[name]Just[/name] for fun, I decided to develop an index of fake children posted in the birth announcements section of nameberry. Obviously this index will never accurately capture all real, or all fake, children. I wanted to see if the forums’ becoming ‘tougher’ on trolling was having any effect.
I went off a few hypotheses. If you have issues with these premises, please recalculate according to your own.
Premises
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The nameberry user population is no different, biologically speaking, than the general human population in terms of percentage of male versus female conceptions or percentage of multiple births. Liking names does not influence one’s zygotes.
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Parents expecting multiples might be expected to be more excited about naming them, so sociologically we might see a larger proportion of multiple parents than the general population. I am willing to grant a 25% or so increase.
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99% of the nameberry user population is female, and given that the girls’ forum generates literally double the traffic of the boys’ forum, women appear to enjoy dreaming up fake female children more than fake male children. Therefore the excess percentage of female births is a good marker of fakery. Likewise, multiples are seen as more “special” and a more interesting naming challenge, and the excess percentage of multiple births is a good marker of fakery.
Facts:
A. Natural frequency distribution of gender in the human population: 49% Female, 51% [name]Male[/name]. Y-bearing sperm are lighter and swim faster, hence a slightly higher number of boy babies than girls.
B. Natural frequency of twinning: 1/80 pregnancies (1.25%). Real frequency of twinning in the US, due to assisted reproductive technology: 3.31%
C. Natural frequency of triplets: 1/6400 pregnancies (0.016%); Real frequency: 0.14%.
I’ve disaggregated the results by the last 5 quarterly babyberry reports. What do you think: are we getting better? We started cracking down in the fourth quarter of 2012, so look at 4/2012 & 1/2013 versus the earlier data.
EDIT: including second quarter 2013!
2/2013
Girls: (61) 49.2%
Boys: (63) 51.8%
Multiples: 7 twin sets: G/G: 2 G/B: 4 B/B: 1; proportion of girls: 57/43
Pregnancies: 124 singletons, 7 twins. Proportion of twin pregnancies: 5.3%
1/2013
Girls (76): 54%
Boys (64): 46%
Multiples: G/G: 4; G/B: 4; B/B: 2. Proportion of Girl babies in Twin Sets: 60/40
Pregnancies: 120 singletons, 10 twins. Proportion of twin pregnancies: 7.6%
4/2012
Girls: 59: 54%
Boys: 50: 46%
Multiples: G/G: 4 G/B: 4 B/B: 1. Proportion of Girl babies in Twin Sets 71/29
91 singletons, 8 twins: Proportion of twin pregnancies: 8.1%
3/2012
Girls: 56: 57%
Boys: 41: 43%
Multiples: G/G: 4 G/B: 1 B/B: 0; G/B/B: 2. Proportion of Girl babies in Twin Sets 83/17
81 singletons, 5 twins, 2 trips: Proportion of twin/triplet pregnancies: 5.7%; 2.3% [multiples: 8.0%]
2/2012
Girls: 84 61%
Boys: 54 39%
Multiples: G/G: 3 G/B: 5 B/B: 2 Proportion of Girl babies in Twin Sets: 55/45
118 singletons; 10 twins: Proportion of twin pregnancies: 8.5%
1/2012
Girls: 75 [64%]
Boys: 42 [36%]
Multiples: G/G: 1 G/B: 3 B/B: 1; G/B/B: 1. Proportion of Girl babies in Twin Sets [50/50]
104 singletons, 5 twins, 1 trips. Proportion of twin/triplet pregnancies: 4.5%; 0.9%; total multiples: 5.5%
5 quarters total:
Girls: 76 + 59 +56 +84 +75 = 350 [58%]
Boys: 64 + 50+41+ 54 +42 = 251 [42%]
Multiples: GG 16 GB 17 BB 8 [75/25] trips 3
Singeltons 514 Twins 38 Trips 3
** Edit 6 quarters total:
Girls: (61) + 76 + 59 +56 +84 +75 411 [56.6%]
Boys: (63) + 64 + 50+41+ 54 +42 314 [43.4%]
Multiples: G/G: 18 G/B: 21 B/B: 9; proportion of girls: 59.3%
Pregnancies: 124 singletons, 7 twins. Proportion of twin pregnancies: 5.3%
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Girls in Natural Population: 49%
Boys in Natural Population: 51%
Excess Girls = Observed/Predicted = 350/294 = 119% or 56 extra girls
Missing Boys = Observed/Predicted = 250/306= 81.6% or 56 missing boys
514 / 38/ 3 = 6.8% / 0.5%
Twins in total population: 1/80 (1.25%); US: 3.31%
Triplets in natural population: 1/6400 (0.016%); US: 0.14%
Excess twinning: 205%
Excess triplets: 357%