Step 1: The variable plc0220_v1 is converted into Euro by divisor 1.95583 (not adjusted for inflation) for the years 1998 to 2001 and subsequently integrated into the harmonized variable plc0220_h. Step 2: The variable plc0220_h is replaced by the variable plc0220_v3 for the years 2003 to 2011. Step 3: The variable plc0220_v2 is converted into Euro by divisor 1.95583 (not adjusted for inflation) for the years 1998 to 2001 and subsequently integrated into the harmonized variable plc0220_h, if plc0220_v1 does not apply to the person asked and plc0220_v2 is greater than 0. Step 4: The variables plc0220_v2 and plc0220_v1 are both converted to Euro by divisor 1.95583 and added for the years 1998 to 2001 and subsequently integrated into the harmonized variable plc0220_h, if (plc0220_v1 is greater than or equal to 0 or plc0220_v1 is less than -8) and (plc0220_v2 is greater than or equal to 0 or plc0220_v2 is less than -8).