Matches in Harvard for { ?s ?p Card image data format. For 1978 data, 4,709 individual records were missing one or more variables and placed in a missing data file. The other 4,618 observations, which contained complete information, were randomly split into an estimation sample of 1,540 observations and a validation sample of 3,078. For 1980 data, 3,810 individual records were missing information on one or more variables and were placed in a missing data file. The other 5,739 observations, which contained complete information, were randomly split into an estimation sample of 1,435 observations and a validation sample of 4,304 observations.. }
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- catalog description "Card image data format. For 1978 data, 4,709 individual records were missing one or more variables and placed in a missing data file. The other 4,618 observations, which contained complete information, were randomly split into an estimation sample of 1,540 observations and a validation sample of 3,078. For 1980 data, 3,810 individual records were missing information on one or more variables and were placed in a missing data file. The other 5,739 observations, which contained complete information, were randomly split into an estimation sample of 1,435 observations and a validation sample of 4,304 observations.".
- catalog requires "Card image data format. For 1978 data, 4,709 individual records were missing one or more variables and placed in a missing data file. The other 4,618 observations, which contained complete information, were randomly split into an estimation sample of 1,540 observations and a validation sample of 3,078. For 1980 data, 3,810 individual records were missing information on one or more variables and were placed in a missing data file. The other 5,739 observations, which contained complete information, were randomly split into an estimation sample of 1,435 observations and a validation sample of 4,304 observations.".