PEDUC							     ISCED97	   LIS recode
  1  no schooling								1
  2  1 year in education							1
  3  2 years in education							1
  4  3 years in education							1
  5  4 years in education							1
  6  5 years in education							1
  7  6 years in education							1
  8  7 years in education							1
  9  8 years in education							1
 10  9 years in education							1
 11  10 years in education							1
 12  11 years in education							1
 13  12 years in education							2
 14  13 years in education							2
 15  14 years in education							2
 16  15 years in education							3
 17  16 years in education							3
 18  17 years in education							3
 19  18 years or more in education						3


REMARK about recoding :
Although the codes are based on years in education, we exeptionally carried out this recode.
The reason is that in other US datasets we have both the levels + years (see a.o. US2000).
The frequency distribution corresponds well to more recent US datasets.