2007 Economic Census

Different Methodologies

Sample Surveys versus Censuses

Published sample survey data include sampling and non-sampling errors. Published economic census data (except for Construction) only include non-sampling errors.

To confirm that data are comparable, data users need to review:

• the methodology text and published measures of reliability. Click on the title of the data set to find this text.

Business Classification

Some surveys and censuses capture data on an establishment basis and tabulate data up to firms, while others capture data on a firm basis to start with.

To confirm how the data are collected, data users need to review:

• Data users need to review the methodology text because classification of an entire firm (and all it’s establishments) may be quite different from the classification of each establishment of the firm. Click on the title of the data set to find this text.

Industry Self-Classification

Some surveys and censuses allow businesses to self-classify while others collect raw data that is then used to classify the business.

To confirm how establishments are classified, data users need to review:

• the introductory and methodology text because results of self-classification may be quite different from Census Bureau-performed classification. Click on the title of the data set to find this text.

Disclosure Handling

Disclosure processing is done separately for each census and survey.

Data users need to be aware of this:

• because it is possible to see different disclosure patterns for seemingly similar data across two or more surveys.