Papell, D., Murray, C. and Ghiblawi, H. (2000) The Structure of Unemployment. Review of Economics and Statistics 82, 309-315.
ABSTRACT: Bai and Perron’s method for detecting multiple, unknown structural breaks was used to estimate natural rates of unemployment for 19 OECD countries from 1955-2011. Natural rates were lowest in the early period, then, rose in the mid-1970s and early-1980s in most countries. Several countries saw declines in the late-1990s or early-2000s.