Five referendums were held in Switzerland in 1988.[1] The first two were held on 12 June on a federal resolution on the constitutional principles behind a co-ordinated transport policy and on a popular initiative on lowering the retirement age to 62 for men and 60 for women. Both were rejected by voters.[1] The final three referendums were held on 3 December on three popular initiatives "against real estate speculation", "for the shortening of labour time" and on limiting immigration. All three were rejected.[2] 
  Results
 June: Co-ordinated transport policy
   | Choice | Votes | % | 
  | For | 797,955 | 45.5 | 
  | Against | 955,300 | 54.5 | 
  | Blank votes | 32,243 | – | 
  | Invalid votes | 2,627 | – | 
  | Total | 1,788,125 | 100 | 
  | Registered voters/turnout | 4,267,923 | 41.9 | 
  | Source: Nohlen & Stöver | 
 June: Lowering the retirement age
   | Choice | Popular vote | Cantons | 
  | Votes | % | Full | Half | Total | 
  | For | 624,390 | 35.1 | 2 | 0 | 2 | 
  | Against | 1,153,540 | 64.9 | 18 | 6 | 21 | 
  | Blank votes | 12,892 | – | – | – | – | 
  | Invalid votes | 2,609 | – | – | – | – | 
  | Total | 1,793,431 | 100 | 20 | 6 | 23 | 
  | Registered voters/turnout | 4,267,923 | 42.0 | – | – | – | 
  | Source: Nohlen & Stöver | 
 December: Popular initiative against real estate speculation
   | Choice | Popular vote | Cantons | 
  | Votes | % | Full | Half | Total | 
  | For | 686,398 | 30.8 | 0 | 0 | 0 | 
  | Against | 1,543,705 | 69.2 | 20 | 6 | 23 | 
  | Blank votes | 31,548 | – | – | – | – | 
  | Invalid votes | 2,278 | – | – | – | – | 
  | Total | 2,263,924 | 100 | 20 | 6 | 23 | 
  | Registered voters/turnout | 4,285,419 | 52.8 | – | – | – | 
  | Source: Nohlen & Stöver | 
 December: Popular initiative on shortening working hours
   | Choice | Popular vote | Cantons | 
  | Votes | % | Full | Half | Total | 
  | For | 769,264 | 34.3 | 2 | 0 | 2 | 
  | Against | 1,475,536 | 65.7 | 18 | 6 | 21 | 
  | Blank votes | 18,677 | – | – | – | – | 
  | Invalid votes | 1,913 | – | – | – | – | 
  | Total | 2,265,390 | 100 | 20 | 6 | 23 | 
  | Registered voters/turnout | 4,285,419 | 52.9 | – | – | – | 
  | Source: Nohlen & Stöver | 
 December: Popular initiative on limiting immigration
   | Choice | Popular vote | Cantons | 
  | Votes | % | Full | Half | Total | 
  | For | 731,929 | 32.7 | 0 | 0 | 0 | 
  | Against | 1,506,492 | 67.3 | 20 | 6 | 23 | 
  | Blank votes | 23,752 | – | – | – | – | 
  | Invalid votes | 2,143 | – | – | – | – | 
  | Total | 2,264,316 | 100 | 20 | 6 | 23 | 
  | Registered voters/turnout | 4,285,419 | 52.8 | – | – | – | 
  | Source: Nohlen & Stöver | 
 References
   - ^ a b Nohlen, D & Stöver, P (2010) Elections in Europe: A data handbook, pp1931–1932 ISBN 9783832956097 
- ^ Nohlen & Stöver, p1932