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All (132) (60 to 70 of 132 results)

  • Articles and reports: 12-001-X199500214392
    Description:

    Although large scale surveys conducted in developing countries can provide an invaluable snapshot of the health situation in a community, results produced rarely reflect the current reality as they are often released several months or years after data collection. The time lag can be partially attributed to delays in entering, coding and cleaning data after it is collected in the field. Recent advances in computer technology have provided a means of directly recording data onto a hand-held computer. Errors are reduced because in-built checks triggered as the questionnaire is administered reject illogical or inconsistent entries. This paper reports the use of one such computer-assisted interviewing tool in the collection of demographic data in Kenya. Although initial costs of establishing computer-assisted interviewing are high, the benefits are clear: errors that can creep into data collected by experienced field staff can be reduced to negligible levels. In situations where speed is essential, a large number of staff are involved, or a pre-coded questionnaire is used to collect data routinely over a long period, computer-assisted interviewing could prove a means of saving costs in the long term, as well as producing a dramatic improvement in data quality in the immediate term.

    Release date: 1995-12-15

  • Articles and reports: 12-001-X199500214393
    Description:

    Major uncertainties about the quality of elderly population and death enumerations in the United States result from coverage and content errors in the censuses and the death registration system. This study evaluates the consistency of reported data between the two sources for the white and the African-American populations. The focus is on the older population (aged 60 and above), where mortality trends have the greatest impact on social programs and where data are most problematic. Using intercensal cohort analysis, age-specific inconsistencies between the sources are identified for two periods: 1970-1980 and 1980-1990. The U.S. data inconsistencies are examined in light of evidence in the literature regarding the nature of coverage and content errors in the data sources. Data for African-Americans are highly inconsistent in the 1970-1990 period, likely the result of age overstatement in censuses relative to death registration. Inconsistencies also exist for whites in the 1970-1980 intercensal period. We argue that the primary source of this error is an undercount in the 1970 census relative to both the 1980 census and the death registration. In contrast, the 1980-1990 data for whites, and particularly for white females, are highly consistent, far better than in most European countries.

    Release date: 1995-12-15

  • Articles and reports: 12-001-X199500214394
    Description:

    In a 1992 National Test Census the mailing sequence of a prenotice letter, census form, reminder postcard, and replacement census form resulted in an overall mailback response of 63.4 percent. The response was substantially higher than the 49.2 percent response rate obtained in the 1986 National Content Test Census, which also utilized a replacement form mailing. Much of this difference appeared to be the result of the prenotice - census form - reminder sequence, but the extent to which each main effect and interactions contributed to overall response was not known. This paper reports results from the 1992 Census Implementation Test, a test of the individual and combined effectiveness of a prenotice letter, a stamped return envelope and a reminder postcard, on response rates. This was a national sample of households (n = 50,000) conducted in the fall of 1992. A factorial design was used to test all eight possible combinations of the main effects and interactions. Logistic regression and multiple comparisons were employed to analyze test results.

    Release date: 1995-12-15

  • Articles and reports: 12-001-X199500214395
    Description:

    When redesigning a sample with a stratified multi-stage design, it is sometimes considered desirable to maximize the number of primary sampling units retained in the new sample without altering unconditional selection probabilities. For this problem, an optimal solution which uses transportation theory exists for a very general class of designs. However, this procedure has never been used in the redesign of any survey (that the authors are aware of), in part because even for moderately-sized strata, the resulting transportation problem may be too large to solve in practice. In this paper, a modified reduced-size transportation algorithm is presented for maximizing the overlap, which substantially reduces the size of the problem. This reduced-size overlap procedure was used in the recent redesign of the Survey of Income and Program Participation (SIPP). The performance of the reduced-size algorithm is summarized, both for the actual production SIPP overlap and for earlier, artificial simulations of the SIPP overlap. Although the procedure is not optimal and theoretically can produce only negligible improvements in expected overlap compared to independent selection, in practice it gave substantial improvements in overlap over independent selection for SIPP, and generally provided an overlap that is close to optimal.

    Release date: 1995-12-15

  • Articles and reports: 12-001-X199500214396
    Description:

    We summarize some salient aspects of the theory of estimation functions for finite populations. In particular, we discuss the problem of estimation of means and totals and extend this theory to estimating functions. We then apply this estimating functions framework to the problem of estimating measures of income inequality. The resulting statistics are nonlinear functions of the observations. Some of them depend on the order of observations or quantiles. Consequently, the mean squared errors of these estimates are inexpressible by simple formulae and cannot be estimated by conventional variance estimation methods. We show that within the estimating function framework this problem can be resolved using the Taylor linearization method. Finally, we illustrate the proposed methodology using income data from Canadian Survey of Consumer Finance and comparing it to the ‘delete-one-cluster’ jackknifing method.

    Release date: 1995-12-15

  • Articles and reports: 12-001-X199500214397
    Description:

    Regression estimation and its generalization, calibration estimation, introduced by Deville and Särndal in 1993, serves to reduce a posteriori the variance of the estimators through the use of auxiliary information. In sample surveys, there is often useable supplementary information that is distributed according to a complex schema, especially where the sampling is realized in several phases. An adaptation of regression estimation was proposed along with its variants in the framework of two-phase sampling by Särndal and Swensson in 1987. This article seeks to examine alternative estimation strategies according to two alternative configurations for auxiliary information. It will do so by linking the two possible approaches to the problem: use of a regression model and calibration estimation.

    Release date: 1995-12-15

  • Articles and reports: 12-001-X199500214398
    Description:

    We present empirical evidence from 14 surveys in six countries concerning the existence and magnitude of design effects (defts) for five designs of two major types. The first type concerns deft (p_i – p_j), the difference of two proportions from a polytomous variable of three or more categories. The second type uses Chi-square tests for differences from two samples. We find that for all variables in all designs deft (p_i – p_j) \cong [deft (p_i) + deft (p_j)] / 2 are good approximations. These are empirical results, and exceptions disprove the existence of mere analytical inequalities. These results hold despite great variations of defts between variables and also between categories of the same variables. They also show the need for sample survey treatment of survey data even for analytical statistics. Furthermore they permit useful approximations of deft (p_i – p_j) from more accessible deft (p_i) values.

    Release date: 1995-12-15

  • Articles and reports: 12-001-X199500214399
    Description:

    This paper considers the winsorized mean as an estimator of the mean of a positive skewed population. A winsorized mean is obtained by replacing all the observations larger than some cut-off value R by R before averaging. The optimal cut-off value, as defined by Searls (1966), minimizes the mean square error of the winsorized estimator. Techniques are proposed for the evaluation of this optimal cut-off in several sampling designs including simple random sampling, stratified sampling and sampling with probability proportional to size. For most skewed distributions, the optimal winsorization strategy is shown, on average, to modify the value of about one data point in the sample. Closed form approximations to the efficiency of Searls’ winsorized mean are derived using the theory of extreme order statistics. Various estimators reducing the impact of large data values are compared in a Monte Carlo experiment.

    Release date: 1995-12-15

  • Articles and reports: 12-001-X199500214405
    Description:

    In this paper we explore the effect of interviewer variability on the precision of estimated contrasts between domain means. In the first part we develop a correlated components of variance model to identify the factors that determine the size of the effect. This has implications for sample design and for interviewer training. In the second part we report on an empirical study using data from a large multi-stage survey on dental health. Gender of respondent and ethnic affiliation are used to establish two sets of domains for the comparisons. Overall interviewer and cluster effects make little difference to the variance of male/female comparisons, but there is noticeable increase in the variance of some contrasts between the two ethnic groupings used in this study. Indeed, the impact of interviewer effects for the ethnic comparision is two or three times higher than it is for gender contrasts. These findings have particular relevance for health surveys where it is common to use a small cadre of highly-trained interviewers.

    Release date: 1995-12-15

  • Articles and reports: 75-001-X19950042454
    Geography: Canada
    Description:

    Using the new Revenue Canada RRSP room file, this study shows how current tax-assistance rules apply to members of different plans, how levels of tax-assisted savings can vary widely and how these savings are integrated. It also notes the number of persons falling into the various tax-assistance categories.

    Release date: 1995-12-05
Data (1)

Data (1) ((1 result))

  • Public use microdata: 82F0001X
    Description:

    The National Population Health Survey (NPHS) uses the Labour Force Survey sampling frame to draw a sample of approximately 22,000 households. The sample is distributed over four quarterly collection periods. In each household, some limited information is collected from all household members and one person, aged 12 years and over, in each household is randomly selected for a more in-depth interview.

    The questionnaire includes content related to health status, use of health services, determinants of health and a range of demographic and economic information. For example, the health status information includes self-perception of health, a health status index, chronic conditions, and activity restrictions. The use of health services is probed through visits to health care providers, both traditional and non-traditional, and the use of drugs and other medications. Health determinants include smoking, alcohol use, physical activity and in the first survey, emphasis has been placed on the collection of selected psycho-social factors that may influence health, such as stress, self-esteem and social support. The demographic and economic information includes age, sex, education, ethnicity, household income and labour force status.

    Release date: 1995-11-21
Analysis (90)

Analysis (90) (0 to 10 of 90 results)

  • Articles and reports: 11F0019M1995084
    Geography: Canada
    Description:

    The objective of this paper is to introduce in a new measure of the average duration of unemployment spells using Canadian data. The paper summarizes the work of Corak (1993) and Corak and Heisz (1994) on the average complete duration of unemployment in a non-technical way by focusing on the distinction between it and the average incomplete duration of unemployment, which is regularly released by Statistics Canada. It is pointed out that the latter is a lagging cyclical indicator. The average complete duration of unemployment is a more accurate indicator of prevailing labour market conditions, but some assumptions required in its derivation also imply that it lags actual developments.

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1993008
    Description:

    This paper describes the learning curve associated with breaking away from the traditional method of developing questions for a "paper and pencil" questionnaire to providing specifications for questions and flows for a programmer. It uses the Survey of Labour and Income Dynamics (SLID) as a case study.

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1993010
    Description:

    This paper evaluates the results of the questions related to activity limitation and its impact on labour market activity from the January 1993 Survey of Labour and Income Dynamics (SLID) test.

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1993018
    Description:

    This paper evaluates alternatives for weighting persons who join households after a respondent panel has been selected.

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1994002
    Description:

    This paper describes the experiences of other surveys in dealing with respondents. It also documents several viewpoints and survey findings on incentives and their effect on response rates as well as ways of maintaining interviewer morale.

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1994003
    Description:

    This report summarizes the results of the permission question, where respondents were asked if they would agree to allow Statistics Canada access to their Revenue Canada income tax records instead of completing an income survey questionnaire. This question was added as a supplement to the Labour Force Survey in August 1993.

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1994004
    Description:

    This report describes major expected uses for the data from the Survey of Labour and Income Dynamics (SLID).

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1994007
    Description:

    This report is based on a presentation made to the Annual Research Conference of the U.S. Census Bureau in March 1994. It reviews some of the highlights of a year of testing for the Survey of Labour and Income Dynamics (SLID).

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1994013
    Description:

    This paper presents three options for the calculation of the Survey of Labour and Income Dynamics (SLID) family income: the snapshot approach, the prorated approach and the subannual approach.

    Release date: 1995-12-30

  • Articles and reports: 75F0002M1994014
    Description:

    The paper presents an approach proposed for ensuring that the Survey of Labour and Income Dynamics (SLID) data are confidential.

    Release date: 1995-12-30
Reference (41)

Reference (41) (0 to 10 of 41 results)

  • Surveys and statistical programs – Documentation: 11F0019M1995083
    Geography: Canada
    Description:

    This paper examines the robustness of a measure of the average complete duration of unemployment in Canada to a host of assumptions used in its derivation. In contrast to the average incomplete duration of unemployment, which is a lagging cyclical indicator, this statistic is a coincident indicator of the business cycle. The impact of using a steady state as opposed to a non steady state assumption, as well as the impact of various corrections for response bias are explored. It is concluded that a non steady state estimator would be a valuable compliment to the statistics on unemployment duration that are currently released by many statistical agencies, and particularly Statistics Canada.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993001
    Description:

    This paper discusses the advantages and disadvantages of an approach to collecting income data being tested for the Survey of Labour and Income Dynamics (SLID) whereby respondents would be encouraged to refer to their T1 income tax forms.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993002
    Description:

    The paper provides question wording, lays out the possible responses, and maps out the flow of the questions for the Survey of Labour and Income Dynamics (SLID) labour interview questionnaire.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993004
    Description:

    This paper provides a description of the data collection procedures and the question wordings for the income and wealth portion of the Survey of Labour and Income Dynamics (SLID), as well as some rationale for the chosen direction.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993005
    Description:

    This paper presents general observations from the members of the Survey of Labour and Income Dynamics head office project team, a summary of responses by a subset of interviewers in the test who were asked to complete a debriefing questionnaire after completing the test and detailed comments by the observers from Head Office.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993006
    Description:

    This paper presents responses from a sample of interviewers from each Regional Office who were selected to complete a debriefing questionnaire for the Survey of Labour and Income Dynamics (SLID) preliminary interview.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993007
    Description:

    This report presents a summary evaluation of the quality of the data collected during the Survey of Labour and Income Dynamics (SLID) field test of labour market activity data, held in January and February 1993.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993009
    Description:

    This paper presents an analysis of the questions in the Survey of Labour and Income Dynamics (SLID) relating to supervision and management. It uses data collected in January 1993.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993011
    Description:

    This report presents a summary evaluation of the quality of the data collected during the Survey of Labour and Income Dynamics (SLID) field test of income and wealth, held in April and May 1993.

    Release date: 1995-12-30

  • Surveys and statistical programs – Documentation: 75F0002M1993012
    Description:

    This paper presents observations of the field test of the income and wealth content proposed for the Survey of Labour and Income Dynamics (SLID), as reported by members of the SLID head office project team and a summary of responses by a subset of interviewers who were asked to complete a debriefing questionnaire.

    Release date: 1995-12-30
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