A study of 14,537 French firms was carried out to assess employment growth based on levels of new technological process, organizational innovation, commercial innovation, and research and development. The R2 was 74.3%. The coefficient estimates for these variables (and standard errors) were reported, in order, as follows:

-0.014(0.004), 0.001(0.004), 0.016(0.005), and 0.027(0.006)

Which of these variables have explanatory power over a firm's employment growth? Explain.