Before revision: different preferences for Chernobyl liquidators) for the three most important preferences (free Monitiez transport, 50%-price suburban rail transport, free supply of drugs): a choice between the preference and some extra money.
After revision: different preferences for Chernobyl liquidators) for the three most important preferences (free local transport, 50%-price suburban rail transport, free supply of drugs): a choice between the preference and some extra money.