1970 HUNGARIAN CENSUS OF POPULATION Information on the data collection and processing (1977)

I. THE COMPREHENSIVE REWIEV OF THE DATA COLLECTION AND PROCESSING - 11. The control of the reliability of the census

Occupational relations and type of work Similarly to individual occupation, the gross error is significant here too: 35,44 percent, compared with which the net error is considerably lower (4, 69 percent). In connection with the outstandingly high percentage proportion of gross errors however the circumstance mentioned in the methodological description must be taken into consideration, i. e. the gross error contains the wrong entries twice: once because they are missing from the right rubric, secondly because they figure in the wrong rubric. Even if the gross error is about 50 percent, the proportion of correctly grouped items is 70-80 percent and in the statistical data affected by the net error the + errors cancel each other. However, in the declarations -there is some upward bias, namely the efforts to get into a group on a higher educational level are striking. The census returns contain surplus in the groups of mental labour, just like this there is overestimation in the case of skilled workers and even semiskilled workers. All this affects percentage distribution only in the case of mental labour (the difference between percentages is 1, 77). The opposite of this can be best seen in "other physical labour". Since post-enumeration control is based on data from the employers, its correctness cannot be doubted but the more particular reason for deviation would require more thorough examination. It is also remarkable that in the rubrics of collective farmers the census shows certain surplus as opposed to the employed (Table 9). Table 9. INDEX NUMBERS OF THE RELIABILITY OF THE DATA BY OCCUPATIONAL RELATION AND BY TYPE OF WORK OF THE POPULATION CENSUS Occupational relation and type of work Percentage dist. Difference between percentages Identically grouped items Gross Net Index of inconsistency Occupational relation and type of work Census P.C. Survey Difference between percentages Identically grouped items errors Index of inconsistency Occupational relation and type of work Census P.C. Survey Difference between percentages in the percentage of the census return Index of inconsistency Employed persons: intellectual 27,26 25,49 + 1, 77 89,80 13,91 + 6,56 0,191 physical: skilled worker 22, 78 22,74 + 0,04 82,84 34,16 + 0,17 0,442 trained worker 18,81 18, 79 + 0, 02 71, 25 57,39 + 0,10 0, 707 outside worker 0, 74 0,86 0,12 86,84 42,11 -15,79 0,423 Other 13, 64 15,82 2,18 82,88 50,29 -16,05 0, 581 Members of cooperatives: intellectual 0,96 0,90 + 0, 06 72, 73 48,48 + 6,06 0,491 physical: skilled worker 3, 21 3,01 + 0, 20 70,00 53, 64 + 6,36 0, 554 trained worker 2,81 2, 61 + 0, 20 64, 01 64, 71 + 7,27 0, 666 outside worker 0,17 0,20 0, 03 77, 78 61,11 -16, 67 0, 595 other 9, 62 9,58 + 0, 04 90, 50 18,60 + 0,40 0, 206 Total 100, 00 100,00 82,28 35,44 4, 69 a/ 0,486' By social-occupational group: Agr icultu ral - phy s ical occupation 14, 77 14,84 0, 07 95,44 9,57 - 0,46 0,112 Non agriculturaloccupation 57, 32 58,54 1, 22 97,45 7,23 - 2,13 0,169 Intellectual 27, 91 26,62 + 1, 29 92, 04 11,30 + 4, 62 0, 352 Total 100, 00 100, 00 95, 64 8, 71 2, 58

a/ 0, 21

1' a/ Sum of the absolute numbers of net errors, compared with the total number of persons, b/ Simple arithmetical mean.