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Sonal Variation

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Journal Article
Demography (1967) 4 (2): 673–679.
Published: 01 June 1967
... by seasonality of coitus. 24 1 2011 © Population Association of America 1967 1967 Seasonal Variation Great Generality Sonal Variation Conception Date Coital Frequency References 1 Huntington , Ellsworth ( 1938 ). Season of Birth . New York : John Wiley and Sons . 2...
Journal Article
Demography (1979) 16 (1): 103–119.
Published: 01 February 1979
... previously constant, will fertility decline? It thus becomes important to be able to assess in advance whether changes in sea- sonal variations would alter overall fertil- ity, and to estimate the magnitude of the shift. The problem may be analogous to that of lactation. Long-term breastfeeding serves...
Journal Article
Demography (1996) 33 (3): 291–305.
Published: 01 August 1996
... that temperature has quantitatively important effects on both seasonal and nonsea- sonal variation in births. Summer temperature extremes reduce conceptions in the southern United States, explaining a substantial part ofthe observed seasonal birth pattern. Extreme cold shows no evidence of affecting conceptions...
Journal Article
Demography (1985) 22 (1): 89–100.
Published: 01 February 1985
... 69.3 68.0 91. 1 n 349 349 349 349 *Significant at 5% (two-tailed) **Significant at 1% (two-tailed) sonality of coition may be damped. Also Indiana is not a state with an especially large seasonal variation of births. Al- though the link between climate and fer- tility is not at all well understood...
Journal Article
Demography (2007) 44 (4): 705–728.
Published: 01 November 2007
..., Volume 44-Number 4, November 2007 Mercan, R., A. Mumcu, A. Isiklar, B. Balaban, C. Alatas, and B. Urman. 2003. The Impact of Sea- sonal Variations on Fertilization Rate, Embryo Quality, and Pregnancy Rates During Intracyto- plasmic Sperm Injection. Fertility and Sterility 80(Suppl.3):170 71. Panther...
Journal Article
Demography (1984) 21 (4): 501–517.
Published: 01 November 1984
.... -- and K. M. Schnabel. 1983b. Background and Characteristics of Undocumented Hispanic Migrants to the United States. Migration Today 11:6-13. Menken, J. A. 1979. Seasonal Migration and Sea- sonal Variation in Fecundibility: Effects on Birth Rates and Birth Intervals. Demography 16:103- 120. Mines, R. 1981...
Journal Article
Demography (1966) 3 (2): 305–318.
Published: 01 June 1966
... movements, since the latter are largely movements of small amplitude and short duration. The ratio of the original data to the centered twelve-month moving average for each month is an estimate of the sea- sonal and irregular components for that month, usually expressed by a multiplica- tive relationship...
Journal Article
Demography (1983) 20 (4): 541–568.
Published: 01 November 1983
... on the Census X-II program currently used by vital statistics agencies. Births and deaths exhibit strong sea- sonal patterns that create problems of analysis and interpretation for demogra- phers. In the study of monthly birth rates, for example, attention usually is focused on intrayear changes in trend...
Journal Article
Demography (1996) 33 (1): 98–110.
Published: 01 February 1996
... season im- poses heavy work pressure on rural mothers, associated with seasonal work commitments; this may lead to poor food han- dling. Thus food contamination almost inevitably causes sea- sonal diarrheal illness (Rowland et al. 1981). Fourth, sea- sonal malnutrition may contribute to diarrhea through...
Journal Article
Demography (1982) 19 (1): 79–95.
Published: 01 February 1982
... by any given separation, n* = n, From these considerations it follows that (3) simplifies to: An explicit expression for a is provid- ed in the appendix by formula (12). It is worth remarking that one may apply to single separations an argument already employed with respect to sea- sonal separation...
Journal Article
Demography (1979) 16 (3): 475–479.
Published: 01 August 1979
... will generate for women at age 50 a mean and standard deviation of children ever born closely correspond- ing to those produced by the same model when fecundability is allowed to vary sea- sonally within each year of age. The re- 475 476 DEMOGRAPHY, volume 16, number 3, August 1979 suits of the simulations...
Journal Article
Demography (2001) 38 (1): 67–78.
Published: 01 February 2001
... status refers to both the respect accorded to indi- viduals and the personal power available to them (Mason 1993). While women value prestige, it is the level of per- sonal autonomy that appears to influence demographic be- havior and resulting outcomes (Basu 1992; Jejeebhoy 1991). Autonomy has been...
Journal Article
Demography (1983) 20 (3): 407–413.
Published: 01 August 1983
... for the housing unit method. Sample surveys can alleviate the problem, but are expensive. Research directed toward developing symptomatic indicators of sea- sonality may lead to very useful refinements to the housing unit method. ACKNOWLEDGMENTS The authors are indebted to the Bu- reau of Economic and Business Re...
Journal Article
Demography (1971) 8 (3): 297–305.
Published: 01 August 1971
... was directed to the content of the census form. Whether or not a respondent per- sonally filled it out, he or she was asked: "Was there anything about the U. S. Census questions that you (or your spouse) objected to?" IF YES: "What was that?" Once again, there is very little variation in the answers...
Journal Article
Demography (1973) 10 (1): 1–17.
Published: 01 February 1973
..., and elass-homogeneous soeieties, whieh are charaeterized by low rates of per- sonal mobility (Germani, 1966; Kessin, 1971; Treiman, 1970). In sueh soeieties, mobility mechanisms are not institution- alized by edueation, and individual mo- bility is more the exeeption than the rule. Germani (1966) suggests...
Journal Article
Demography (1965) 2 (1): 593–599.
Published: 01 March 1965
.... However, we have additional infor- mation. Family planning attitudes and practices tend to diffuse through close per- sonal relationships. These relationships are not randomly distributed throughout the population but are highly structured -we may describe such structures as pat- terns of social distance...
Journal Article
Demography (1981) 18 (4): 465–486.
Published: 01 November 1981
...- bles in Figure 1 captured most of the basic patterns of variation. FARM MECHANIZAnON Of the variables in Table I with corre- lations over .65 with Ig , all except per- sonal income and farm mechanization seem to relate directly to the social role of children, educational attainment, or the urban...
Journal Article
Demography (1977) 14 (4): 381–389.
Published: 01 November 1977
... programs, and various social, political, and cultural factors. Similarly, patterns of differential mortality within a national population are influenced by in- dividual differences in income, education, occupation, access to medical care, per- sonal habits, nutrition and diet, etc. Be- cause these factors...
Journal Article
Demography (1973) 10 (2): 259–275.
Published: 01 May 1973
... interstate migration rates for per- sons one or more years of age for any one-year period between 1947-1948 and 1966-1967 (U. S. Bureau of the Census, 1968) . In 1935-1940 both the per capita per- sonal income of the state of origin and state of destination were directly related to interstate migration flows...
Journal Article
Demography (2005) 42 (3): 559–574.
Published: 01 August 2005
.... 1982. "Search for Rules for Search." Journal of Economic Behavior and Organization 3:65-81. Kalick, S.M. and T.E. Hamilton. 1986. "The Matching Hypothesis Reexamined." Journal of Per- sonality and Social Psychology 51:673-82. Ka1mijn, M. 1998. "Intermarriage and Homogamy: Causes, Patterns, Trends...