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- 1. Nonparametric propensity weighting for survey nonresponse through local polynomial regression ArchivedArticles and reports: 12-001-X200900211039Description:
Propensity weighting is a procedure to adjust for unit nonresponse in surveys. A form of implementing this procedure consists of dividing the sampling weights by estimates of the probabilities that the sampled units respond to the survey. Typically, these estimates are obtained by fitting parametric models, such as logistic regression. The resulting adjusted estimators may become biased when the specified parametric models are incorrect. To avoid misspecifying such a model, we consider nonparametric estimation of the response probabilities by local polynomial regression. We study the asymptotic properties of the resulting estimator under quasi-randomization. The practical behavior of the proposed nonresponse adjustment approach is evaluated on NHANES data.
Release date: 2009-12-23 - Articles and reports: 16-001-M2009010Geography: Census metropolitan area, Census agglomeration, Census metropolitan area partDescription: Households in Canadian municipalities often have options when choosing the type of water they drink at home and whether they treat it prior to drinking it. The reasons why they might choose to treat their water could be aesthetic or there might have been problems in the past that are influencing their decisions today. Using data from the 2007 Households and the Environment Survey, the author explores some of the factors governing these decisions for households in a selection of Canadian municipalities.Release date: 2009-12-09
- Articles and reports: 11-522-X200800010968Description:
Statistics Canada has embarked on a program of increasing and improving the usage of imaging technology for paper survey questionnaires. The goal is to make the process an efficient, reliable and cost effective method of capturing survey data. The objective is to continue using Optical Character Recognition (OCR) to capture the data from questionnaires, documents and faxes received whilst improving the process integration and Quality Assurance/Quality Control (QC) of the data capture process. These improvements are discussed in this paper.
Release date: 2009-12-03 - Articles and reports: 11-522-X200800010992Geography: CanadaDescription:
The Canadian Community Health Survey (CCHS) was redesigned in 2007 so that it could use the continuous data collection method. Since then, a new sample has been selected every two months, and the data have also been collected over a two-month period. The survey uses two collection techniques: computer-assisted personal interviewing (CAPI) for the sample drawn from an area frame, and computer-assisted telephone interviewing (CATI) for the sample selected from a telephone list frame. Statistics Canada has recently implemented some data collection initiatives to reduce the response burden and survey costs while maintaining or improving data quality. The new measures include the use of a call management tool in the CATI system and a limit on the number of calls. They help manage telephone calls and limit the number of attempts made to contact a respondent. In addition, with the paradata that became available very recently, reports are now being generated to assist in evaluating and monitoring collection procedures and efficiency in real time. The CCHS has also been selected to implement further collection initiatives in the future. This paper provides a brief description of the survey, explains the advantages of continuous collection and outlines the impact that the new initiatives have had on the survey.
Release date: 2009-12-03 - Articles and reports: 11-522-X200800010993Description:
Until now, years of experience in questionnaire design were required to estimate how long it would take a respondent, on the average, to complete a CATI questionnaire for a new survey. This presentation focuses on a new method which produces interview time estimates for questionnaires at the development stage. The method uses Blaise Audit Trail data and previous surveys. It was developed, tested and verified for accuracy on some large scale surveys.
First, audit trail data was used to determine the average time previous respondents have taken to answer specific types of questions. These would include questions that require a yes/no answer, scaled questions, "mark all that apply" questions, etc. Second, for any given questionnaire, the paths taken by population sub-groups were mapped to identify the series of questions answered by different types of respondents, and timed to determine what the longest possible interview time would be. Finally, the overall expected time it takes to complete the questionnaire is calculated using estimated proportions of the population expected to answer each question.
So far, we used paradata to accurately estimate average respondent interview completion times. We note that the method that we developed could also be used to estimate specific respondent interview completion times.
Release date: 2009-12-03 - 6. Trends in police-reported serious assaults ArchivedArticles and reports: 85-002-X200900410930Geography: CanadaDescription:
This article examines the incidence and nature of three types of police-reported serious assaults in Canada: assault with a weapon or causing bodily harm, aggravated assault and assault against peace officers (including police). The characteristics of these offences are presented and the long and short-terms trends are discussed at the provincial and census metropolitan levels. Adult and youth court data are also utilized to analyze the decisions and sentencing outcomes for serious assault cases.
Release date: 2009-10-28 - 7. International differences in low-paid work ArchivedArticles and reports: 75-001-X200910613231Geography: CanadaDescription:
Like the United States and the United Kingdom, Canada has a higher proportion of low-paid jobs than Australia and most countries in continental Europe. While the differences with continental Europe highlight different approaches to the labour market, the much lower rate of low-paid work in Australia is more puzzling since that country shares many similarities with Canada. Differences in wage-setting mechanisms appear to play a role in explaining the disparity in rates of low-paid jobs.
Release date: 2009-09-18 - 8. Family work patterns ArchivedArticles and reports: 75-001-X200910813235Geography: CanadaDescription:
Women's labour market participation has increased substantially over recent decades, creating challenges for families in balancing work-life responsibilities. The examination of family work patterns revealed significant differences in annual hours of work between families with and those without children.
Release date: 2009-09-18 - Articles and reports: 82-003-X200900310921Geography: CanadaDescription:
This study identifies, in a representative sample of Canadian children, age-related patterns of overweight and obesity between toddlerhood and childhood. The data are from cycles 2 through 5 (1996/1997 to 2002/2003) of the National Longitudinal Survey of Children and Youth. The sample comprised children aged 24 to 35 months at baseline, who were followed biennially over six years.
Release date: 2009-09-16 - 10. Food in Canada ArchivedArticles and reports: 16-201-X200900010878Geography: CanadaDescription: The feature article, Food in Canada, begins with a brief historical perspective on fishing and farming in Canada and moves on to explore the impact of the food system on the economy, environment and society. It illustrates how the contribution of the food system to gross domestic product and employment has shifted over the past forty years, and investigates the impact of primary food production on land, water, air and climate. The article concludes with a characterization of what is on the Canadian table, and the greenhouse gas emissions and energy-use associated with household food purchases.Release date: 2009-06-09
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Articles and reports (13)
Articles and reports (13) (0 to 10 of 13 results)
- 1. Nonparametric propensity weighting for survey nonresponse through local polynomial regression ArchivedArticles and reports: 12-001-X200900211039Description:
Propensity weighting is a procedure to adjust for unit nonresponse in surveys. A form of implementing this procedure consists of dividing the sampling weights by estimates of the probabilities that the sampled units respond to the survey. Typically, these estimates are obtained by fitting parametric models, such as logistic regression. The resulting adjusted estimators may become biased when the specified parametric models are incorrect. To avoid misspecifying such a model, we consider nonparametric estimation of the response probabilities by local polynomial regression. We study the asymptotic properties of the resulting estimator under quasi-randomization. The practical behavior of the proposed nonresponse adjustment approach is evaluated on NHANES data.
Release date: 2009-12-23 - Articles and reports: 16-001-M2009010Geography: Census metropolitan area, Census agglomeration, Census metropolitan area partDescription: Households in Canadian municipalities often have options when choosing the type of water they drink at home and whether they treat it prior to drinking it. The reasons why they might choose to treat their water could be aesthetic or there might have been problems in the past that are influencing their decisions today. Using data from the 2007 Households and the Environment Survey, the author explores some of the factors governing these decisions for households in a selection of Canadian municipalities.Release date: 2009-12-09
- Articles and reports: 11-522-X200800010968Description:
Statistics Canada has embarked on a program of increasing and improving the usage of imaging technology for paper survey questionnaires. The goal is to make the process an efficient, reliable and cost effective method of capturing survey data. The objective is to continue using Optical Character Recognition (OCR) to capture the data from questionnaires, documents and faxes received whilst improving the process integration and Quality Assurance/Quality Control (QC) of the data capture process. These improvements are discussed in this paper.
Release date: 2009-12-03 - Articles and reports: 11-522-X200800010992Geography: CanadaDescription:
The Canadian Community Health Survey (CCHS) was redesigned in 2007 so that it could use the continuous data collection method. Since then, a new sample has been selected every two months, and the data have also been collected over a two-month period. The survey uses two collection techniques: computer-assisted personal interviewing (CAPI) for the sample drawn from an area frame, and computer-assisted telephone interviewing (CATI) for the sample selected from a telephone list frame. Statistics Canada has recently implemented some data collection initiatives to reduce the response burden and survey costs while maintaining or improving data quality. The new measures include the use of a call management tool in the CATI system and a limit on the number of calls. They help manage telephone calls and limit the number of attempts made to contact a respondent. In addition, with the paradata that became available very recently, reports are now being generated to assist in evaluating and monitoring collection procedures and efficiency in real time. The CCHS has also been selected to implement further collection initiatives in the future. This paper provides a brief description of the survey, explains the advantages of continuous collection and outlines the impact that the new initiatives have had on the survey.
Release date: 2009-12-03 - Articles and reports: 11-522-X200800010993Description:
Until now, years of experience in questionnaire design were required to estimate how long it would take a respondent, on the average, to complete a CATI questionnaire for a new survey. This presentation focuses on a new method which produces interview time estimates for questionnaires at the development stage. The method uses Blaise Audit Trail data and previous surveys. It was developed, tested and verified for accuracy on some large scale surveys.
First, audit trail data was used to determine the average time previous respondents have taken to answer specific types of questions. These would include questions that require a yes/no answer, scaled questions, "mark all that apply" questions, etc. Second, for any given questionnaire, the paths taken by population sub-groups were mapped to identify the series of questions answered by different types of respondents, and timed to determine what the longest possible interview time would be. Finally, the overall expected time it takes to complete the questionnaire is calculated using estimated proportions of the population expected to answer each question.
So far, we used paradata to accurately estimate average respondent interview completion times. We note that the method that we developed could also be used to estimate specific respondent interview completion times.
Release date: 2009-12-03 - 6. Trends in police-reported serious assaults ArchivedArticles and reports: 85-002-X200900410930Geography: CanadaDescription:
This article examines the incidence and nature of three types of police-reported serious assaults in Canada: assault with a weapon or causing bodily harm, aggravated assault and assault against peace officers (including police). The characteristics of these offences are presented and the long and short-terms trends are discussed at the provincial and census metropolitan levels. Adult and youth court data are also utilized to analyze the decisions and sentencing outcomes for serious assault cases.
Release date: 2009-10-28 - 7. International differences in low-paid work ArchivedArticles and reports: 75-001-X200910613231Geography: CanadaDescription:
Like the United States and the United Kingdom, Canada has a higher proportion of low-paid jobs than Australia and most countries in continental Europe. While the differences with continental Europe highlight different approaches to the labour market, the much lower rate of low-paid work in Australia is more puzzling since that country shares many similarities with Canada. Differences in wage-setting mechanisms appear to play a role in explaining the disparity in rates of low-paid jobs.
Release date: 2009-09-18 - 8. Family work patterns ArchivedArticles and reports: 75-001-X200910813235Geography: CanadaDescription:
Women's labour market participation has increased substantially over recent decades, creating challenges for families in balancing work-life responsibilities. The examination of family work patterns revealed significant differences in annual hours of work between families with and those without children.
Release date: 2009-09-18 - Articles and reports: 82-003-X200900310921Geography: CanadaDescription:
This study identifies, in a representative sample of Canadian children, age-related patterns of overweight and obesity between toddlerhood and childhood. The data are from cycles 2 through 5 (1996/1997 to 2002/2003) of the National Longitudinal Survey of Children and Youth. The sample comprised children aged 24 to 35 months at baseline, who were followed biennially over six years.
Release date: 2009-09-16 - 10. Food in Canada ArchivedArticles and reports: 16-201-X200900010878Geography: CanadaDescription: The feature article, Food in Canada, begins with a brief historical perspective on fishing and farming in Canada and moves on to explore the impact of the food system on the economy, environment and society. It illustrates how the contribution of the food system to gross domestic product and employment has shifted over the past forty years, and investigates the impact of primary food production on land, water, air and climate. The article concludes with a characterization of what is on the Canadian table, and the greenhouse gas emissions and energy-use associated with household food purchases.Release date: 2009-06-09
Journals and periodicals (1)
Journals and periodicals (1) ((1 result))
- Journals and periodicals: 18-504-XGeography: Province or territoryDescription: Remote Sensing and Geospatial Analysis (RSGA) of the Agriculture Division prepared a series of maps and statistics that show the progression of the 2009 Red River valley flood in Manitoba for the spring of 2009. Starting with an image acquired on March 31, the maps were produced from the analysis of Radarsat-2 satellite image data integrated with 2006 Census of Agriculture data and census geography boundary files. From this analysis, the total area of flooded agriculture land and the number of farmers affected were calculated. A comparison is made with the 1997 flood that occurred in the same region.Release date: 2009-05-11
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