Survey of Employment, Payrolls and Hours (SEPH)
Detailed information for September 2002
Data release - November 27, 2002
The Survey of Employment Earnings and Hours is produced from the combination of the Business Payroll Survey results and the payroll deductions administrative data received from Canada Customs and Revenue Agency.
The Survey of Employment, Payrolls and Hours is Canada's only source of detailed information on the total number of paid employees, payrolls, hours at detailed industrial, provincial and territorial levels. In addition to providing the principal input to Labour Income estimates, it also serves as a proxy output measure for about 15% of Real and Gross Domestic Product. The data are also used by the private sector for contract escalation and wage rate determination.
Reference period: The survey reference period corresponds to the pay period that includes the last seven days of the month
Collection period: The data are collected each month for the previous reference period.
- Employment and unemployment
- Hours of work and work arrangements
- Wages, salaries and other earnings
Data sources and methodology
This is a sample survey with a cross-sectional design.
This methodology does not apply.
Responding to this survey is mandatory.
To estimate SEPH variables not available from the administrative source, the results of the Business Payrolls Survey (BPS) conducted monthly are used. The BPS uses a stratified simple random sample of 11,000 establishments out of a population of 900,000 establishments taken from the Business Register. A one-twelfth rotation of the sample is done every month. The Business Payrolls Survey uses a combination of methods for data collection to permit maximum flexibility for the respondent. For mail units, questionnaires are mailed to the payroll office of employers each month. Computer-assisted telephone interviews (CATI) are used for respondents who express a preference for being surveyed by telephone. Respondents can also report their data electronically. Reporting units, which are non-respondents to the initial mailing, are followed up by telephone by the staff of the regional offices of Statistics Canada.
The estimates derived from the administrative source are then combined with the results of the BPS to produce estimates for the full range of SEPH variables.
Both manual and automated editing procedures are employed to detect and correct problematic data provided by the respondent on the BPS questionnaire. Historical edits (weighted and unweighted) are performed at the data collection stage.
1) imputing zero when the Canada Revenue Agency has been advised that there will be no employees in the month;
2) imputing from previous month information with a month-to-month change ratio (trend imputation) where there are indications that the units have activity in the current month;
3) imputing using other available variables (ratio imputation) and,
4) imputing based on current month stratum averages (mean imputation) in some cases where only one value has been reported.
Business Payrolls Survey: missing take-all establishments are imputed using the previous month's reports. In this way, respondent follow up is avoided while making use of as much data provided by the respondent as possible.
Because not all SEPH variables are available from the PD remittance forms, a small survey, the Business Payrolls Survey (BPS) is conducted each month to collect the additional information required.
The information obtained from the BPS is used to estimate the weekly component of the gross monthly payrolls, the total number of paid hours (regular hours and overtime) and the allocation of hours, earnings and employment for three categories of employees (salaried, paid by the hour and others such as commission workers.)
Estimation of the additional SEPH variables is done at the model group level, most of which are defined at the national and sub-sector levels except for a few cases where the employment size and the provincial dimensions are used. Regression coefficients calculated at the model group level are applied to the estimates of total employment and payrolls from the administrative sources to estimate the additional variables.
A micro-match is performed every month to compare the BPS data to the administrative source data (employment and payroll). Largest differences are looked at and corrected if necessary.
Various confidentiality rules are applied to all data that are released or published to prevent the publication or disclosure of any information deemed confidential. If necessary, data are suppressed to prevent direct or residual disclosure of identifiable data. The G-CONFID software is used to control disclosure of the data.
The results of the SEPH are reviewed using the appropriate security measures complying with the Statistics Act to assure the safeguarding of the respondent's information and to ensure that no enterprise may be identified through the release of the SEPH estimates.
Revisions and seasonal adjustment
Every month, coefficients of variation (CV) are published for all variables and every domain (by NAICS industry for Canada, the provinces and the territories). These CVs take into account the sampling variance coming from the BPS as well as the variance due to imputation of the administrative source.
- Employment, Earnings and Hours - Conversion table from SIC 1980 to NAICS.