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Journal Article
Demography (1987) 24 (4): 563–573.
Published: 01 November 1987
.... It is therefore important to understand the extent to which these two problems are related to other forms of age misreporting. One way to study this is to examine the distribution of terminal digits for age and year of birth by the occurrence of missing data or discrepancies." These distributions, adjusted...
Journal Article
Demography (1967) 4 (2): 859–875.
Published: 01 June 1967
... prior to1957 leads to an appraisal of the method of collecting Chinese age data in the 1957 census. 24 1 2011 © Population Association of America 1967 1967 Chinese System Digital Preference Chinese Date Terminal Digit Stable Population Theory References 1 Chen , Ta...
Journal Article
Demography (1979) 16 (1): 1–25.
Published: 01 February 1979
... series, but it may also lie in the census series. It seems likely that those who had divorced had less exact recall of duration since first marriage and were more prone to digit preference than those in contin- uing marriages, where passing an endur- ance marker is often cause for celebration. If those...
Journal Article
Demography (1998) 35 (4): 413–419.
Published: 01 November 1998
..., as both mem- bers of the couple have HICs that share the initial nine-digit Social Security number of the primary recipient and differ only in their BIC. Note that the only relevant earnings are those taxed by Social Security; income above the taxable cap is not used in these computations. Cross...
Journal Article
Demography (1987) 24 (3): 413–430.
Published: 01 August 1987
... of heaping on preferred digits is not excessive with this type of data, sampling fluctuations often create irregularities. Furthermore, Bracher and Santow (1981) showed that current status 413 414 DEMOGRAPHY, volume 24, number 3, August 1987 data overestimate the duration of amenorrhea, since women who...
Journal Article
Demography (1981) 18 (3): 287–307.
Published: 01 August 1981
... problems resulting from digit preference or age heaping, the need to use dichotomous dependent variables, unavoidable truncation biases in the basic data, and structural shifts in the determinants of breastfeeding at different durations. 30 12 2010 © Population Association of America 1981 1981...
Journal Article
Demography (1976) 13 (1): 45–64.
Published: 01 February 1976
... ). Liege : Belgium: IUSSP . Hastings Cecil ( 1955 ). Approximations for Digital Computers . Princeton : Princeton University Press . Lee C. F. , & Lin K. H. ( 1975 ). Conceptive Delay, Non-susceptible Period and Cohort Fertility Patterns . Demography , 12 , 143 – 153...
Journal Article
Demography (1970) 7 (2): 255–271.
Published: 01 May 1970
...- ter the birth. After that, the probabili- ties are irregular, peaking at multiples of six months and especially at 24 months -probably an artifact of the digital preference of mothers in reporting the age of the child in months when the events occurred. (See question B 12 in Appendix 1.) Lactation...
Journal Article
Demography (1977) 14 (1): 121–129.
Published: 01 February 1977
... of the last digit (units digit) of numbers in all cells in the data matrix to a zero (0) or five (5). This procedure is invoked after the complete matrix, includ- ing subtotals and totals, has been com- posed and just before output on printer or magnetic tape. In addition to random-rounding, an- other...
Journal Article
Demography (1979) 16 (3): 389–399.
Published: 01 August 1979
... three-digit 1974 occupation. This ratio was derived from an extract of the 1970 Census public use sample for a population of men with characteristics similar to those of our sample. Other measurement strategies are not feasible. In particular what seems to be the best alternative strat- egy...
Journal Article
Demography (2001) 38 (4): 467–479.
Published: 01 November 2001
... as the first time the couple had penetrative sex. Digit preference in reporting dates and durations also may affect the data. Durations of breast-feeding, abstinence, and amenorrhea are often rounded off to numbers such as 3, 6, 12, or 18 months (Brass and Rashad 1992; Casterline et al. 1984; Diamond, McDonald...
Journal Article
Demography (1984) 21 (2): 235–257.
Published: 01 May 1984
... as a conservative proxy for edu- cational attainment. Occupational groups used are based on regrouping of 3-digit census classifications. The de- tailed codes were regrouped to build categories that were internally homoge- neous with respect to educational attain- ment. Note that existing 2-digit or other coarse...
Journal Article
Demography (1967) 4 (2): 423–441.
Published: 01 June 1967
...-interval by only one digit in the third decimal place. By applying formula (24), the overall sex-ratio for the total stable population is 0.986. By applying the approximation in- troduced here (formula [31 the numeri- cal value for the (approximate) overall sex-ratio in the stable population is 0.984...
Journal Article
Demography (1979) 16 (4): 485–492.
Published: 01 November 1979
... own right. Within the division of mathematics, we find such demographically relevant areas a~ mathematical modeling, calculatory aids, ~nalogue and digital computation, numencal analysis, and various aspects of statistics, including statistical inference estimation, hypothesis testing, and struc...
Journal Article
Demography (1970) 7 (3): 361–368.
Published: 01 August 1970
... with the two-region case, Actual applications of age-specific, n-region models with migration inputs from outside, all with variable coeffi- cients, would be simulated on a digital computer. The models give no indication as to how these various processes might be ef- fected (e.g. zero natural growth...
Journal Article
Demography (1999) 36 (3): 355–367.
Published: 01 August 1999
... or had held a job within the last five years, specific questions relevant to the job descrip- tion or business were asked. These responses were later coded to a basic three-digit occupation and three-digit indus- try code, as documented by the U.S. Bureau of the Census (1971), by highly specialized...
Journal Article
Demography (2009) 46 (1): 127–145.
Published: 01 February 2009
... and have several shortcomings in that regard these surveys reached a large number of households and collected a substantial amount of data on the impact of the hurricanes, making them very useful for analytical purposes. At the state level, we used list-assisted, random-digit dialing to contact...
Journal Article
Demography (1967) 4 (1): 293–309.
Published: 01 March 1967
... variables one at a time after a start from the highest zero-order correlation. The method is described in M. A. Efroymson, "Multi- ple Regression Analysis," in Mathematical Meth- ods for Digital Computers, ed. Anthony Ralston and Herbert S. Will (New York: John Wiley & Sons, 1960), pp. 191-203. Stepwise...
Journal Article
Demography (2022) 59 (1): 161–186.
Published: 01 February 2022
... applied to different data and topics in demography by adapting the R code we provide. Cesare et al. (2018) noted that demographers have used some ML techniques in the analysis of digital trace data, such as for the (semi)automatic coding of tweets ( Karamshuk et al. 2017 ). We showed how demographers...
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Journal Article
Demography (1966) 3 (1): 259–275.
Published: 01 March 1966
... of significant digits, 8 in the IBM 7094. The sweeping-out process thus may introduce a small but accumulat- ing error.) 6. If any of the factors is in error, improve it by the iteration process of Step 3. 7. Use the quadratic formula, x = (-p ± p2 - 4q)/2, to find the roots of the fac- tors. These are also...