affected by a selection bias …