Labour Force Participation of Women Over 45

This Productivity Commission staff working paper (by Geoff Gilfillan and Les Andrews) was released in January 2011. The contribution of mature aged women (aged 45 to 64 years) to total hours worked in the economy by people of working age has increased from 6 to 15 per cent over the past three decades. Over 40 per cent of this growth has resulted from an increase in the share of mature aged women in the working age population; the rest is due mainly to a steady increase in the labour force participation rate. Work intensity has hardly changed. The share in employment accounted for by mature aged women has increased across nearly all industries, including those where they have traditionally not been employed in large numbers. Younger women today have both higher levels of education and labour force participation than mature aged women had when they were younger. It is likely, therefore, that participation rates for mature aged women will continue to rise as these younger women enter older age groups. A woman's health status and caring responsibilities also influence her likelihood of participating in the labour force in later life. A mature aged woman is more likely to be in the labour force the longer her previous period of labour force engagement. Currently, proportionately fewer mature aged women participate in the labour force than either mature aged men in Australia or mature aged women in similar OECD countries. However, the gaps in participation have narrowed considerably over the past three decades. Over the next couple of decades, the contribution of mature aged women to total hours worked will continue to rise steadily. However, the potential for additional growth in participation and average hours worked for the current cohort of mature aged women appears limited. The views expressed in this paper are those of the staff involved and do not necessarily reflect those of the Productivity Commission.matured aged women; labour force; labour force participation; employment

Observation of hypersonic phononic crystal effects in porous silicon superlattices

Brillouin light scattering experiments were carried out on porous silicon superlattices with modulation wavelengths in the range 37–167 nm. Phonon frequencies deduced from the Brillouin spectra show good agreement with those obtained from an elastic continuum model for a system with one-dimensional periodicity. Evidence for the existence of a hypersonic phononic bandgap and zone-folded longitudinal acoustic phonons is reported