“…Research thus far has covered various aspects of firm-based employee productivity. These are, (1) remuneration dispersion (Van Zyl 2010), (2) different age-skill categories (Van Zyl 2013a), (3) qualifications and training levels (Van Zyl 2013b), (4) employee diversity (Van Zyl 2014), (5) incentive schemes (Van Zyl 2015), ( 6) non-unionised participation platforms (Van Zyl 2016), ( 7) in-house training (Van Zyl 2017), ( 8) employee migration to smaller firms (Van Zyl 2019) and ( 9) the implementation of new technology (Van Zyl 2020).…”