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Special Economic Zones in Africa
Table C.1 Country
Vietnam
Summary Data from Survey Samples (continued) Dates of survey
Aug–Sep 2009
Zones
Completed surveys
Bufalo Choloma All Zones Tan Thuan Linh Trung 1 Linh Trung 2
13 5 117 85 16 16
Operational firms 25 6 217 138 38 41
Percentage surveyed 52% 83% 54% 62% 42% 39%
*Estimate, no exact data available.
units. The results for single unit zones in Ghana and Senegal, in particular, should be treated with caution. Although the response rate for the majority of the questions was very high, some firms declined to respond to more sensitive questions (e.g., those related to sales and wages). When item nonresponse is high and could present a problem for our estimates, we highlight this in a footnote; if too few observations were available for a country, we did not include the information.
Notes 1. The data are collected using a standard survey instrument tailored to specific industry sectors (manufacturing, services, global). The surveys are administered by private contractors on behalf of the World Bank. The survey is completed by managing directors, accountants, human resource managers, and other company management. It uses a stratified random sampling methodology; sample sizes range from 250 to 1,500 businesses. For detailed methodological information, go to www.enterprisesurveys.org/methodology. 2. In Kenya, Lesotho, and Tanzania, the concentration of SEZ firms in enclaves meant that a significant number were asked to participate in the survey. 3. In Ghana and Senegal, selection of the firms to approach for the survey was determined by (1) location—only firms located in or near the capital (Accra and Dakar, respectively) were included in the population, and (2) industry— only firms in manufacturing and processing activities were included. Taking these two factors into account, the sample was constructed randomly. 4. Surveys were conducted in the Tema Export Processing Zone during July and August 2009; additional surveys of single factory free zones in the Accra region were conducted during October and November 2009.