PEDUC							     ISCED97	   LIS recode
  1  no education, not even one year of primary school				1
  2  primary education						1		1
  3  lower secondary education					2		1
  4  upper secondary education					3C		2
  5  upper secondary education					3A,3B		2
  6  first stage of teritary education				5B		3
  7  first stage of teritary education				5A		3
  8  first and second stage of teritary education		5A,5B,6		3