I am working with a panel data set in which I can observe not only if you were unemployed in the past year but also how many times you were unemployed and the duration of each unemployment spell. I would like the run a regression to identify how variables (such as job-search methods used each unemployment spell) affect the length of the unemployment spell.
The difficulties are threefold. First, each individual can report having multiple spells within a year, and the number of spells within a year differ person to person. Second, it is likely that there is some sort of heterogeneity that makes it impossible to treat each unemployment spell as a single observation and use individual fixed effects to denote the same individual. Finally, in the panel data, not every person is interviewed every year.
Basically, I was wondering if there is a standard method for dealing with this kind of multiple spell regression. I have done some searching, but all the papers I have found are fairly old, so I do not know if they are still relevant. Any guidance or advice would be greatly appreciated!