Dividing hours by employment provides a measure of the number of hours worked per job. This component is referred to as the "work effort" and is also determined by the prevailing conditions in the labour market and the desire for work. It is also determined by decisions exercised by governments and trade unions in respect of the number of work hours permitted per week and the degree of labour market flexibility, such as over time and weekend trading. The sum of both the "employment rate" and the "work effort" can be used to provide a single component that reflects the overall conditions in the labour market (see Baldwin et al.) and its relative strength in driving real GDP Capita.