ST2_6 Effect of stratum changes, joining and splitting of the enterprises on the estimator of a total

Document date: 
Monday, 28 August, 2017

Let us suppose that all statistical units (enterprises) are registered in a Business register (BR). This BR is used as a sampling frame for a stratified simple random sample without replacement, where the strata are formed by, for instance, the NACE code for economic activity and size - number of employees. The sampled units are used to estimate an overall population total of a variable . Now we assume that two types of errors occur that have an effect on the stratification of the units: 1) errors in the value of the classification variable - NACE code, identifying stratum and 2) errors in the composition of the enterprise.