Survey non-response did occur but substitutions were made in order to potentially achieve strata-specific goals whenever this was done, strict rules were followed to ensure replacements were randomly selected within the same stratum. Attempts were made to contact the establishment for interview at different times/days of the week before a replacement establishment (with similar strata characteristics) was suggested for interview. Survey non-response was addressed by maximizing efforts to contact establishments that were initially selected for interview. The ES are also used to build a panel of enterprise data that will make it possible to track changes in the business environment over time and allow, for example, impact assessments of reforms. Data are used to create statistically significant business environment indicators that are comparable across countries. This allows for better comparisons across countries and across time. The ES currently cover over 160,000 firms in 148 countries, of which 139 have been surveyed following the standard methodology.
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Data are used to create indicators that benchmark the quality of the business and investment climate across countries. The Enterprise Surveys are conducted across all geographic regions and cover small, medium, and large companies. Since 2005-06, most data collection efforts have been centralized within the Enterprise Analysis Unit (FPDEA). Firm-level surveys have been conducted since 1998 by different units within the World Bank. An Enterprise Survey (ES) is a firm-level survey of a representative sample of an economy's private sector.