Survey ID Number
MUS_2009_MS_v01_M_WB
Title
Micro-Enterprise Survey 2009
Sampling Procedure
For Mauritius, the sectors included in the sample by two-digit ISIC code were as follows: Manufacturing: 15, 18; Other Manufacturing: 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 , 36, 37; Services: 52; Residual/Remainder/Other Services: 45, 50, 51, 55, 60, 61, 62, 63, 64, 72. The Micro-Enterprise Survey targeted 120 registered establishments with one to four employees.
In Enterprise Surveys, the requirements for registration are defined on a country-by-country basis. In Mauritius, registration with the Register of Companies was used to define registered establishments.
Industry stratification was designed as follows: the universe was stratified into three manufacturing industries (food, textiles, and other), one services industry (retail) and one residual sector. The initial sample design targeted 120 micro establishments: 60 in manufacturing sector and 60 in services.
Given the stratified design, sample frames containing a complete and updated list of establishments as well as information on all stratification variables (number of employees, industry, and region) are required to draw the sample for Enterprise and Micro-Enterprise Surveys. Two frames were used in Mauritius. The first was a file of registered companies provided by the Central Statistical Office [CSO] in Mauritius updated to 2008. The second frame was supplied by the World Bank. It consisted of enterprises interviewed for Enterprise Survey (ES) in 2005. The World Bank required that attempts should be made to re-interview establishments responding to the 2005 survey where they were in the selected geographical regions and met eligibility criteria. That sample is referred to as the Panel.
The quality of the frame was assessed at the onset of the project and was not immune from the typical problems found in establishment surveys: positive rates of non-eligibility, repetition, non-existent units, etc. Given the impact that non-eligible units included in the sample universe may have on the results, adjustments may be needed when computing the appropriate weights for individual observations. The percentage of confirmed non-eligible units as a proportion of the total number of sampled establishments contacted for the survey was 35.2% (1039 out of 2,950 establishments for the ES and micro samples, including panel establishments).