Table 2.

Relevance of keywords

Keywords	Relevance	Authors
Ageing workforce	The ageing population within workforces	Albuquerque and Ferreira (2015), Beach (2008) and Fougère et al. (2009)
Technology	Technology skills development assists senior workers performance	Case et al. (2015), Choi (2009) and Gonzalez and Morer (2016)
Productivity	Ageing population within workforces reduces the productivity level.	Lisenkova et al. (2012)
	Physical and mental health of senior workers reduces the productivity level.	Boenzi et al. (2015a), Hertel and Zacher (2018) and Koopman-Boyden and Macdonald (2003)
Employment	Heightening the retirement age is likely to increase the employability of senior workers.	Pitt-Catsouphes and Smyer (2006), Carmichael and Ercolani 2015 and Finch (2014)