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PubMed1988

A study of vital and health statistics of the Kainji Lake Area of Nigeria.

A survey of vital and health statistics, and the evaluation of collection of these data in the registration centres of Kainji Lake Area, are presented. Forty-two per cent of all deaths occurred below 10 years of age, with the largest percentage occurring below 5 years of age. The leading causes of all deaths were malaria, gastro-intestinal disorders and measles. Occurrence of an epidemic was found to be significant to the overall mortality. The role of traditional healers in the control of childhood mortality is discussed. About 34% of the women had married more than once and 56% of the divorces occurred after the first marriage. The causes of divorces were largely due to loss of affection and neglect. The number of deliveries in the hospitals was more than the number of registered births and no death was registered at the centres. A unique system of collection of vital information was suggested for the Kainji Lake Area.

Adolescent↗
PubMed1997

Severe and complicated malaria in Bikaner (Rajasthan), western India.

Severe and complicated malaria is an important cause of mortality in Plasmodium falciparum infection. We describe in this study the details of 532 cases of such syndromes admitted to hospital during an outbreak of malaria between September-December 1994. Increase in the annual rain fall, collection of water around Indra Gandhi Canal, forestation of shrubs around it and migration of labor, adaptation of Anopheles stephensi to desert climate and favorable breeding of An. culicifacies in the areas under impact of irrigation were presumptive causes of the outbreak in this region. Cerebral malaria (25.75%), hepatic involvement (11.47%), spontaneous bleeding (9.58%), hemoglobinuria (7.89%), severe anemia (5.83%), algid malaria (5.26%), ARDS (3%) and renal failure (2.07%) were the important manifestations. The overall mortality was 11.09%, which was high because of infection in the non-immune population of this area. Ignorance about the severity of this disease and lack of transportation facility was another important factor. Morality was highest in ARDS (81.25%) followed by severe anemia (70.97%), algid malaria (46.43%), renal failure (45.45%), jaundice (36.06%) and cerebral malaria (33.57%). Pregnancy was an important determinant increasing the mortality in female patients. Mortality was very high (82.35%) in those persons who presented with more than 3 syndromes together.

Acute Kidney Injury↗
PubMed1984

A multi-disciplinary interpretation of migration: amenity capitalization in both land and labor markets.

"Various disciplines have produced models to explain and predict human migration. A model is presented providing a taxonomy through which interdisciplinary insights can be synthesized. The imperfect information view emphasizes the role of wage differentials as representing arbitragible real utility differentials. The perfect information approach holds that wage and rent differentials are compensating differentials, eliminating real utility variation over space.... Empirical results [for the United States] are presented which support the latter equilibrium view.... The increasing relative importance of amenities as a determinant of migration [is suggested]."

Agriculture↗
PubMed1997

Division of labor of Schwann cell integrins during migration on peripheral nerve extracellular matrix ligands.

Myelination of the peripheral nervous system (PNS) requires the migration of Schwann cells during both development and regeneration. We have characterized the expression pattern of Schwann cell integrins and analyzed their role in migration on different ECM substrates known to be present within the PNS. We found that Schwann cells in cell culture express four beta1 integrins, alpha1 beta1, alpha2 beta1, alpha6 beta1, and another unidentified beta1 integrin, as well as two alpha v integrins, alpha v beta3 and alpha v beta8. Using the Varani migration assay, we found that laminin-1, laminin-2 (merosin), and fibronectin increased Schwann cell migration, while vitronectin and collagen did not increase migration compared to an uncoated plastic substrate. Schwann cell migration on laminin-1 and laminin-2 (merosin) was blocked by antibodies against beta1 integrins, but not affected by RGD peptides or antibodies against beta3 integrins. In contrast, migration on fibronectin was unaffected by antibodies against beta1 and beta3 integrins but was blocked by RGD peptides. This in vitro study shows that there is a division of labor of Schwann cell integrins in the regulation of migration on peripheral nerve ECM components; beta1 integrins mediate migration on laminin-1 and laminin-2 (merosin), while alpha v integrins mediate migration on fibronectin. Taken together, these results suggest that multiple interactions between Schwann cell integrins and ECM within the PNS will contribute to Schwann cell migration during myelination of the PNS.

Animals↗
PubMed1993

[The long-term development of labor force potential using alternative assumptions of (net) migration to Germany].

"Using model calculations to the year 2050, this paper shows the decisive role that assumptions on future (net) migration to Germany will play in the long-term development of the labor force potential. The particular focus of this paper is to point out the importance of (net) migration not only in terms of absolute figures, but more importantly in terms of the age and gender structure. The annual net migration of 500,000 or 250,000 persons leads, depending on the assumption of its age structure, to extreme differences in the long-term development of the labor force potential." (SUMMARY IN ENG AND FRE AND RUS)

Age Factors↗
PubMed1992

The future of Western Samoan migration to New Zealand.

"The history of Samoan migration to New Zealand, a demographic profile of the migrants, and the future of such migration are discussed. Migration became a serious phenomenon after independence in 1962, with primarily young, unskilled workers moving to take up jobs in the agricultural and service sectors. Remaining essentially unchanged since 1962, New Zealand's immigration policy gives preferential treatment to Western Samoans and recognizes their valuable labor contribution. The future of migration to New Zealand is discussed in the context of the costs and benefits to Western Samoa.... The author argues that emigration has been beneficial rather than deleterious to Western Samoa's development...." Data are from official sources.

Demography↗
PubMed1998

Family migration and employment: the importance of migration history and gender.

"This article uses event history data to specify a model of employment returns to initial migration, onward migration, and return migration among newly married persons in the U.S. Husbands are more likely to be full-time employed than wives, and being a parent reduces the employment odds among married women. Employment returns to repeated migration differ by gender, with more husbands full-time employed after onward migration and more wives full-time employed after return migration events. We interpret these empirical findings in the context of family migration theory, segmented labor market theory, and gender-based responsibilities." Data are from the National Longitudinal Survey of Youth from 1979 to 1991.

Americas↗
PubMed1995

The 1995-96 migration program.

"In May 1995 the [Australian] Government announced an increase in the migration program for 1995-96. The implications for family and skilled migration flows to Australia are explored." Topics considered include family migration; increased migration from China; skilled migration and the Australian labor market; immigration selection since March 1993; and the case of doctors trained overseas.

Asia↗
PubMed1981

A framework for modeling interregional population distribution and economic growth.

"An integrated model is proposed to capture economic and demographic interactions in a system of regions. This model links the interregional economic model of Isard (1960) and the interregional demographic model of Rogers (1975) via functions describing consumption and migration patterns. Migration rates are determined jointly with labor force participation rates and unemployment rates."

Demography↗
PubMed1988

Punjabi orchard farmers: an immigrant enclave in rural California.

Examination of the adaptation patterns of Punjabi Sikh orchard farmers in rural California provides further evidence of ways in which strong ethnic enclaves help to promote rapid economic self-sufficiency among immigrant groups. The discussion emphasizes the need to consider not only the cultural traditions of group members, but also the historical context of immigration and the immigrants' perceptions of their particular situation. The Punjabi case indicates, too, how the 1965 Immigration Act, with its preference for family reunification, has promoted the formation of immigrant enclave.

Agriculture↗
PubMed1993

Migration networks: a case study in the Philippines.

"In an attempt to consider contract labor and other forms of temporary migration from the Philippines within the context of several interacting processes, I will first examine aspects of the international economy and government policy that set the stage for labor movement. It will then be argued that international migration flows emerge as a complex set of links that connect individuals and communities to the national capital region and ultimately to places abroad. This approach acknowledges that structural imbalances provide conditions for potential movement, but that this potential is translated into movement flows only when links between various people, places and mediating structures are actually activated through social networks. Once these links are established, a cascading system of migration emerges that is held together by a series of interpersonal relationships."

Asia↗
PubMed2000

Gender differences in socioeconomic returns to family migration in Malaysia: the role of family decision making versus labor market stratification.

In this article the author examines gender differences in the effect of family migration on socioeconomic attainment in Malaysia. The analysis discerns the relative importance of gender roles in household migration decisions, compared to gender stratification in the labor market. The Malaysian economy has undergone rapid industrialization and great structural changes which have opened up new economic opportunities, particularly for women. Despite the somewhat advantaged position of women compared to men in the Malaysian labor market, the author finds that men experience much greater socioeconomic gains than women from family migration. Hence indicating that family migration decisions in Malaysia, rather than optimizing family gains, compensate for the gender effect in the labor market. However, the gains of Malaysian men are more assured when they move alone. Data for the study come from the second round of the Malaysian Family Life Survey.

Asia↗
PubMed1994

Internal migration, earnings, and the importance of self-selection.

This paper analyzes the impact of internal migration on earnings within the human capital model framework. Since migrants constitute a non-random sample of population, the endogenous nature of migration decision warrants necessary correction for the selectivity bias in their earnings function. The Mincer-type earnings model is thus augmented to determine the extent of this bias. Besides estimating the standard Mincerian earnings model, the paper also attempts to verify the learn-as-you-go proposition by introducing migration duration variables in the earnings model. Based on the household level Population, Labor Force, and Migration (1979-80) survey data, the analysis yields the following important conclusions: (i) the data allowed a meaningful estimation of Mincerian earnings function for migrants and non-migrants; (ii) the level of schooling was one of the important determinants of the distribution of income both for migrants and nonmigrants--the four categorical variables of education were in general statistically significant with expected signs, implying that the hypothesis of a positive relationship between income and education was accepted; (iii) the rates of return to education improved systematically with higher levels of education, thus confirming the notion that education serves as a signalling device; (iv) the age-income profile was almost linear for migrants but showed concavity for nonmigrants; (v) the presence of sample-selection was observed for migrants; and (vi) even after controlling for the influence of personal characteristics, i.e., education and experience, the long-standing migrants earned relatively more at the destination than the more recent migrants.

Age Factors↗