International and inter-temporal comparisons of labour productivity can differ depending on the measures of labour input used. For example, higher incidences of part-time employment in Germany and the Netherlands, or lower statutory hours, for example in France, are likely to result in lower international rankings of labour productivity for these countries, when calculated on a head-count basis, compared with measures based on hours worked. The opposite is true for countries with longer statutory hours or average working weeks (like Costa Rica, Chile, Eastern European economies, Mexico, South Africa and Turkey), or with a lower incidence of part-time employment (Eastern European countries, the Russian Federation and South Africa).
Over the period 2001-2016, GDP per hour worked increased more rapidly than GDP per person employed in nearly all countries, partly reflecting the increasing incidence of part-time employment and declines in average hours worked per person.