SINGAPORE, Sept. 26 -- Singapore's government is reviewing property purchases made by officers involved in rail planning after a research paper found public servants appeared more likely than others to buy homes near future MRT stations before the locations were publicly announced.

The Public Service Division (PSD) said the review would cover purchases made between 2007 and 2011, the period highlighted in the paper, involving properties close to locations that were later announced as MRT stations, Singapore-based news outlet CNA reported today.

But the research, published earlier this month by the US-based National Bureau of Economic Research, has not been peer-reviewed and does not establish that individual civil servants committed mis...