Table 1 reports the results for estimating alternative cross-country specifications of the Solow model on the basis of the original MRW data. Column (1) reproduces the MRW point estimates 7 for a human-capital-augmented Solow model on the basis of equation (4), where the level of technology is presumed to be part of the regression constant. In the empirical specification presented in Table 1, school measures the proportion of the working-age population that is in secondary education, which is taken as a proxy variable for the share of investment in human capital. The (reproduced) MRW results suggest that the international variation in output per worker can be explained by the international variation in the two capital–output ratios, conditional on a constant level of technology (see also equations (2) and (3) above).