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  Date of survey :

26/6 - 4/7/2008

  Survey method : Telephone survey with interviewers
  Target population : Hong Kong working population of age 18 or above
  Sampling method :
All data were collected by our interviewers using a Computer Assisted Telephone Interview (CATI) system which allowed real-time data capture and consolidation. To ensure data quality, on top of on-site supervision, voice recording, screen capturing and camera surveillance were used to monitor the interviewers' performance.
  Weighting method : The data reported have been adjusted according to the provisional figures obtained from the Census and Statistics Department regarding the gender-age distributions of the Hong Kong population at the end of 2007
  Sample size : 1,213 successful cases
  Effective Response rate : 75.5%
  Std. sampling error : Less than 1.4%