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The first survey wave 2007

Aside from preparatory activities, which included literature reviews, conceptual studies, preparatory visits and pre-tests of the questionnaire, the first major field activity of the research group was the conduct of a household survey in three provinces in Thailand and three provinces in Vietnam.

The questionnaire was developed in autumn 2006. It was divided into nine sections, listed with their content:

Section 1:  Survey information

Section 2:  Actual household characteristics

Section 3:  Shocks experienced during past five years and perceived risks for the next five years

Section 4:  Land, agriculture and natural resources

Section 5:  Off-farm employment incl. wage labour

Section 6:  Non farm self-employment incl. cottage industries

Section 7:  Borrowing, lending, public and other transfers and insurance

Section 8:  Household consumption

Section 9:  Assets incl. house

The interviews

In Thailand the survey has been conducted from 18 April to June 1, 2007. In Vietnam the survey started on June 12 and finished on August 6 in the provinces of Ha Thin and Hue and on August 20 in the province of Dac Lac.

Five PhD students from Leibniz University of Hannover , together with one, each of which from Georg-August-University of Göttingen, and Johann Wolfgang Goethe University of Frankfurt advised the local interviewers and assembled the interview data at the households direct on mobile computers. Afterwards these data were sent to Hannover, where they have to be proved and then taken over into the big database (SQL-Server).


Data cleaning

All the assembled data must be checked on consitency and plausability. This so-called data cleaning work needed a long time, reaching into the following year (2008).

In the first wave a dataset of 2186 (Thailand) and 2195 (Vietnam) questionnaires, with 450 variables and multiple rows per questionnaire had to be checked.

An attrition rate of 0,6 % (Thailand) resp. 0,2 % (Vietnam) occurs.


More details of the questionnaire, its theory and first results of the survey, you can find in:

Hardeweg, Bernd and Hermann Waibel (2009): Collecting data to measure vulnerability to poverty: An overview. Paper presented at Tropentag 2009.