Center for the Study of Democracy, UC Irvine

World Values Survey � Vietnam (2001)
Sample Design
  1. To gather a nationally representative sample using area probability sampling method, 20 provinces were randomly chosen among the 61 provinces of the country. The chosen provinces were distributed across eight census regions.
  2. Of the 20 provinces, a proportionate sample calculated by the province�s population determined the number of districts to be drawn for each province.
  3. From each chosen district, two villages or wards were randomly selected.
  4. For each village or ward, eight households were chosen using a designated-walk procedure.
  5. A member of the household who is over 18 and has the closest birthday was approached for the interview. No other person may be substituted.
  6. The desired sample was 1,000. The number of households contacted included an over-sampling of 1,300 for estimated potentially high non-response rates.
  7. Interviewing was conducted between August 28 and September 30, 2001.
  1. Below is the distribution of provinces across eight regions and the number of districts chosen per province (in parentheses):

    1. Red River Delta: Ha Noi (8), Hung Yen (3), Ha Nam (2), Thai Binh (6)
    2. Northeast: Lao Cai (3), Phu Tho (5), Bac Giang (6)
    3. Northwest: Lai Chau (3)
    4. North Central: Thanh Hoa (10), Ha Tinh (3)
    5. Central Coast: Quang Nam (4), Binh Dinh (5)
    6. Central Highlands: Dac Lac (4)
    7. Southeast: Ho Chi Minh City (13), Lam Dong (2), Binh Phuoc (2)
    8. Mekong River Delta: Dong Thap (5), An Giang (6), Ben Tre (4), Can Tho (6)