“…Both papers estimate the impact of the 2012 reform in a DD setting at the firm level. In Boeri et al (2017) the main treatment is equal to the share of 55+ workers who had to postpone retirement over all 55+ employment; in Bianchi et al (2020), it is equal to the average number of years of minimum retirement age delay for those individuals that, at the end of 2011, were at most 3 years far from being eligible to receive a public pension (defined as Close To Retirement, CTR); the treatment is divided by the number of individuals close to retirement. In both cases, the measure of the treatment is standardized by some measure of the number of individuals that were at risk of being treated.…”