I am trying to aggregate the monthly CPS data using cpsidp in a way that I can link individuals’ employment status with the employment status they had last month. Yet, I found there are some breaks along the time line. No records for the same individual between 1976.12 and 1977.01 or btween 1977.01 and 1977.02 or between 1977.04 and 1977.05 or between 1977.06 and 1977.11… Is there any way I can fix this problem. So basically, if the agent is in this time range, I can not get their information last period. Is there any way I can fix this?